Open Know-How

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Replacement part for an Air-shields infant warmer model IICS

openknowhow.org

Francesca, Gustavo

We propose the use of picoHydro power systems in Guatemala and Honduras to meet rural electricity demands, cleanly and efficiently. Specific...

alternator conversion to generator

car parts upcycle

picohydro power

Ki Pass, Tennisgirl

When most people think about giving birth they plan on it being in a hospital where the doctors does everything and they do nothing more tha...

This is a retractable cooling mechanism for the Recyclebot. Recyclebot can be a showcase example for OSAT - Open Source Appropriate Technolo...

retractive cooling

osat 3d-printable designs

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

open source design

salt spray chamber modifications

salt spray chamber

The modular pegboard is designed to replace more costly methods of tool storage. I chose to create a customizable pegboard due to the large ...

Load rack for bicycles, to be made on the spot. Bicycles are used for transporting bulky and heavy loads. It is trickey to do this in a way ...

Here are step-by-step instructions on how to reconstruct Aluminum Awareness. This includes the construction of the shell as well as the crea...

There are many great gardening tools in the world today, but one of the most useful in many ways is the hori hori knife. That's 'dig dig' in...

An easy to use portable lock, no tools needed

openknowhow.org

The Starboard Cork house at Rancho Mastatal was built using various natural building techniques, including mortise and tenon, wattle and dau...

travel internships

earthen construction

earthen plaster

alternative building

bamboo construction

wattle and daub

Slot die coating is growing in popularity because it is a low operational cost and easily scaled processing technique for depositing thin an...

One of the most important decisions one makes about housing is its size. Smaller houses cost less initially, have lower maintenance (for exa...

Shane Oberloier

The goal of this project is to create a machine capable of manufacturing printed circuit boards (PCB) in an efficient and 'green' way. There...

Dkj9, Daylene Miyahara, BethEschenbach

The purpose of this page is to describe the photovoltaic system on Music Building A at Cal Poly Humboldt(HSU), which harnesses a renewable s...

Hcantrell, Shiloki587, Lorelei, Sarajune

A community-sized composting system designed for The Community Center of Appropriate Technology (CCAT) at Cal Poly Humboldt in Arcata, CA. C...

Evashiu, Lysaught

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Cheap and easy beehive anyone can make. Beekeeping is an ancient DIY art, performed by amateurs and makers for centuries. Anyone can produce...

55 gallon barrel

Aaron, Selena, Big Russ

It's a lot of fun hauling cargo around on a bike. A bike trailer can make a bicycle more practical for transporting groceries, laundry, frie...

upcycling gallery

As populations grow worldwide and natural resources diminish it has become important for people to consider and implement more sustainable m...

sustainable linving

This charcoal pen is useful in developing countries as some school supplies cannot be found and afforded in low class towns and villages. Th...

school supplies

Great advances have been made in various 3D printing methods for ceramics. Fabrication of Si-based ceramics using polymer-derived ceramics (...

additive manufacturing

fused filament fabrication

open source 3d printing

polymer-derived ceramics

preceramic polymers

thermoplastic polyurethanes

Solar parabolic cooker with the mechanical mathematician! I now think that 'compound' parabolic dishes have numerous advantages. (A compound...

parabolic solar cookers

I had been thinking for a long time about a selective and non-lethal trap against the Asian hornets that hurt beekeepers. The idea came to m...

Create a method to print a flexible base for a strain gage, radically reducing the cost of structural measurements.

neural network calibration

boltable strain gage

The Hippo Water Roller was specifically designed to alleviate the suffering caused by a lack of access to water. The Hippo Water Roller is ...

Annie, CCAT, Ajr60, Ducketsnotdodgers

The Wash n' Flush is a Cal Poly Humboldt environmental science 410 senior project implemented by Jeffrey Steuben, Annie Welbes and Tim Dower...

grey water flush

toilet modification

sustainable design

How do you go about installing a permaculture garden in Chicago and Cook County? See Beginners permaculture garden for general guidelines fo...

permaculture techniques

urban agriculture

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

This OSAT is a heavy-duty rope pulley that can be used to raise water from a well. This pulley can be customized to any desired size, and ca...

Crawler Harnesses can be cumbersome to keep in your tackle box without a holder and more often than not, if you're walleye fishing, you have...

crawler harness

Use (recycled) Lithium Ion Batteries instead of Alkaline (AA, AAA, C, etc) for consumer electronics. Electric/electronic devices, designed t...

alkaline replacement

This is a mobilization wedge used by physical therapists to perform manual spinal mobilization techniques and other various exercises. The t...

mobilization wedge

physical therapy

osat 3d-printable designs

All twenty-five communities in Nunavut are dependent on the use of imported diesel fuel for their electricity, which results in environmenta...

renewable energy

Some really nice and useful information on this web site. Also I conceive the style and design holds superb features.

electric lighting

connection basics

JamesCreek, Rcg211, Cyn 39

Friends of the Dunes is a non-profit organization, and works to protect and preserve the natural habitats of the dunes. Their Coastal Nature...

Hmm318, Chadiehl537, Stormtrooper51

After hearing about some issues that Zane Middle School needed help addressing, Team Rain Catchers (Chip Brocious, Charles Diehl, Hannah Mar...

educational rainwater catchment

Mmwarhus, Melissa Wright, Jgponton

Our idea is to create a self illuminating LED that is powered by ultravoilet and infrared light. The casing is the power source absorbing in...

Current door handles seen in most homes require a twisting force from a human hand to unlock the door. The issue that arises from this aging...

Spare part for electrically or foot operated suction used in medical wards

openknowhow.org

Malcolmmoncheur

This page documents the final course project for the Spring 2021 ENGR 535 (Development Technology) course at Cal Poly Humboldt. Our team was...

low-cost sensor

Jessvech, Nathan Cooke

MIT's D-lab developed a method to turn agricultural wastes into affordable smokeless fuels, such as sugarcane charcoal and corn cob charcoal...

JBattles, PazLebov

This greenhouse design project is geared for use in the Northern California coastal region, which is known for its cool, wet winters. The co...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

The bulk of CCAT maintenance is kept track of on the various OM pages that show up on the CCAT kiosk. Some very long term (greater than once...

ccat active project

long term maintenance

This OSAT is a hand cultivator. It is used to clear land and to assist in gardening tasks. This is an appropriate tool because it assists in...

hand cultivator

Generate your own nuts, bolts, washers and threaded rod

openknowhow.org

ABStilwell, Molson

The need was expressed for a device in which could turn waste newspaper and other light paper products into small burnable briquettes. This ...

Threaded cap for output of a diesel water pump (1" OD)

openknowhow.org

Water tight seal for a 1/2" BSP fitting

openknowhow.org

The AC Team consists of: Jesse Cody, Jack Gates, Alec Howard, and Jeremy Potter. We worked with Zane Middle School to create a portable char...

solar charging station

renewable energy demonstration

repurposed materials

charge controller

In the research of semiconductor and nanosciences, the dimensions of the substrate fall into a great variety. Substrates with irregular dime...

Carrienoburden, Tressie

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Savage.daniele, Jamieester

Thomas J McMurray, founder of McMurray's roofing company originated in Des Moines Iowa in 1919. Twenty nine years later his company expanded...

Building a garden at Sunny Brae Middle School is one step towards creating an experiential learning facility designed to educate middle scho...

sustainable education

sustainable farm energy alternatives

Annie.bartholomew, Cece.torres, Dustin.Poppendieck, Izterico

Eureka Floor Carpet One (Figure 1) sells floor coverings and performs installments to homes and commercial businesses across Humboldt County...

Mitsuki Mitsukai

The purpose of this project was to determine whether laminate flooring or Marmoleum which is a brand of linoleum, has the least impact on th...

I currently have a job lined up with a welding company as a Mechanical Engineer upon graduation and thought about how male electrical recept...

welder plug cover

shock risk reduction

Recent work has shown that small-scale combined heat and power (CHP) and solar photovoltaic (PV) technologies have symbiotic relationships, ...

energy production

heating and cooling

combined heat and power

energy conservation measures

Bloody Scoundrel

My water bottle stripper is designed to use discarded water bottles to make strong lengths of plastic cordage that can then be used for anyt...

bottle stripper

plastic recycling

Mkhultin, Mcm781

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

solar hot water heater

solar collector

drain-back gravity feed unit

flat solar collectors

80 gallon water storage container

surgical retractor

medical equipment

Evashiu, Asabet

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Lava y Jala el inodoro (Wash n' Flush) es un proyecto de la clase superior de ciencia medioambiental 410 de Cal Poly Humboldt, ha sido imple...

grey water flush

toilet modification

sustainable design

conservacion del agua

In early 2000, urban gardens were started in Bangkok under the direction of the NGO, Thailand Environment Institute (TEI). Bangkok has a pop...

urban agriculture

must be printed in PP and tested in autoclave before mass use

thermometer jar

A spare knob for the African Clean Energy cookstove

openknowhow.org

A box of homemade worm compost is a practical solution and ecologically appropriate to transform organic waste into natural fertilizer. This...

The project is complete and a success.

The benefits of urban gardening include adding: educational, food providing, therapeutic, and community strengthening green spaces. Urban ga...

organic farming

urban agriculture

vertical garden

Jvc104, Adrienneagawin, Lcj66

It's Always Sunny worked with Mary Mattingly, an artist based in New York City. She is collaborating with Live Arts/Fringe to design the Wet...

distilled water

I created a compost system for a 2 person household in Williams Bay, Wisconsin. I wanted the system to be simple easy to use and made from t...

This is the Operation and Maintenance (O&M) manual for CCAT greenshed cob wall. Please refer to it and keep it up to date with any O&M chang...

ccat active project

Currently, the majority of electronic waste is disposed of in a landfill. The remainder is processed in an energy inefficient manner, where ...

materials processing

electronic waste

talbot water tap

automatic water shut off

Jose Alves da Silva

3D printed prosthetic hand that did not require any fasteners or tools to assemble

openknowhow.org

atmospheric water harvesting

Goal of this project is a design of a tool for attitude system testing for CubeSat class of satellites. It is based on the airbearing princi...

airbearing test bed

attitude system

The open-source release of self-replicating rapid prototypers (RepRaps), has created a rich opportunity for low-cost distributed digital fab...

rapid prototyping

electrochemical detection

Prevent cross-contamination from waste and generate energy using heat exchanger. Our medical waste incinerators are designed to provide effi...

JurassicGreenhouse

mobile greenhouse

gardening lessons

Ath164, Mark THE shark, Marianac

The Two Pendulum Harmonograph was created by Team C.R.A.M (Creative Reuse Art Machine) in the ENGR215 Introduction to Design class at Cal Po...

upcycling gallery

Cep42, Trs318, Eah23

These are the component instructions for the assembly and construction of the Poly Pod designed by Team Apple Skins.The solution consists of...

social sustainability

There are many ways to construct a parabolic dish. This method aims to be the simplest and most quickly adjustable one. This method does not...

| health-topic = Maternal mortality

Sistema Biobolsa constructed a biodigester toilet in Haiti Communitere. The biodigester toilet processes human waste into fertilizer and met...

travel internships

waste to energy

anaerobic digestion

composting toilets

The goal of this project was to improve on a previous design which targeted to make a GPS belt clip, this is specifically targeted at search...

Lonny, Lauren p, Cjt13, Annie, Humboldt Chris, HappinessOnEarth

Cal Poly Humboldt's Campus Center for Appropriate Technology (CCAT) was started in 1978 and has been going strong since. With three live in ...

rainwater catchment

The United Nations Development Programme (UNDP) and Dutch-Belgian finance group Fortis announced, in 2008, the first project agreements of t...

millenium development goals

greenhouse gas reduction

Joins three flexible pipe (silicone/PVC with ID 4-7mm)

openknowhow.org

Team Ocynthia, Fionaconnor

elevated planter

For first responders to remove large blocks of debris

openknowhow.org

Drawing Exchange (DXF)

Rmf26, Zacharyruiz, Sdp20

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

water purification

Slleonar, Ceverett, Dshein, Mlmulder

The primary method for deposition of InGaN is Metal-organic Chemical Vapor Deposition (MOCVD), a form of chemical vapor deposition (CVD), pi...

industrial ecology

energy efficiency

environmental philosophy

waste management

A charcoal cooler uses the principal of evaporative cooling to maintain a cool interior temperature for refrigeration and food preservation....

evaporative cooling

food preserving

air conditioning

Kgv40, Lexington333, APenny6, Henry Chinaski, Aen131

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

The Patsari Cookstove, an improved cook stove is an adaption and improvement of the Lorena Cookstove which has been in use in Guatemala and ...

improved cook stoves

international development

surgical retractor

medical equipment

Biomass gasification is the most efficient method to convert organic material into heat. Additionally, this gas may be used to fuel both int...

wood gasification

biomass gasification

You've just arrived in a less developed country or community. The language is different and the culture is different - not to mention the fo...

developing countries

aid and development workers

For wearing around wrist for injury rehabilitation process in health posts

openknowhow.org

Jlooney921, Aml984

medical equipment

Holds a standard scalpel bladed

openknowhow.org

Kuna wakati katika shughuli za kawaida inatokea bahati mbaya na simu ya mkononi inatumbukia kwenye maji na kulowa.

Recent advances in the use of plasmonic metamaterials to improve absorption of light in thin-film solar photovoltaic devices has created a d...

microsphere lithography

nanosphere lithography

materials processing

Where cloth material is readily available, fabric filtration is a simple method of improving water quality for developing nations. In countr...

affordable water filter

A Pour Flush Toilet is like a regular Flush Toilet except that instead of the water coming from the cistern above, it is poured in by the us...

pour flush toilet

With a modular setup, this device can be used as multiple tools in one. Main applications could be for people from third world countries whe...

Dfh95, Lonny, SaraS

For our final project we rebuilt a greywater system at the CSA, Arcata Educational Farm. Greywater consists of all used water produced at a ...

constructed wetlands

Respiratory diseases pose an increasing socio-economic burden worldwide given their high prevalence and their elevated morbidity and mortali...

medical devices; low-cost; low- and middle-income countries; flowmeters; mechanical ventilator; cpap device; arduino; 3d printer; open-source hardware

This nutcracker is fully made with a 3D printer. Designed for high volume processing of a variety of nuts. Cracks many types of nuts, is han...

paper rocket launcher

science and physics fun class lessons

Julian Stirling

A mechanical tester which uses a welded frame, a number of 3D-printed parts, an Arduino, and a few other simple components. The tester is fo...

mechanical testing

quality controls

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

consumption demonstration

green education

visualize energy use

Woopwoop, Mitch212, Lonny

Mitch Girard and Hoon Peerless will be working in conjunction to research, design, test, and report on the use of biomass waste charcoal bri...

Compost is an integral part to permaculture farming. This page is an example of Chirapa Manta's method. The compost pile at Chirapa Manta re...

To hide and provide protection for cable junctions

openknowhow.org

This is a baseplate for a poultry feeder and waterer, which a gallon jug would be used as the hopper. This solution provides safe, short-ter...

The vermicomposting system (aka worm bin) at Finca Amrta in Costa Rica is simple, affordable and elegant. After much experimentation they ha...

This composting toilet is in use at New Dawn Herbalism School and Farm in Costa Rica.

composting toilets

water conservation

Replace this for an brief description of the project, its purpose, motivation, status, background, etc.

JonathanMMonterrosa, Anthony021lopez

Mdkoch84, Lonny

Welcome to the project page for the Oregon State University Student Sustainability Initiative. This page will act as a portal to all project...

sustainability organizations

united states organizations

Most people in the developing world are engaging in poverty alleviation projects such as small-scale farming (irrigation based), poultry and...

Kmnachbo, Crr31, Ibrahim, Alimorse

'Aquaculture is currently the fastest growing animal food production sector and will soon supply more than half of the world's seafood for h...

food production

sustainable agriculture

This page describes an apparatus to automatically rotate a solar reflector so it tracks the sun as it moves across the sky during the day. T...

telescope tracking motor

Floating photovoltaic (FPV) technology is gaining prominence as a means to alleviate land use conflicts while obtaining large solar PV deplo...

floating photovoltaic

closed-cell foams

sustainable development

Hand sanitizersW are becoming ubiquitous in the developed world, commonly found in public places such as shopping malls and waiting rooms. T...

3D printed bespoke parts to construct standard antenna design

openknowhow.org

Yanira Martínez Tobar, Jags

Con este proyecto buscamos fomentar un hábito de higiene en las personas que transitan las terminales de autobuses para ayudar a disminuir l...

estación de lavado de manos

handwashing station

ZelayaCeja, Aspen98, J.Stamm, Jacob Gomez, Mcm781

This project was presented to the group as a learning opportunity for the community through CCAT (Campus Center of Appropriate Technology). ...

charge controller

Open source appropriate technology (OSAT) refers to technologies that are designed in the same fashion as free [1] and open-source software....

Jacob Burns, Aj748, Aaa101, Nam78

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

la yuca project

rainwater catchment

Used to lock the door

openknowhow.org

Sodas and bottled drinks have probably the best Return on Investment of any legal business outside of pharma and alcohol. You can start a bo...

food preparation

herbal remedies

water purification

Proyecto Titi is the name of an environmental program centered in Colombia with a special focus on the conservation of a critically endanger...

cotton-top tamarin

Chloebb, Lonny, Tatimadriaga, Sophicimo10

Spring 2022, Cal Poly Humboldt, Engineering 305 Appropriate Technology students create a portable solar powered device. This is a consistent...

Replacement lever that compresses the lowering mechanism on dental chair

openknowhow.org

Raul, MarcelaGaldamez, Gerardo Flores, Sophialarios, Majohenriquez

El Innovitas Air Filter es una opción de primera mana dada la simplicidad de su construcción y bajos costos, para poder mantener limpios de ...

modelo de negocio

This is a list of the pages that are part of the project. Some editing and maintenance is needed. Contact User:Apepitone for more informatio...

alternative building

I carried out this project during one of my semesters where I designed a solar water heating system using Parabolic Trough Collector and Fre...

A wild berry picker is appropriate because it contributes to the zero hunger goal of appropriate technology in the way that it allows collec...

composting toilets

thermal insulation

water purification

energy efficiency

Esta página resume los resultados de una encuesta sobre veganismo en Argentina realizada online en Enero de 2022. Su objetivo es ayudar al m...

This is the developing systems plan for WHTC. This is a workboard so there may be duplicate information presented.

agricultural planning

residential housing

technology plan

Dana Martin, Jdklehr

Pedal power is a great way to teach kids how the energy they produce while riding a bike can be used to power entertaining electronic device...

renewable energy demonstration

Marcello, TheJLo

The cider press is an older technology that has been used for ages to make juices from fruit. The cider press enabled people to move from ma...

osat 3d-printable designs

Spreadsheets are often used for financial,economic or environmental analysis. These tips are especially helpful if used to make open source ...

Demotech (anna)

This article is about the Demotech kitchen unit for slum areas (DKUfSA).

solar hydrothermal demonstration

reclaimed materials

Bio-Pinturas es un proyecto basado en las pinturas naturales desarrolladas por unos estudiantes de la Universidad Estatal de Humboldt en Cal...

modelo de negocio

Generate your size wrench (parametric)

openknowhow.org

The XO laptop can only reach its full potential if it can be powered. In many of the areas that the XO laptop is being deployed, electrical ...

Provides a safe area for a child to play

openknowhow.org

JLaureto, C.Lahti, Gtholl, PALinBXL

This is a speculative class project and needs to be refined before being deployed at any scale. Photovoltaics are devices which convert ligh...

copper indium gallium selenide

photovoltaic cells

resource conservation

This fruit crusher project is designed for less developed countries that do not have access to the technology that other countries have. It ...

Andypreiksa, Bea14, Dustin.Poppendieck

Arcata Used Tire and Wheel (Figure 1) is a Mom and Pop company that will replace worn out wheels and tires with used wheels and tires. Like ...

The WindPod Turbine is a vertical axis wind turbine that uses the power of the wind to create energy which is then stored in the 12V battery...

renewable energy demonstration

environmental design

All modern vehicles have a center consol that can charge your electronic devices. This is all very convienient becuase everyone is always lo...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

One of the biggest hurdles in developing nations is locating locally sources and affordable parts and expendables, including filament for us...

filament extruder

plastic recycling

The Panya Project, a permaculture farm originally called the 'Baan Thai Project' was proposed in 2002 by Christian Shearer. Shearer, the cur...

permaculture projects

permaculture sites

This chain tensioner can be used to address issues with chain hopping, chain slap, and rattles. It can be printed and assembled for less tha...

bike chain tensioner

3D printed spike driven into the ground for holding a an object to the ground

openknowhow.org

There was a request to design a customizable shovel handle. A previous student designed one years ago and I was not impressed with the desig...

Download ECM now! This ECM details the economic and environmental savings generated by reducing electricity consumption associated with chan...

energy conservation measures

energy efficiency

energy star monitors

Mcm781, Lizkimbrough

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

renewable energy

charge controller

social sustainability

dc (direct current)

ac (alternating current)

backup generator

The GardenPool is a large run-down pool that was turned into an inexpensive & self-sufficient urban greenhouse. Self-sufficiency was achieve...

This is a Thermal Generator to charge a cell phone made for Engineering 371 at Cal Poly Humboldt

alternative phone charger

Lonny, Kladez3, Jamesvontersch, Viktorgarsia, Kat.miller

This page details a 3000 gallon rainwater catchment system designed and installed for Arcata Elementary School in Northern California in Spr...

The WaterPod will be collecting rainwater from a few of the impermeable roof areas. The calculations for collection are on this spreadsheet....

rainwater catchment

rainwater collection

rainwater calculations

Ndb21, Dylan.mcgurk, Dustin.Poppendieck

The purpose of this page is to inform the reader on retrofits done by RCEA (Redwood Coast Energy Authority) at the Hospice of Humboldt. Addi...

Kenia, Marianac, Isabela.rcorrea, Lonny, Klw573

Composting with worms, also known as vermicomposting, it is the process of transforming food waste and other organic residues into compost w...

The Athena 3D printer is a RepRap derived from the Most Delta Printer with the additional design goals: Even simpler assembly Perfect match...

A fork support is inserted in between the fork of a bike to help hold the suspension rigid during transportation the bike. If the suspension...

bike fork support

Raidlight / Skis Rossignol SAS

Sac gilet Responsiv Raidlight

githubusercontent.com

Spherical microphones arrays are commonly utilized for recording, analyzing and reproducing sound-fields. In the context of higher-order Amb...

open source hardware

spherical microphone array modular microphone

most completed projects and publications

osat 3d-printable designs

open source scientific hardware

This project is for the Growbot project by the Open Source Hardware Enterprise at Michigan Tech. The Growbot aims to provide an open source ...

Lonny, Jackie Zeibert, AV23, DrewRod

Designed and constructed in Spring of 2022, the low-power/high-value PV system was built to provide power to low-end medical equipment such ...

medical equipment

Was vorher eine Grusstelle in der Makombe-Heimstätte im Dorf Musipami war, ist jetzt ein florierender 100-Quadratmeter Garten von grün belau...

solar food dehydrator

Cal Poly Humboldt's Renewable Energy Student Union built a portable picohydro unit to demonstrate sustainable hydro power at a workshop they...

picohydro power

MelanieK, Hsugreen

This project is for greywater usage and may not meet clean drinking water standards. (not potable water) The Mattole Valley Community Center...

greywater storage and filtration

rainwater catchment

Suniljets, Boirac

This Project stems from the need of an Indian community in the state of Uttarakhand. A women's cooperative in the village of Ranikhet produc...

The solar kiosk is a charging station that has a 'Dual USB Power Charger' that has its own volt regulator inside and a volt regulator to con...

charging station

During the Spring semester of 2010, a group of four students (Team Energy-Caters) were assigned a twelve week long design project in the Eng...

Kbk7, Drb68, Dustin.Poppendieck

The purpose of this Appropedia page is to show how the Redwood Region Economic Development Commission saved on their electrical bill as a re...

This hand powered machine is a food processing tool that will grind peanuts down so they can be made into peanut butter. There aren't many 3...

kitchen appliance

Ampringl, Canitz, Zidico

Quantum dots (QD) are nanoparticles comprised of semiconductor materials, which exhibit enhanced electronic properties over bulk materials. ...

c (nanotube sw)

cdse/zns core/shell amine coated quantum dot

pbs/cds core/shell amine coated quantum dot

This is a cotton to yarn maker. Also known as Indian charkha. Cotton obtained from the farm can be extracted into yarn with this tool. origi...

The Raspberry Pi is an affordable computing solution, with the Raspberry Pi 3 Model B, power supply, and MicroSD card for OS costing a total...

raspberry pi case modification

The Icarus project is a multi-disciplinary project working on an absorption power system for highly efficient power generation from low temp...

power generation

energy generation

Steven Covey's stuff is about developing 'habits' that can make us more effective in whatever life-goals we are trying to achieve. A lot of ...

This page should contain more details. Hopefully there is some more content in that willd has access to. Maybe we can ask Dan (dan_retzyahoo...

composting toilets

plastic retrofit

So you've got a window, it's cold outside and the cold is creeping inside.

energy efficiency

heating and cooling

Gas turbines, as with all areas of power production, are highly dependent on thermal efficiency to effectively produce power. There are seve...

materials processing

thermal efficiency

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Demotech (anna), Bnansel

Sheet metal is often available as scrap from car wrecks, roof sheets, and the better parts of rusted-through oil drums. There is much local ...

Ryan.Mack, Ryan Noone, Dustin.Poppendieck

Japhy's is a soup restaurant. Japhy's is located at 1563 G St., Arcata, CA and run by Miwa and Josh Solomon. With the guidance of the Redwoo...

The goal of this project is to create an open source solution to automate the chemical maintenance of a residential pool.

The Black Mamba bicycle is commonly found in Africa. The overall goal of this project is to make open source models of as many bicycle part...

There have been many efforts to achieve affordable housing throughout history and throughout the world. This page looks at significant movem...

housing affordability

The Open Source Hardware Enterprise from Michigan Technological University is working on a Lasersaur. The goal of this project is to rebuil...

This equipment can be used to sow seeds with relative ease, compared to hand sowing. This product was designed for minimum number of parts a...

The biochar stove at Rancho Mastatal is used to create biochar and cook food. Biochar can be used to improve soil fertility while also seque...

travel internships

permaculture techniques

JonBaer, SamThall

This page lists different home energy retrofits that can improve energy efficiency in standard US homes. Many people in the United States li...

climate change gallery

Codywright, Bobdillman, Akr57

Bob and Cody have modified the off-grid photovoltaic system at the Arcata Educational Farm. The system previously in place consisted of the ...

photovoltaic system

arcata educational farm

charge controller

A handy device for use in kitchen.

Matthew Arnaouti

Trauma is the largest cause of non-obstetric morbidity and mortality in pregnant women. Significant trauma complicates 6-7% of pregnancies.

An adobe rocket stove cooks many of the meals at Rancho Mastatal. The rocket stove was built using the justa stove design. Rocket stoves are...

travel internships

earthen construction

improved cook stoves

Jo787, Sarah Morton, Leabethmae88

This page represents 'Team Biopod,' the solar dehydration group for Flock House. This group has been brought together through the Cal Poly H...

food dehydrator

solar dehydrating

Le kiosque solaire est une station de charge dotée d'un 'Dual USB Power Charger' qui possède son propre régulateur de volt à l'intérieur et ...

charging station

Jhinojosa, Jgg157, David R, Imjill4

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

solar charging station

renewable energy demonstration

renewable energy

solar charge controller

Fire is a crucial element when surviving in the wilderness. It is a source of light, warmth, protection and give one the ability to prepare ...

bow and hand drill

Protects occupant from sun light and rain

openknowhow.org

Srschroc, Lacarste

This ankle brace is designed to be stronger and more versatile than other OS ankle braces available online. Most notably, this brace does no...

osat 3d-printable designs

This fixture is made to hold a 45x75x0.1mm microscope slide on the print bed of a 3-D printer to analyze the warping of prints. This is espe...

PazLebov, MikeGreenwood, DomT

The purpose of a cold box is to create a naturally controlled environment that provides short-term housing for fresh fruits and vegetables. ...

ccat active project

food and agriculture

food preserving

thermal insulation

heating and cooling

energy efficiency

El gallinero automatizado, que será utilizado por granjeros avícolas es una innovación en bajo costo, que tiene como objetivo principal ahor...

modelo de negocio

Drwilliedre, Acalcano12, Enomis3, Shshsh

The streets are not the most suitable habitat for animals to live in. Animals are especially vulnerable when they need rehabilitation, recov...

This project was to install a photovoltaic (PV) array with sufficient capacity to support all of the household demands, including a electric...

Maria Angelica Garcia, Lvh33, Jmhuber13

math and physics school lessons

crystal pendulum

Download ECM now! There is significant variability in the technical capabilities of many electronic devices, such as printers. Please note t...

energy conservation measures

energy efficiency

energy-efficient

My version of a sawdust toilet (as described in the Humanure Handbook) consists of a receptacle bucket, a removable toilet seat that slips i...

Coreyhustead, LMK392

These are the steps that our team The Trailer Park Boys used to construct our bicycle trailer. The components below include a wheel chair, a...

upcycling gallery

El mal uso del recurso hídrico es uno de los grandes problemas que se pueden observar en varios países en el mundo, aún más el como es infra...

modelo de negocio

In the undeveloped countries, there are large number in people who are engaged in labour work. They carry tonnes of weight everyday for wage...

Lepley189, Mcm781, DavidCary

Solar power could be collected on the moon. Many different beams of 12cm wavelength microwaves would deliver power to receivers at sites loc...

lunar solar power

power generation

Hose collar for output of a diesel water pump (3” OD) ) ,

openknowhow.org

Executive Summary: The 'XO Laptop,' from the 'One Laptop Per Child Foundation' is an inexpensive laptop intended to help children in develo...

Using local materials such as clay, recycled paper, river sand and straw a series of test brick were made by the Green Building class at CCA...

green construction

natural wall construction

alternative building

The following is a step by step guide to building a retained heat cooker that was designed for the purpose of the Jefferson Community Center...

retained heat cooker

Greenhouses extend growing seasons in upper latitudes to provide fresh, healthy food. Costs associated with carbon-emission-intensive natura...

waste heat recovery

cryptocurrency mining

technoeconomics

sustainable food

Nikibeckman, Corinne, Lonny

This page is for historical purposes. Please see CCAT greywater marsh (current) for up to date information on CCAT's greywater marsh.

fiberglass wire mesh

metal mesh screen

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

rainwater catchment

Imagine .... one shape that is capable of providing the most basic functions necessary for sustaining the lives of people caught up in natur...

Current market options used to pass a fibre from a vacuum environment to an ambient pressure environment use a complex, hermetically sealed,...

The Campus Center for Appropriate Technology, needed a way to shelter its vermiculture bins and Biodiesel refinery--but not just any buildin...

bamboo construction

alternative building

construction and materials

built environment

This page is the compilation of a research project in partnership between Engr308 Technology and the Environment (taught by Lonny Grafman) a...

embedded energy

embodied energy

life cycle analysis

North Korea is a totalitarian stalinist government headed by Kim Jong-il, which maintains control through strict governmental isolation and ...

A simple homebuilt drag harrow using modern S-tines and a cage roller. This unit was sized for use by a team of small donkeys. The goal was ...

Felicity Tepper, KVDP, Cgfoz, Beppe

This page contains a selection of recipes of homemade pest control solutions. Homemade pest control solutions focus on using plants, soaps, ...

organic farming

sodium bicarbonate

While walking around St Kilda, a bayside suburb of the vibrant, lively city of Melbourne, Australia, you may happened upon the Veg Out commu...

community garden

sustainable cities

For updated version see: Open-Source Three-Dimensional Printable Infant Clubfoot Brace Brace for the treating of infants with club foot. Cl...

club foot brace

Cikaub, Chrissy Kaub

This page outlines one possible method to expand the Athena printer with a heated bed that still allows for the addition of extuder fans and...

3d printer modification

athena heated bed

Following requirements of the Energy Policy Act of 2005, most U.S. states require utility companies to adopt interconnection and net meterin...

electric utility

distributed generation

energy production

heating and cooling

No1deerepower, Aaron C, Ttgibson1, Mjgardes

Cadmium Telluride (CdTe) photovoltaic modules consist of five primary layers. These layers, especially the CdTe layer, are applied using a v...

industrial ecology

cadmium telluride

energy efficiency

environmental philosophy

waste management

Attaches and seals a hose onto a fitting

openknowhow.org

Lonny, Antoniodroman

The goal of this page is to present the design, plans, implementation, maintenance and use of the the concessions cart stand made by group T...

Nandafranco, Pamelamelo, CamilaRibeiroMatos

Vertical Garden is a state-of-the-art vertical growing system that is an ecological nutrient recycling system. It's perfect for rooftops, pa...

vertical garden

Pasionek, Lmoperha, Cdjacobs, Nweinberg

Copper indium (di)selenide (CIS) is a semiconductor material composed of copper, indium, and selenium. CIS is one of the better material cho...

industrial ecology

copper indium (di)selenide

energy efficiency

environmental philosophy

waste management

WATER IN BUSUKUMA IS BOTH DIRTY AND SCARCE. The Water situation in busukuma needs adrastic improvement, rightnow, water only flows during th...

This OSAT is a digital mass balance with two outputs: Digital output for data logging capabilities, and an LCD display. This has value in se...

weight measurement

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Kwojcik, Asabet

Energy in a Cinch was created by team Aero at Cal Poly Humboldt for Engineering 215: Introduction to Design. This project uses windbelts in ...

renewable energy

Walk in the Woods is the The Tree Council's festival to encourage everyone to enjoy trees and woods across the UK. In May every year, commun...

A simplified means of using natural fibres to create a menstrual pad is described below. There are currently millions of women in developing...

DDuncan, Brl15, Vms14, Victoriamarie7789

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

energy generation

bicycle energy generator

voltage regulator

Fah44, Jabi10, Tarker12

gym class activities

physical education

Green chemistry , also known as sustainable chemistry, refers to environmentally friendly chemicals and processes that result in: reduced wa...

green chemistry

In 1993 Bart Orlando began his volunteer efforts at CCAT by receiving permission to pedal power the PA system used at a speech given by Davi...

electricity generation

This type of clip is found on a variety of items, most commonly backpacks, and work well. However, I have found that if you break one, it is...

The Emergency Solar Battery Box was created at the request of Appropedia. The objective of this project is to provide an affordable and reli...

When inside a building,it is difficult for firemen to stay in contact with the people outside. The pager makes possible.

openCCS is a wiki-style knowledge base for carbon capture and storage (CCS), located at globalccsinstitute.com/openccs. openCCS is a project...

sustainability wikis

carbon capture and storage

Ccs18, Kyle.stammerjohn, Lonny

How can an individual, especially in an urban setting, reclaim their water? Grey water filtration has become increasingly popular here in th...

greywater filtration

water purification

water treatment

Cew52, Curran, Ndb21, Annie.bartholomew

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

concrete rubble

The use of distributed solar photovoltaic (PV) systems is growing more common as solar energy conversion efficiencies increase while costs d...

photovolatic system

maximizing pv performance

Tetrapaks are almost universal over the whole planet. And, up 'til now, they have been very difficult to recycle. Each is made of a sandwich...

thermal insulation

energy efficiency

Rebasbury, Inesm, Christopherlogreco, Foster Smith

This page details the journey that Team Pelican took to design a solar powered fan system for Potawot Community Health Garden.

sustainable farm energy alternatives

LucasG, Bart2, Lonny

This Appropedia Web page is Dedicated to creating an appropriate technology emergency response to the catastrophe in Haiti. by Bart Orlando ...

emergency management

In many developing nations, there is a constant demand for medical supplies, which are not only sometimes small in quantity but are often ha...

Existential-Crisis

Arm injuries are a very common occurrence, especially with children and younger adults that are working in manual labor. In order to heal th...

3D printed spike driven into the ground for holding a an object to the ground

openknowhow.org

Lhalstrom, Tkukuk, Dustin.Poppendieck

The Redwood Coast Energy Authority(RCEA) worked in partnership with Pacific Gas and Electric Company(PG&E) to implement the Energy Watch 200...

CAN YOU WorKIT (shown in Figure 1) is an educational kit, designed in the Cal Poly Humboldt Engineering 215 class, targeting students at the...

educational kit

activity worksheet

energy conservation

energy efficiency

This project is a desktop menstrual cycle tracker, that one simply uses by moving the pointer as each day passes. In many countries and cult...

menstrual cycle tracker

osat 3d-printable designs

In many studies, scientists have determined methods of obtaining of Building-Integrated Photovoltaic (BIPV) potential as a function of the a...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

The Starter Box is a creative design of a mobile greenhouse. The design team, the Four Tall Redwoods, have designed and built the greenhouse...

sustainable farm energy alternatives

Source S. Mahalakshmi, Jeyanthinath Mayandi, Suresh Sagadevan, V. Ragavendran, K. Manikandan, S. Arumugam, J.M. Pearce, V. Venkatachalapath...

barium titanate

magnetic materials

Kds20, Spiderwick chic22, Jknapp, Iar13, Markdanielfarrell

The Greenhouse Rainwater Catchment System is introduced to CCAT through ENGR 305: Appropriate Technology. The purpose of the system is to su...

sustainable farm energy alternatives

ccat active project

Azad Zandi, Lonny

The Campus Center for Appropriate Technology (C.C.A.T.) has been around for over 30 years, promoting the practice and implementation of vari...

LaserSaur laser cutter motion components redesign and custom firmware: Open Source Hardware Enterprise of Michigan Technological University ...

bed preparation

Adjustabike is the concept of an open source build your own bike kit. It is made of standard aluminium tubes and custom attachments you can ...

githubusercontent.com

material efficiency

flexible design

Among the many issues facing sustainable technological development, dispersed and un-coordinated research, as well as poor communication and...

most completed projects and publications

appropriate technology

Lonny, GoodSignal

When I'm at Burning Man, I typically stay up until after sunrise. Then, knowing that I'll be doing the same all week, I want to get a good s...

A Urinal is only used for collecting urine. Urinals are generally for men, although Urinals for women have also been developed. Urinals for ...

waterless urinal

The A Frame is an A shaped structure made from wooden poles or thin metal poles that can be easily constructed and used to peg flat or grade...

soil conservation

water conservation

One of the top reasons for road accidents that result in injuries and deaths is the dozing off of drivers. In this study eye tracking using ...

computer vision

real-time monitoring

eye state detection

convolutional neural network

drowsiness detection algorithm

automobile safety

traffic fatalities

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

thermoelectric module

cooling machine

polymerised pyrrole

vanadium oxide nanobelts

A home energy audit is a tally of all of the heat and electricity use in your house. This describes an electrical energy audit, in which you...

Innovación comunitaria encontrada en la Comunidad Río Mar, del Puerto de la Libertad, La Libertad. Consiste en la utilización de un pañuelo ...

innovación comunitaria

CourtneyBrown, Djb489

The purpose of this project is to create an aquaponic system that produces food for up to three people who will be living on the WetLand bar...

aquaponics demonstration

elemental o2 pump

food and agriculture

appropriate technology

built environment

This page is about the 'Tour De Volts' project for the WaterPod from the Spring 2009 'Introduction to Design' class at Cal Poly Humboldt. We...

bicycle energy generator

bike trainer stand

Carrienoburden, Eiliana Esparza, Leticiabasa, Tirian, Saradtorres, Lonny

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

galvanized pipe

The pedal powered battery charger was designed and built by Bart Orlando at CCAT in 1996. It can be used to charge a 12v battery. The system...

electricity generation

There have been news reports on Gizmodo and IFL Science of an experiment in Shanghai using 3D printers to create housing. Construction is fa...

Three students, Tony, Tyler, Devan, and their mentor Bart , as a school project for Cal Poly Humboldt, collaborated to design and build a ho...

Gar25, Arh76, Dustin.Poppendieck

The Redwood Coast Energy Authority (RCEA) is an organization that improves energy efficiency and reduces the use of energy at businesses in ...

Solar water decontamination system is a water purification system at household level based on solar radiation treatment and water distillati...

water decontaminating

JeffrenRamos, JeffEvans

Life Cycle Assessment (LCA) in agriculture can identify areas of current practices that require improvement, such as water resource manageme...

life cycle analysis

Since the Marshall Plan was so successful in rebuilding Europe, the World Bank and USAID--together with hundreds of well-meaning NGOs--have ...

principles of development

poverty alleviation

Expanded microchannel heat exchanger: design, fabrication and preliminary experimental test This paper first reviews non-traditional heat ex...

energy conservation

heat exchangers

microchannel heat exchanger

energy efficiency

Ljp34, Ebolainurcola, Dfh95, Lonny

The Arcata Educational Farm has been operating as a CSA (Community-Supported Agriculture establishment) in Arcata, California since 1993. Th...

arcata educational farm

We have already built LifeTrac, the world's first, high performance, open source, multipurpose tractor.

open source design

Lucky7386, Ashleyward90, Lonny, Ajm74, Woopwoop, Lenalou6988, Zps4, MRL369

This is a research project in partnership between Engr308 Technology and the Environment and the barrio of La Yuca, Santo Domingo, Dominican...

sustainable buildings

green construction

Aliaksei Petsiuk

The given project is a part of Open Source Appropriate Technologies assignment, and it is designed to support visually-impaired people. As p...

assistive technology

visually impaired guide

Fresnel mirrors is a technology to concentrate light on a focus point. Then the concentrated rays of the sun can be used for different energ...

Project description can be found at To upload appropedia non-compliant files try Thingiverse. It is a place for you to share your digital d...

Ttg37, Jax.attack, Dcholter, Dmartin, Cspemberton

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

edible landscape

The Hexayurt is a design pattern for making simple six sided shelters which are like the Mongolian Yurt from a variety of common industrial ...

Newspaper Briquette Makers are used by a wide range of people. They are used by people in developed countries mainly to create fuel bricks f...

Pierce Mayville

As part of my high school pre-engineering class for our final assignment we had come up with a final design project. An old water heater was...

Dr. Parker within the ME-EM department at Michigan Tech University has had a need for components capable of adjusting the level at which the...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

pythagorean theorem demonstration

Akr57, Tsterrett, John p, Wsedawie, Jsalinas

Our project was to rebuild the Bayside Park Farm solar hot water heater that was disassembled during construction of the new dish washing/ve...

solar hot water

Thaddeus Waterman, Btwittbr, Armiko

Gallium arsenide (GaAs) is a semiconductor material that is used in a wide variety of applications ranging from circuits to solar cells. Sol...

industrial ecology

gallium arsenide

energy efficiency

environmental philosophy

waste management

Lvh33, Lonny, Umang, Gsb562, Srishti Malik

This project worked on social entrepreneurship opportunities in New Delhi through the development and commercialization of products made of ...

entrepreneurship

social entrepreneurship

upcycling gallery

AND INTO THE DYE POT (From BITTERSWEET, Volume II, No. 4, Summer 1975) by Melissa O'Kelley The beautiful scenery of the Ozarks has many flow...

Cch250, Msb334, Mch372

The WaterPod project based in New York city, consisting of a group of artist, decided to attempt to design, build, and have five people live...

soil free garden

Ncs51, Amin c137, Lonny

For the Spring 2021 semester of Engineering 535, Development Technology at Cal Poly Humboldt (HSU), we partnered with the U.S. Environmental...

air purification

indoor air pollution

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. See: Zhang ...

parametric automated filter

scientific experiments

filterwheel segments

filter brackets

optical switch flag

Rafael28escobar

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

One day, I saw a bunch of old tires used as a retaining wall and that got me thinking about what other uses old tires are good for. I had a ...

Meine Version einer Sägemehltoilette (wie im Humanure Handbook beschrieben) besteht aus einem Behältereimer, einem abnehmbaren Toilettensitz...

Ericblazek, Chriswaterguy

The purpose of this page is to provide a guide on how to make a simple water filter. Depending on your needs, you can choose between a 50 ga...

El Convenio sobre la Diversidad Biológica (CBD) es un instrumento internacional firmado en el ámbito de la Organización de las Naciones Unid...

derecho en la moda

The Ceiba lounge at Rancho Mastatal was built using various natural building techniques, including cob, wattle and daub, earthen plaster, ch...

travel internships

earthen construction

earthen plaster

bamboo construction

alternative building

wattle and daub

The U.S. electrical grid, the largest and most complex man-made system in the world, is highly vulnerable to three types of external threats...

most completed projects and publications

national security

distributed generation

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Garden Tool With Variable Heads. In third world countries it is necessary for people to cultivate their own food. Tools of good quality coul...

An otoscope is simple device used in the diagnosis of ear, nose, and throat diseases. It is essentially a magnification lens with a light an...

medical devices

The following instructions detail how to build the FOTD Carbon Footprint Wheel.

Carbon nanotubesW (CNT) have been placed at the forefront of materials technology since their discovery in the early 1990s. Extensive resear...

materials processing

Acs26, Melanie, AnaMari, Jthiller

This page contains information on passive solar designs from the Parras 2006 program.

appropriate technology files

travel internships

Sophia P, Jolo720

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Jasmine phillips, Lonny, Tanvi gulati, Anamika, A.e.s

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Riparian and in-river flood management measures. Rivers themselves can serve a flood management function by providing 'live storage.' The op...

water conservation

flood management

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Grow your school is a project created in 2017 by architecture studio Cincopatasalgato and engineering firm JEP Ingenieros for non-government...

appropiate tecnology

Fbalex, Cbcoutinho

The Seas of Change project models the process of global climate change melting polar ice caps and raising sea levels that will eventually co...

Matthew Arnaouti

The Secondary Survey is a head to toe and systems examination with the aim of identifying all injuries that have not been detected in the Pr...

Compost is a mixture of decaying organic materials (plants) that is used for to fertilize and condition land. Compost can be anything from a...

ccat active project

Using metamaterial absorbers, we have shown that metallic layers in the absorbers do not necessarily constitute undesired resistive heating ...

metamaterial absorbers

exchanging ohmic losses

Natalia Ortiz, Heymivalladaresf, Eardon1, Adricortez 05

El objetivo general de nuestro proyecto es combatir la propagación del virus mediante la innovación, proveyendo medios accesibles de higiene...

This project is made for people who wish to pick unreachable fruit from trees. Forcing fruit out of a tree causes it to bruise and spoil qui...

right now, the project has been canceled due to regulations and liability issues with placing a body of water on state property (Cal Poly Hu...

Der Solarkiosk ist eine Ladestation mit einem „Dual USB Power Charger', der über einen eigenen Spannungsregler verfügt, und einen Spannungsr...

charging station

Maxosofsky, Trippsmith.rsr, Sarahcooper, Calfisch

As a part of a much larger storm water treatment system at Potawot, the storm water treatment pond treats 100 percent of the water that is c...

stormwater treatment

Provided additional storge and comfort

openknowhow.org

Sustainable Incremental Construction Unit (SICU) is a process-oriented building prototype that also deals with participatory design to be do...

green construction

alternative building

sustainable linving

Sequatchie Valley Institute is a community in Sequatchie Valley, Tennessee, USA. It started as a homestead in 1971, when Carol, Johnny and t...

sustainable farm energy alternatives

This project was to replicate the already produced gravity light into the 3D Printed and open source world.

The energy used for conventional cooking comes from a variety of sources: wood, gas, oil, coal, electricity, etc. Though solar cooking seems...

parabolic solar cookers

versatile design

Esta es una descripción de proyecto. Este texto aparecerá en Google y otras páginas de búsqueda.

modelo de negocio

Priyanka Gharat

Vigyan Ashram has designed & developed a '1000 L Modular Grey Water System' for schools / small houses/ bungalows. Users of the manual will ...

grey water system

water recycling

This project will focus on methods to decrease turbidity in source water prior to treatment by solar water disinfection (SODIS). It is based...

JakeBegorre, Romello The Engineer

diy portable stage

performance and theater arts

PabloMenendez, Andres Esquivel

Este proyecto consiste en un dispositivo dispensador de alcohol en gel de uso rápido y seguro, ubicado en zonas con alto flujo de gente como...

handwashing station

This megaphone is OSAT appropriate because there are practical uses for such a device in developing countries. A few examples would be alert...

voice projection

zero electricity

Shs11, NicholasHoffman, J.Bautista

A Life Cycle Analysis (LCA) is a 'cradle to grave' analysis of a product. It is a way of looking at the total effects on the environment of ...

life cycle analysis

polymer recycling

Alexander Kutschera

It consists of modular test tube holding chambers, each with a low power monochromatic light-emitting diode, and a monolithic photodiode. A ...

githubusercontent.com

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Winnowing is a process to remove lighter particles of chaff, dirt, etc from grain and other products typically by throwing it into the air a...

Stanley, Krystal Ocean

We are taking Engr305 – Appropriate Technology at Cal Poly Humboldt. The project we have chosen is to design and build furniture made from c...

cardboard furniture

upcycling gallery

To accelerate scientific progress by advancing the spread of open access and free and open source software and hardware in academia, this st...

educational philosophy and theory

endowed professorships

open science open hardware

Alexandra Martínez, Kriscia

En el presente artículo se explicará el anteproyecto denominado 'Estaciones de lavado de manos en paradas de autobuses' realizado por estudi...

lavado de manos

OSAT 3D Printed Can Opener

Dye sensitized solar cells (DSSCs) have numerous advantages, but in order to use widespread industrial deployment we need to boost the power...

dye-sensitized solar cell

plasmonic photovoltaics

power conversion efficiency

surface plasmon resonance

multishaped ag nanoparticles

local field enhancement

materials processing

Rich.westcliffe

This is a biodigester built using commonly available IBC containers

biodigester system

toilet paper holder

This project was originally intended for the developing world to aid in farming and rapid planting. In america we have our large commercial ...

Twilkins 12, Thomas Premo, Bws184

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

ceanothus plant

crimson hino plant

For original PDF version click here

Evashiu, Aaekka

Lonny, David.Bloch, Cherhart, SamThall, Alex627, Pinkfreud, Did28, JonBaer, Chetjamgo, Jonesy19, Littleredshrub, GregPfotenhauer, Bwsurfer, Ccl181, Lukewager1, Dja10, JFh52

This is a research project in partnership between Engr308 Technology and the Environment and SCRAP Humboldt, during Fall 2012, to compare th...

Minha versão de um vaso sanitário de serragem (conforme descrito no Humanure Handbook) consiste em um balde receptáculo, um assento removíve...

The Zeer pot is a refrigeration device invented in Africa which operates by the principle of evaporative cooling. According to Science in Af...

heating and cooling

international development

appropriate technology

Zane Middle School waterfall gutter fix

The objective of this project was to create and implement a system that sealed the existing holes in the gutters of Zane Middle School and p...

This device is used to collect a small fecal sample for testing. This can range from DNA testing to testing for disease. Fecal matter can te...

Mrdamio, Rowan Damio

This page contains the documentation for my Engr305 appropriate technology class project. The project is to build a working model of a Pulse...

Metamorphyr, Spescitelli, DanielHughes, Jghoul, Fr244

The goal of our project was to build a retaining wall with a culinary herb garden for the Campus Center for Appropriate Technology (CCAT) on...

tire retaining walls

earthship construction

ccat active project

Download ECM now! Bulbs for fluorescent light fixtures come in various guises, but two common versions are the T12 and T8. In these names, t...

energy conservation measures

energy efficiency

linear fluorescent retrofit

DESIGN NOT FULLY FUNCTIONAL-- use instead RepRapable Recyclebot: Open source 3-D printable extruder for converting plastic to 3-D printing f...

filament extruder

This webpage is about the 'Papercrete Wall' Project from Engr 215 Spring 2010. The objective of this project is to design and build a rigid,...

This is a parametric FreeCAD model that can be adapted to a variety of threaded or unthreaded pharmaceutical pill/medication bottles. This w...

pill bottle caps

Big Russ, Aaron

Yurt. Humboldt County is rainy in the winter and spring, so designing to withstand weather has been a front-and-center challenge. In the Fal...

alternative building

The Rag Doll Thermal Curtain Display The objective of this project is to educate people about Energy conservation. This will be accomplished...

energy efficiency

heating and cooling

Make simple and easy soil blocks for starting seeds.

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

The project documented here consists of three parts, which will ultimately be documented separately but which are presently going to be in o...

KyleEbert, Abood, Kgo31

Problem being addressed: Many standard wheelchairs are not suitable for long distance travel over rough terrain, and those that can withstan...

Michael Gathogo

Replacement 3D printed centrifuge tube holders

openknowhow.org

This manual describes the design and construction of a device which, when attached to a standard bicycle, will permit it to be used as a ped...

Ampringl, Bahram

This literature review is meant to provide an understanding of the usefulness and properties of perovskites as a material for 3D printing so...

Plasmonic silver nanoparticles loaded strontium titanate nanocomposites (Ag-SrTiO3 NC) with diverse weight percentages (0.5, 1.5, 2.5 and 5 ...

plasmonic nanocomposites

dye-sensitized solar cell

plasmonic photovoltaics

power conversion efficiency

materials processing

Jdr384, Valerie, Nsvoma7

CCAT (Campus Center for Appropriate Technology) is an appropriate technology demonstration house on the Cal Poly Humboldt campus in Arcata, ...

Este proyecto consistió en la creación de una instalación para enseñar sobre el uso de herramientas de fabricacion digital en la comunidad a...

digital fabrication

A tile leveling system to reduce tile lip when installing large format tiles. These types of systems are very common when installing larger ...

LBeutler, Ejumlor

The Open Source Hardware Enterprise from Michigan Technological University is working on the DEXTER robot arm project. It is sponsored by Ge...

The Spider Boot Foot Protection System is a truly revolutionary design for protecting a deminer's feet and legs against blast-type anti-pers...

protective clothing

appropriate technology

Felicity Tepper, Chriswaterguy

Earthquake safety begins before the earthquake. Proper construction and personal preparation will help you to be ready.

The Pedal Powered Washing Machine.

electricity generation

The following is a list of goals, test procedures, equipment needed, and goals for testing synthesized components of rainwater harvesting sy...

project testing

C Blair, K.laciak

rapman protocol

This zero-electricity fridge addresses the issue of people in third world countries not having electricity. They go to markets and buy food ...

zero electricity refrigerator

Erc17, D.a.gray, Emily Curtis

The purpose of this wiki site is to review the relevant literature of the LCA of food (Figure 1). Life cycle assessment (LCA) methodology pr...

life cycle analysis

An inverter converts Direct Current (DC) electricity from a battery, wind or solar source into Alternating Current (AC)

alternating current

This project aims to use plastic bottles, glass bottles, aluminum cans and other recycled materials for construction of buildings. It is a p...

plastic bottles

recycled materials

Aibsen40, Bmr81, Jmc1238, Cep42

The objective for this project is to build a small local pharmacy (Botica Popular) for the people of Las Malvinas, which will provide basic ...

green construction

medical supplies

plastic bottle insulation

plastic bottles

There are a few composting toilets at Haiti Communitere. The image to the right is of an Ubuntu Blox composting toilet made with support fro...

travel internships

alternative building

composting toilets

The Singapore Green Plan 2012 is a outline overseen by the Singaporean Ministry of The Environment and Water Resources, for reaching environ...

Michael Weinberg

A raspberry pi-powered display for tracking NYC subway trains

githubusercontent.com

Ph.D. scientists and engineers are highly qualified personnel (HQP) that improve U.S. economic efficiency and generate new products includin...

most completed projects and publications

counter intelligence

highly qualified personnel

national security

When money is hard to come by and other tools take priority, a tool that makes a corner at a 90 degree angle is usually not high on the list...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

MikeChenaille, Fbalex, BethEschenbach

The Humboldt Energy Independence Fund (HEIF) received a proposal written by the Renewable Energy Student Union (RESU) in the spring of 2008 ...

Jeffrey novoa, AdamWebster, Dustin.Poppendieck

The Coast Central Credit Union is a financial institution in Eureka and the surrounding with 19 ATMS and 11 member service branches througho...

Sparr, Fionaconnor

fidget desk toys

classroom focusing

fidget spinners

video game controller

resistance band

Executive Summary of Project: One Laptop Per Child (OLPC), a non-profit organization, has been distributing XO-laptops to children in third...

Abolfazl Taherzadeh Fini

The Watercone® is a solar powered water desalinator. It is claimed to be simple to use, lightweight, mobile and it is designed to produce 1....

water purification

solar distillation

open source design

Many people in 3rd World countries do not have access to stores like Walmart or Target where they can purchase necessary items. One of the i...

Shamo, Mokrauer

Teammates from Guatemala, Honduras, Tibet, and Zambia are collaborating on an income generating project that has applications all over the w...

interlocking blocks

Mmd63, Tahsa.Sturgis, BethEschenbach

The purpose of this page is to explain how retrofits made to a building at Cal Poly Humboldt(HSU) located on B St between Laurel and 17th St...

passive solar heating

Seabin consiste en un innovador basurero flotante que succiona residuos y desechos del océano, como plástico, bolsas, botellas, latas, entre...

modelo sustentable de negocio

GoodSignal, Lonny

Greywater treatment system made from 55 gallon drums. This is, essentially, a five stage, activated sludge greywater system. The greywater i...

greywater system

constructed wetlands

The goal of this Cinematography Quadcopter is to create an open-source platform that can be used for aerial photography and cinematography a...

Spigots manufactured for self-attachment typically rely on large gaskets to maintain a seal, which works with varying success on the curved ...

This project describes the conversion of a treadle pump into a power generation device by a team from the International Development Design S...

This ground collector is based on the nut, golf ball, tennis ball, or fruit collectors that are on the market. Simply put, a rolling cage is...

ground collector

This project details an open-source colorimeter, which is made from open source electronics and 3-D printable components. This is part of a ...

open source scientific hardware

Tom van der Vaart

To measure body fat

openknowhow.org

The objective of this project is to design a charging cart for a 3D printer that is completely mobile, and runs solely on renewable energy.

mobile 3d printer

The ecoladrillo house at Haiti Communitere was built using old pallets, plastic bottles, and straw-bales. In one portion of the house plasti...

travel internships

alternative building

LittlRae, Anapuga, MikasaAckerman

Cal Poly Humboldt engineering students working with community groups to design, build and plant a system for growing potatoes above ground a...

vertical garden

solidarity economy

The Rainbow Hostel is located close to Golfito, Costa Rica. This forming community intends to serve as a learning center for social sustaina...

rainwater catchment

This is provided for information only. Please use caution when using any information, including from here. Appropedia cannot be liable for w...

emergency management

water sanitation

water purification

disaster preparedness

Meganhelms, Lonny

The use of a parabolic shape is not a new invention by any means. There has been used throughout the history of focusing the sun's rays for ...

This paper presents a novel design for the top contact of thin film photovoltaic (PV) solar cells. The new top contact is formed by fabricat...

honewcomb top contact

light absorption

series resistence

thin film solar cells

materials processing

This page shows: How to use a CCFL and electronic ballast out of an old SCSI document scanner and a fax machine Advantages and disadvantage...

cold cathode fluorescent lamps

3rd world arm lamp

electric lighting

Hierarchical 3D TiO2/g-C3N5 (T-CN) nanocomposites were synthesized for the first time to investigate its potential in environmental applicat...

hierarchical tio<sub>2</sub>/g-c<sub>3</sub>n<sub>5</sub>

photocatalytic degradation

z-scheme charge transfer

anti-bacterial activity

Sofialopez, Camilagav, Kelly, Alejandra Rogel

La utilización de agua de lluvia para lavar los vehículos en los carwash es un proyecto sostenible que tiene como objetivo ofrecer una innov...

modelo de negocio

Fiona Roper, Alb26, Lyarbrou

The purpose of this project is to create up-cycled benches used for sitting purposes, campus beautification, and for educating both students...

JLaureto, Tjmahan, Snuchitp

Current iteration unstable - move to multiple legs,wheels weak points on velcro attach too much materials in non-stress points -- not enough...

There are many books available for those entrepreneurs who would like to build their own fuel cell economically. This website shows you how ...

Normally PCB Heated Bed draws about 10 amps of current. We need a lot of power and a big power supply for that, which is a big problem in 3-...

3d printer modification

adjustable heated bed

hydrochloric acid

hydrogen peroxide

This is a pen that will hold charcoal for an artist to use. From what I found in my research there aren't many holders out there for pens an...

charcoal pen holder

osat 3d-printable designs

Abhijeet, Apatil6

Rainwater harvesting is one of the efficient ways of utilizing rain water for household purposes. Many of the underdeveloped and developing ...

rain water harvesting

water purification

Hacer y mantener una huerta puede ser trabajoso. Por lo tanto, conviene tomar ciertas decisiones para optimizar el uso de nuestro tiempo, re...

vegetable garden

The Peruvian government has asked the World Bank to aid, through loans and management, the development of a better transportation infrastruc...

Abigail, Lupine, Lonny

I have always been curious about working with natural building and earthen materials. Then as fate would have it I was given the opportunity...

earthen plaster

natural building

earthen construction

With recent destruction of coral reefs due to marine pollution, there are movements within marine biology for conservation efforts of coral....

All living roofs encompass a growing medium and vegetation into their design. They also need to encompass a water proof barrier and sometime...

The use of 3D printing in developing countries to replace broken or warn parts is greatly beneficial. The low cost printing can be differenc...

The following is a list of parameters for testing rainwater quality at The Laboratory of Community Alternative Technologies at Ajusco in con...

project testing

CLASS PROJECTS FOR HSU STUDENTS ENROLLED IN APPROPRIATE TECHNOLOGY-ENGINEERING 305 SPRING SEMESTER 2020.

LynetteVillagomez, Elizabethg1990, Dustin.Poppendieck

The purpose of this page is to present an analysis of the effectiveness of the Redwood Coast Energy Authority (RCEA) lighting retrofit perfo...

La conception de la plupart des systèmes de biogaz peut être attribuée soit au China Fixed Dome (CFD) avec plus de 6 millions de systèmes en...

renewable energy

Lam114, C.spassoff, LL Joule J

Encircled by the Gathering Room and the main offices at Potawot, the Wellness Garden (Header) is filled with various native plants from the ...

Soft actuators have grown to be a topic of great scientific interest. As the fabrication of soft actuators with conventional microfabricatio...

mechanical testing

mechanical properties

open-source platform

magnetic nanoparticles

magnetic soft actuators

most literature reviews

Matthew Arnaouti

Lonny, Chriswaterguy

The Global Health Medical Device Compendium is an inventory of medical devices designed for use and/or implemented within resource-limited s...

This is an improvement of a previous hammer design, which can be found here For the purpose of being an open source appropriate technology,...

Construction manual of an animal-driven plough Equipment designed and manufactured in Haiti by the Camp Perrin Workshops-schools Developed i...

tool construction manuals

agricultural tool construction manuals

isf-iai documents

Dshelswell, Rejoicingapathy, Kmcdade

See the talk page for this article: 'nice start, but doesn't look like Permaculture yet.' A better permaculture introduction is needed for t...

permaculture techniques

urban agriculture

This project is to build a barn for Tule Fog Farm in Arcata, California, while at the same time converting a brownfield into a productive sp...

This is the Operation and Maintenance (O&M) manual for CCAT rain water catchment drip irrigation system. Please refer to it and keep it up t...

ccat active project

In Gaia's Garden by Toby Hemenway, the White Oak guild is described in detail.

I am living and working in O'ahu cultivating plants and learning about native agriculture. I am working with Kumuola Foundation in Manoa O'a...

Regardless of the risks involved, people do and will continue to live in the floodplain, both upstream and downstream from dams. And, as sci...

flood management

The following information is a demonstration of personal experience gained from two years of working at the Arcata Educational Farm. The Arc...

organic farming

plant propagation

bed preparation

soil management

garden planning

Many different types of vehicles, including boats, cars, vans, and campers have a world-standard power socket on the dashboard. It is possib...

cigarette lighter socket

cigar lighter receptacle

dc power connector

Cool Guy Micah, Aidan WIlson, Ethan Appro

The objective for this project was to create a viable bicycle-based product that can produce renewable energy by pedaling, which can be stor...

Seyyed Ali Sadat

University of Kashan introduced this project and Seyyed Ali Sadat was the senior researcher in this work.

photovoltaic energy

barriers recognition

identify solutions

foliage coverage

Zar54, Aac378, Ama973

rainwater drainage

A complete force analysis of a simple plank ramp was conducted in order to determine the forces, stresses and moments acting on it. From the...

health and safety

mobility and rehabilitation

Michael Gathogo

A device used to obtain information about a fetus within the uterus

openknowhow.org

Cheyenne Celada, Elisabeth.dejong, Gmp171, Mwaterstone, Ceu4, Jacob, Jash626

The Cal Poly Humboldt Campus Center for Appropriate Technology (CCAT) is a hub for student experimentation with Appropriate Technologies and...

green construction

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

An easy-to-use, highly customizable, and open source syringe pump and microscope system.

githubusercontent.com

The corner restraint is a simple design that can be easily changed through it's FreeCAD file and it is designed to be printed without the us...

The documentary film ObjectifiedW is all about how we, in the past decades, have 'objectified' our lives. It's about what genuinely good des...

Source: Chinchane, S., Kadam, H., Mowade, K., & Pearce, JM. 2022. Open Source 3D Printed ISO 8655 Compliant Multichannel Pipette. Journal of...

open source hardware

additive manufacturing

distributed manufacturing

laboratory equipment

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

c1-4 (capacitor)

tab car controller (2 amp)

pololu stepper controller

standard lab diodes

blade fuse holder

Recent work has proposed that hybridization of residential-scale cogeneration with roof-mounted solar PV (photovoltaic) arrays can increase ...

pv-cogen hybrid systems

distributed systems

energy production

heating and cooling

Lonny, Max Mather, SayraM

The Tornado exhibit was a project done by four environmental resource engineering students at Cal Poly Humboldt in the Fall of 2022 over twe...

science education

Kellan Martin, D.S.Freiberg

This is a speculative class project and needs to be refined before being deployed at any scale. A Pacemaker is a surgically implanted batte...

Lonny, E.lecron

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

floating food forest

urban agriculture

Rain gutters are installed on buildings to catch rain water and direct it to a specific location. The most critical use of this water is for...

rainwater catchment

built environment

construction and materials

KVDP, Chriswaterguy

This article discusses the nursing of plants, which means taking care for plants from when they are seed to when they a few months-1 year ol...

When bowfishing, the archer will be presented with various shooting angles. These angles may require the archer to tip and lean the bow in s...

Ajmcquar, Shaneamtu, Kmwhalen

For the manufacturing of quantum dot LED (QLED) displays, the quantum dots will have been created prior to 3D printing. The quantum dots wil...

Humboldt County, in partnership with College of the Redwoods and the California Conservation Corps, provides free green building training an...

Project goal: Create a cheap and customizable light for anyone to make and use. This is a much safer way to light dark areas then a gas lamp...

gas lamp alternative

battey connector

This page describes an adaptation of the Semi-Folding Hexayurt design to the Pentayurt aka H10. If you have not done so, read Camp Danger He...

The goal of this project is to create an open source cellulose insulation manufacturing machine for the goal of local production of cellulos...

cellulose insulation

HowardMech425, Onesojourner, Fionaconnor

Our project for ENGR 114 was to build a rainwater catchment system around the yurt at CCAT on campus at Cal Poly Humboldt. The purpose of th...

rainwater catchment

55 gallons tank

Krischnappa ist Landwirt eines kleinflächigen Betriebs in einem der ländlichen Bezirke von der südindischen Staat Karnataka. Im April 2006 b...

With two small printed parts and two springs, my corn crusher can do what its name implies: crush corn. This device is supposed to replace t...

This is the Operation and Maintenance (O&M) manual for CCAT mobile energy operations wagon (MEOW). Please refer to it and keep it up to date...

ccat active project

ccat pedal powered innovations

One way to improve the productivity of a solar still is to pour cooling water over the glass cover. My hypothesis was that pouring water ove...

solar distillation

water purification

Instructions for Making a Nut Sheller

Avm7, AnaMari, Tressie, Soysinlimites, Lonny

This 10 week project is a combination of social service and a comprehensive experience with natural building. The final goal of this project...

adobe construction

Brandonls89, Dcolvin, BethEschenbach

This is the Operation and Maintenance (O&M) manual for CCAT greenshed cordwood wall. Please refer to it and keep it up to date with any O&M ...

ccat active project

alternative building

Cailan, Curran, BethEschenbach

This page provides information on the Forbes Complex cogeneration unit connected to the Joseph M. Forbes Physical Education Complex, located...

energy production

heating and cooling

The primary goal of this Appropriate Technology project is to consolidate existing information on solar cooking, as well as evaluate materia...

thermoelectric module

cooler experiment

Tre18, Dane.Noland, Anali24, Ab290

Engineers Without Borders USA (EWB-USA) is a non-profit organization seeking to 'build a better world through engineering projects that empo...

water distrubution

The solar photovoltaic industry in Ontario and around the world is growing at an unprecedented rate, creating the jobs that underpin a green...

open solar outdoors

open source design

solar photovolatic

Strips of plastic from a soda bottle can be used to lash poles together, and if you hit the lashing with a heat gun, then it shrinks a littl...

upcycling gallery

O quiosque solar é uma estação de carregamento que possui um 'carregador de alimentação USB duplo' que possui seu próprio regulador de volts...

charging station

On the 3rd world arm lamp advantages link you have some information what kind of tools an material you need to make the arm-stand.

We are iving in a world with an ever increasing human population. This is increasingly putting stress on the limited resources available to...

rainwater catchment

Mrc55, Galen, Scm48

The Samoa Hostel is a joint effort of DANCO and the Humboldt Bay Center for Sustainable Living. Their goal is to incorporate sustainable liv...

thermal insulation

energy efficiency

heating and cooling

This document gives schematic drawings of the assembly and operation of a wind powered water pump. The drawings are accompanied by a list of...

renewable energy

appropriate technology

Rodrigocaceres, Gerson Gómez, Carlos Hernández

La escasez de agua es un grave problema que afecta al 40% de la población mundial. Algunos expertos afirman que esta situación podría genera...

modelo de negocio

Katie.harris, Dtp145

Three opaque buckets are 'nested' inside of each other. 1/4 inch holes are drilled in the bottom and around the lip of the top two for venti...

Cep42, Shalyn89, Joce.westcoast, Arieloc, Ers66, Lg137, Ams202

The objective is to construct a classroom that will hold approximately 25 students under the age of 10. The classroom will be constructed us...

portland cement

Bobdillman, Codywright

UTC in Mexico built a Solar Learning Station with help and instruction from Lonny. We have constructed a local version of the learning stati...

solar learning station

solar charge controller/monitor

agm (absorbed glass mat) sealed battery

circuit breakers

dc disconnects/switches

This is a review of basin solar stills, they have been deployed by several groups and studied see Solar stills for more information.

solar distillation

health and safety

Concept design for syringe pump; non-functional

Rose, Charlesricci1, Lonny, Ramirez alexa

The CCAT Small Pond Revitalization project has been inducted into Cal Poly Humboldt's Engineering 305 class in order to provide the surround...

David Brown, Mcm781

The WAPI (Water Pasteurization Indicator) is a reusable, inexpensive thermometer employing a plug of soybean wax which melts at 68˚C, just a...

water pasteurization

clear plastic tube

water purification

The pocket wrench is an excellent example of OSAT. Wrenches are a universal necessity, especially in third world countries where buying some...

The OpenFlexure Microscope is a 3D printable microscope, including a precise mechanical stage to move the sample and focus the optics. The...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

appropriate technology

Update to Changeable Garden Tool Heads. A few students from previous classes created smart and creative tools that could be used anywhere in...

garden tool heads

Oag3, Carrienoburden, Lonny

En el 2006 la Universidad Autónoma de Benito Juárez en Oaxaca, Mexico (UABJO) implemento: un sistema natural de tratamiento de aguas residua...

aguas residuales

Replacement plastic switch for medical device

openknowhow.org

Su sistema fotovoltáico produce electricidad del sol. La batería almacena alguna energía, pero si no hay sol, habrá menos electricidad para ...

solar electric system

'A lack of adequate footwear is more than a simple inconvenience or lack of comfort. Millions are infected or dying each year due to the spr...

It is possible to use two parabolic troughs, curved in perpendicular directions, to bring sunlight to a point focus as does a paraboloidal r...

TheRealSlimShady

The idea behind this OSAT is very simple and nothing groundbreaking. A simple tent stake. To some it may not seem important or essential in ...

Cf904, Raiza.tinoco, Sjhawkins1, Fr244

This project seeks to plan and implement a rainwater catchment system on the rooftop of one of the buildings of the Bayside Park Farm (Figur...

Shubhamrjain, Fionaconnor

This Laser Engraver mod on the Athena II printer will allow you to engrave various designs on cardboard and/or wooden surfaces (acrylic mate...

3d printer modification

borosilicate glass

converter step down module

Tom van der Vaart

Provides a straightedge at a 90 or 45 angles to a baseline

openknowhow.org

Akr57, Humboldt Chris, Lonny, Giusseppe, Varredondo, APenny6, Jayres, Shshsh, Jax Do4, Bhopkins, A Stack0verflow, Calfisch, Gia3, Athenav

This is a research project in partnership between Engr308 Technology and the Environment and the Fuente Nueva charter school, during Fall 20...

Reindeer Husbandry Applications require use of snowmobiles to get around in the tundra like conditions of Russia. Hand guards are often used...

snowmobile parts

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

consumption demonstration

human powered blender

Achannel, Ryankriken, Greennow

The Integral Fast Reactor (IFR) is a fast nuclear power reactor design developed from 1984 to 1994. The design includes both a new reactor a...

As low-cost desktop 3D printing is now dominated by free and open source self-replicating rapid prototype (RepRap) derivatives, there is an ...

heat exchangers

This is the Operation and Maintenance (O&M) Schedule for Long Term Maintenance at CCAT. Please refer to it and keep it up to date with any O...

ccat active project

long term maintenance

In 2011 an ecoladrillo schoolroom was built as an additional room to Escuela Basica Nurys Zarzuela in La Yuca, del Naco, Santo Domingo, Domi...

earthen construction

Callooh is a free hardware CNC router project, intending to be comparable to the Roland Modella in accuracy and ability, but far cheaper and...

Jmk97, Kara M, Grn7

Carrienoburden, Jwillsen, Phoebe.sager, MRL369, A Stack0verflow

Appropriate building techniques try to do more good than harm by using local knowledge and resources, with lower embedded energy, to create ...

straw clay slip

ccat green shed

ccat active project

Bcr8, Ct89, Dustin.Poppendieck

Sequoia Humane Society (Figure 1) is a non-profit animal shelter dedicated to animal welfare. In 2007 the Redwood Coast Energy Authority (RC...

Myles, Shantown1, Greennow, Pjl11

Myles Danforth, Shannon Townsend, Paul Danenberg, Jon Mitscha and Phil Lucas, performed an analysis on the photovoltaic system at Campus Cen...

Kevin Burks, Nah33

Senior Environmental Science Majors Nick Hurn and Kevin Burks are creating a small parabolic mirror cooker to demonstrate the wide uses of a...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Student-Powered Rec Center Project is to determine the amount of electricity that could be produced at the Student Rec Center at Cal Poly Hu...

cardio-vascular

cardio-vascular stationary machines

student-powered

renewable energy

renewable energy demonstration

Recently several algorithms have been developed to calculate the solar photovoltaic (PV) potential on the basis of 2.5D raster data that can...

solar photovolatic potential

Parabolic solar cookers are designed to utilize the sun's vast supply of energy to do what we all need to do from time to time, cook food! I...

mirrored aluminum sheets

Wolves are a problem with reindeer husbandry. This 3D-printed ultrasonic whistle is a cheap method to be used as a wolf preventative. As pro...

ultrasonic whistle

Our household of 2 adults and three children obtained all our household hot water from a composting greenhouse we constructed in Portland, O...

Alexander Kutschera

Here we work on the development of software tools and a low-cost open hardware setup to study how bacteria move.

githubusercontent.com

This page lays out the steps required to convert your current Delta Athena II printer to reduce the rattling of the connecting rods during p...

3d printer modification

This simple device not only saves hours of painstaking labor, but also increases the viability of the nut as a cash crop. To achieve the goa...

crochet needles

Big Money Project. This is a pineapple self-watering planter remixed with FreeCAD. It was taken from an original pineapple planter created b...

Open-source, self-replicating rapid prototypers (RepRaps) have radically reduced the costs of three-dimensional (3D) printing while expandin...

foot abduction orthosis

distributed manufacturing

additive manufacturing

medical devices

For an up to date, tested and peer-reviewed version see: 3-D printing open-source click-MUAC bands for identification of malnutrition Mid U...

severe acute malnutrition

mid upper arm circumference

child mortality

This article is based on an Ashden Awards case study of Fruits of the Nile, who won an Ashden Award for their work in 2008.

solar dehydrating

With <200mm of rainfall, saltwater infiltrated wells and expensive oil-guzzling desalination plants as the main source of fresh water in Cap...

concrete panels

Treadle Pumps are widely used globally -- need to tie design to those that have been further developed. The treadle is a very simple design ...

A wind turbine bade.

electric lighting

The project was offered from Dr. John Gershenson, part of his lab for measurements.

Al 'Bokashiman' from a guerilla gardening group led a seedball-making workshop. It is satisfying to get your hands muddy and spend a couple ...

urban agriculture

This project was intended to remove soldering fumes from the air. Recent articles suggest that fumes may also be a result of 3D printing, so...

voltage regulator

En respuesta a la apremiante situación hídrica que afronta El Salvador, el sistema Smart Water surge como una propuesta de innovación que bu...

modelo de negocio

There is a very large need for an affordable and strong plastic grinder. With current models on the market that are made from steel and requ...

plastic grinder

RyanVicente, Jamason, BrettWS, KalleP

This is a review of the available literature pertinent to a life cycle analysis (LCA) of standard and rechargeable closed cell batteries. Th...

life cycle analysis

Krishnappa is a small farmer in a rural district of the south Indian state of Karnataka. In April 2006, he received assistance from a USAID-...

To be practical this must be scaled up

Burnjessh, Andrea, Gcf5

This was a project started by students in the Whole Earth Engineering class at HSU. The main goal of the project was to fill a need using an...

bike powered washing machine

water catchment

recycled materials

La Compostera Plaza Castiglia es una compostera pública, creada y mantenida por vecinos voluntarios, con el apoyo de la Red de Compostaje, G...

Yeahvle, Chriswaterguy

People that live in undeveloped areas who have little to no Fuel, Electricity, Water, Food, are often highly creative individuals. They stru...

electric appliances

energy conservation

energy efficiency

food preparation

sustainable technology

Xjdax2001, Andrea, CoryBrinkman

The Campus Center for Appropriate Technology (CCAT) at Cal Poly Humboldt in Arcata, California is completely remodeling the inside of their ...

earthen construction

This page contains the details on the CCAT kiosk. The kiosk can be accessed anywhere online at: https://imagecompresser.com/fake-word-genera...

ccat active project

Julialibrera, Ginalabar, Gge2, Annie.bartholomew, Jeff Hinton

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

high density polypropylene biobolsa

Esta intervención consistió en la recuperación de un relleno sanitario en la Colonia Fátima, un vecindario pequeño parte del cantón Los Magu...

community design

Felicitous Friend, Jbancroft2012, Cd102

The objective of our project is to take organic waste including dog, cow, and horse excrement, as well as kitchen waste and recycle it. Meth...

diy biodigester

organic waste disposal

anaerobic digestion

A Cassava Press, or a general food press, is a tool used in many parts of the developing world for increasing the longevity of food by press...

carbon water filter

A device used to safely dispose of needles

openknowhow.org

Phantom power is the power consumed by electrical appliances when they are switched off or not in use, but remain plugged in to an electrica...

Matthew Arnaouti

Transporting patients entails risk. It requires good communication, planning and appropriate staffing. Any patient who requires transportati...

The Vertical Garden is a unique indoor/outdoor modular planter with multiple levels of vertically spaced pots/planters. Its superior vertica...

vertical garden

Hello, and welcome to our Spring 2013 Appropriate Technology project at Cal Poly Humboldt (HSU). Our team is comprised of Ivan Diankov and A...

This device collects rain water in a water bottle or any container that has standard bottle threads. It includes a purge container that coll...

rain water catchment

water bottle filter

water filtration

This is a fitting to allow other gases to be mixed into a nebulizer supply

openknowhow.org

Matthew Arnaouti

Trauma Triage refers to sorting of the injured patients according to their individual need for emergency medical treatment. This process pri...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

constructed wetlands

artificial wetland

A common problem is the lack of literature to support the gender dimensions and feminist viewpoints on research, teaching and innovations. H...

ArielOrtiz9, Victor Lopez, Josseline Avalos, Alejandro Velásquez, Ado G

Eco - Eco es un proyecto basado en innovación integradora, el cual busca beneficiar a los negocios que tuvieron altos costos operativos y pé...

modelo de negocio

In order to keep a injured index finger immobile

openknowhow.org

Solar Photovoltaic (PV) Technology is widely adopted electricity generation alternative due to its huge potential in harnessing solar energy...

photovoltaic system

technical design

Oliver Schlüter

Zink-Luft Brennstoffzelle plus Recycler

githubusercontent.com

zink-luft brennstoffzelle

These are pallet houses constructed in Haiti Communitere. Haiti Communitere is a resource center that facilitates projects with the intent t...

travel internships

alternative building

upcycling gallery

Chrismarks, GTrejo, Trippsmith.rsr, Joeyhajduk, Lonny

The Spring 2020 semester required rapid adaptation and cooperation in order to stay resilient during the COVID-19 pandemic. As such, our pro...

Self learning. If you're comfortable doing a bit of research and applying plenty of trial and error then this is a great option and thanks t...

GregPfotenhauer, Humble12

The following page is the result of an ENGR 305 project in the Spring of 2011 completed by Greg Pfotenhauer and Agustin Gonzalez. This page ...

In January 1996 we installed a rainwater catchment system to capture Oregon's abundant rainfall. Portland receives between 3 and 4 feet of r...

A dial indicator is a tool used to measure linear displacements. It accomplishes so via the use of a plunger that's constricted to a measure...

The goal of this project was to reduce the amount of unique connecting pieces needed to construct World Shelter's Just Add Sticks (JAS) shel...

alternative building

built environment

The manure biodigester at Rancho Mastatal converts animal waste into fertilizer and cooking fuel. It also provides extra waste material to t...

travel internships

waste to energy

anaerobic digestion

A table that attaches to the wheelchairs arms, providing a flat surface

openknowhow.org

'Pain in the Axle' is a bicycle-powered electrical generator that makes use of a modified recumbent exercise bicycle to drive a generator th...

A step by step process to make organic fertilizer tea

Open source lab

foliage coverage

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

An open-source incubator for fun and profit.

githubusercontent.com

Currently we can see free-libre hardware for RFID reader/writers but there is still no handheld that includes all the options to be used in ...

handheld device

handheld credit card reader

Compañeros de equipo de Guatemala, Honduras, Qinghai y Zambia colaboran por un proyecto que genera ingresos con aplicaciones por todo el mun...

bloques de suelo

interlocking blocks

Rancho Mastatal in Costa Rica has an award winning floating drum biodigester toilet. Jose Luis Zuñiga of Rancho Montezumo, a coffee producin...

travel internships

waste to energy

anaerobic digestion

composting toilets

Wind energy or wind power is being used in Bangladesh to combat the country's dependence on Natural Gas. Grameen Shakti[1] plans to make ren...

Chelsea, Mrg38, Kds

The (Campus Center for Appropriate Technology) CCAT recently changed houses, moving from the Jenkins House (which was temporary housing give...

raised garden bed

toxic soil solution

Augustine, Iln2, Leif, Gia3, Anthony.Gordon3

CCAT (Campus Center for Appropriate Technology) is a appropriate technology workshop space on the Cal Poly Humboldt campus. CCAT encourages ...

lightning system

ccat active project

DIN ISO 228 (DIN 259) BSP Standard Pipe Thread 13mm

openknowhow.org

You can often save your wet mobile phone (cell phone) if you act quickly. So after you salvage it from the sink, or from the table after a s...

Jthiller, Gcf5, Mcm781

As part of the Cal Poly Humboldt Parras Summer Program, we were given the chance to plan and construct an appropriate technology project of ...

The Solar Bowling Oven involves two bowls placed inside each other with the inner bowl painted black on the outside. Each bowl is sealed wit...

solar bowling oven

black electrical tape

The Igherm Restoration and Library Project is the restoration of a Moroccan Kasbah (or Igherm) for use as a community library. Located in th...

Lonny, Jonesy19, Squid-Samurai

This page compares Forest Stewardship Council (FSC) certified wood and wood harvested under California Logging Regulations.

Kan324, Nsvoma7, Kelsey Summers, Lonny, Jcb290, Rcg211, Njr220, Hcp82, Mnf148, Beefish, Nitopoop

This page is the compilation of a research project in partnership between Engr308 Technology and the Environment, The Sustainability Office,...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Radical Earth Solutions, Jcc562

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

For medical wards to receive soiled dressings and other medical waste

openknowhow.org

The Single Pit is one of the most widely used sanitation technologies. Excreta, along with anal cleansing materials (water or solids) are de...

single pit latrine

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

brachistochrone curve

physics demonstration

hot wheels cars

Galenavarrete, Enrique Borja

Esta es una descripción de proyecto. Este texto aparecerá en Google y otras páginas de búsqueda.

modelo de negocio

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Our job in Las Malvinas was to see if the local factory roof was a fitting place to put a rainwater catchment system for the community. We t...

rainwater catchment

feasibility study

MIT Global Poverty Initiative is a student group at the Massachusetts Institute of Technology founded in May 2007 by Anne Liu (Director from...

poverty alleviation

monaural stethoscope

medical devices

The Earthen Solar Cooker is a durable, low cost and low environmental impact design envisioned by Bart Orlando [1] for use by the poor in re...

Your photovoltaic system produces electricity from the sun. The battery stores some energy, but if there is no sun, there will be less elect...

solar electric system

Brian Willson led a march against the start of the Iraq War in 2003 as it arrived at a protest rally in Eureka, California. The PA system fo...

electricity generation

The following is a list of goals, procedures, equipment needed, and abstracts for four different rainwater quality testing procedures at The...

project testing

poor geometric design for function In much of the developing world it is very common to collect water in a bucket this water is then used fo...

osat 3d-printable designs

The Powered Easel is designed to be used by individuals who have minimal mobility of their upper extremities. The drawing surface is moved w...

minimal mobility

upper extremities

physical disabilities

Electroplating holder that allows deposition on fixed area on sample and has contacts that are isolated from electrolyte.

electroplating holder

Ericherrera, MattMegill

The purpose of this project is to renovate a greenhouse located at the Redwood Coast Montessori School (RCMS) and the Manila Community Cente...

2\ roofer's screws

sustainable farm energy alternatives

Through Queen`s University`s Department of Mechanical and Materials Engineering course Mech425, students are developing an open source datab...

energy efficiency

energy conservation measures

An Affordable, Accessible, and Flexible Imaging Platform based on a Raspberry Pi computer and Pi camera

githubusercontent.com

video recording

automated imaging

Agrokruh is a automated robotic system developed by the engineer Mr. Jan Šlinský of Slovakia. It is a stationary technology for the producti...

Ashleyward90, Sendog6913

The CCAT pedal powered concert generator.

electricity generation

technology for temporary communities

There is a pretty simple idea behind this OSAT project and concept is straight forward. A simple snap system that can be used in multiple wa...

osat 3d-printable designs

Even though there is a vast advancement in the generation of electricity, some of the rural areas of Bangladesh still do not have access to ...

Here, we designed and implemented a fully open source and low-cost hyperspectral scanner based on a commercial spectrometer coupled to custo...

githubusercontent.com

LMK392, Coreyhustead

The amount of materials present in our waste stream grows everyday with only a fraction of these materials reclaimed through current recycli...

upcycling. upcycling gallery

Bart Orlando built his first pedal powered electric generator in 1989 while traveling through New Mexico with the Global Walk For A Livable ...

electricity generation

Adabie2, Omar.abi

The Cal Poly Humboldt Dominicana Summer 2011 Program worked with the neighborhood of La Yuca in the Dominican Republic. Within Dominican Rep...

rainwater catchment

Mradi huu ni uchunguzi wa matofali ya udongo uliogandamizwa. Sababu kubwa ni mazuri sana.

earthen construction

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Matthew Arnaouti

Nerve injury is common in multiple trauma, both of the spinal cord and other nerves. Cervical spine injury is common in patients with modera...

Nickturmanbryant, Jmc1238

This is the Operation and Maintenance (O&M) manual for HEIF CCAT solar hot water system. Also check out the CCAT Data Collection/OM for more...

ccat active project

solar hot water

Snowmobile Choke

snowmobile choke

Although solar photovoltaic (PV) module costs have been declining aggressively there has been only modest capital cost improvements for the ...

sustainable development

mechanical engineering

mechanical design

balance of systems

renewable energy

frugal engineering

This page contains the work of University of Michigan - Dearborn students Tom Silka, Chris Marquette, Anthony Darkangelo, and Ryan Kiblawi. ...

peak flow meter

mechanical pencil spring

reciprocating saw blade

The Ashden Awards for Sustainable Energy are annual awards given by a charity of the same name that is based in London. They reward local su...

renewable energy

sustainability organizations

This is the Operation and Maintenance (O&M) manual for CCAT sunfrost refrigerator. Please refer to it and keep it up to date with any O&M ch...

ccat active project

Alc818, Cassidy, Jenna Marie, Afa99

Spring semester 2017 at HSU, our team of four ENGR305 students were assigned the task of revamping the greywater system located at CCAT. Whi...

Wenn die meisten Menschen darüber nachdenken, wie sie eine Geburt geben werden, planen sie dies in einem Krankenhaus zu tun, wo Ärzte alles ...

Scalable Aquaponics System Bins. The OSAT project I wanted to tackle was Goal 2, 'No Hunger'. For this goal, I decided to design a scalable ...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Ridma Kaveendra

microstrip antenna

cancer detection

To many woodworkers, a belt sander is a very important and useful tool that is typically found in woodshops throughout the world. Belt sande...

a regression of [1] or [2] on functionality design weakens main strike plate most FFF materials not recommended for this application unneces...

In addition to their low cost and weight, polymer heat exchangers offer good anticorrosion and antifouling properties. In this work, a cost ...

polymer heat exchanger

plastic heat exchangers

advanced heat exchangers

layer-by-layer line welding additive manufacturing

process intensification

polymer welding

polymer laser welding

additive manufacturing

linear low density polyethylene

heat exchangers

open source hardware

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. This is a l...

open source optics

open source hardware

Bcreager, Cjf336, Caelidh

This project is a collaboration between students in the Practivistas Dominicana Program and the rural community of Las Malvinas in Santo Dom...

Jbader, Nrc190, Nsvoma7

Kutokana na kuwa hifadhi za mafuta na gesi zinakuwa finyu, njia zilizoeleka za uzalishaji wa nishati zitakuwa aghali zaidi na zisizotegemeka...

energy conversion

nguvu ya pedali

To dispose of sharp items

openknowhow.org

This page describes the materials, processes, and work that goes into making a small covered wall made from natural construction materials a...

Coellomerissa, Smaugmander, Iad31, Emm614, Oliverruiz123

recyclable cleaning station

repurposed materials

3-D Printing of Open Source Appropriate Technologies for Self-Directed Sustainable Development. The technological evolution of the 3-D print...

The design features of a conventional shower minimize thermal comfort, maximize energy use and water consumption while exacerbating moisture...

energy efficiency

water conservation

sun frost shower

green businesses

vaccine refrigeration

The following is a recipe for quark, or curdled milk, based paint. Quark is a Casein Paint. The recipe is very specific but casein paints la...

earthen construction

Demotech (anna)

Es geht darum mit möglichst wenig Mitteln eine Bad-Einheit bestehend aus Toilette und Dusche zu konstruieren. Ziel ist es die Sanitärbedingu...

composting toilets

Shyam, Shyams19

This garden water sprinkler can be easily used to sprinkle water on a certain given region of garden by inserting a jet stream of water. The...

AlirezaLorestani

Introduction of ensemble learning by using LFW data set.

machine learning

ensemble learning

Previous published methods for non-targeted screening of toxins in alternative foods such as leaf concentrate, agricultural residues or plas...

global catastrophic risk

alternative food

existential risk

leaf concentrate

non-target screening

sustainable food systems

The project aims to bring problems from measurement and control technology closer to a broad audience. The problems are presented in a game-...

Research networks foster creativity and break down institutional barriers, but introduce new geographic barriers to communication and collab...

energy conservation

educational resources

augmented reality

educational games

energy efficiency

Tch29, WuTangSword, Dustin.Poppendieck

This page is an analysis of an energy audit and lighting retrofit performed by the Redwood Coast Energy Authority (RCEA) on Ramone's Bakery.

As the additive manufacturing industry grows, it is compounding the global plastic waste problem. Distributed recycling and additive manufac...

distributed manufacturing

additive manufacturing

Print Out Custom T-Shirts at your Home right from your Desk with an Amazing 3D Printer!

custom t shirt designs and prints

Stethoscopes are a critical tool used by doctors on a daily basis for amplifying the body's functions. Primarily, heartbeats and breaths are...

remote medicine

Lonny, K. Scott Perry

This project was a test of natural plasters, finished with a protective lime-wash coat of natural paint, for outdoor application. The client...

green construction

earthen construction

Stephcald, Njr220, Curly96m, Nah33, MikesPlace

Stephanie Calderon and Michael Wold created a landscape design of the front area of the Jefferson Community Center and Charter school. The l...

edible landscape

education center

It is well established that lack of both electric supply capacity and reliability weaken the Nigerian economy. Recently, the reduction in so...

diesel generator

solar photovoltaic

levelized cost of electricity

most completed projects and publications

Solar Wax Melter with 3D Printed Molds utilizes 3-D printing capabilities and the energy produced from the Sun to heat and re-purpose crayon...

osat 3d-printable designs

parabolic solar cookers

Lonny, K. Scott Perry

green construction

earthen construction

Patrick Gilland

Hemostats are a medical alternative to clamps. They are especially useful when the user only has one hand available or access to something f...

The Appropriate Infrastructure Development Group (AIDG) promotes affordable and environmentally sound access to electricity, sanitation and ...

portable wood burning stove

galvanized sheet steel

I've been working with electric bikes for almost 3 years now and as I was browsing my favorite site looking for new ideas I stumbled upon a ...

electric skateboard

Ans625, Anazurawski, Ahh144

Cambridge Cohousing is an infill residential project consisting of 41 units of housing on a narrow 1.5-acre site between the street and a ra...

transportation benefits

open space preservation

efficient fixtures and appliances

insulation levels

c&d waste management

natural ventilation

ventilation effectiveness

Rapid manufacturing using 3-D printing is a potential solution to some of the most pressing issues for humanitarian logistics. In this paper...

appropriate technology

distributed manufacturing

open source hardware

additive manufacturing

disaster relief

humanitarian engineering

humanitarian logistics

rapid manufacturing

remote manufacturing

A pointer trowel is used in masonry to fill in joints. It has an angled, pointed end that can be used to get mortar into tight spaces. This ...

Tom van der Vaart

20.5/16.5 straight coupler used to join to pipes.

openknowhow.org

Vinay Gupta, Chriswaterguy

Six ways to die (6WTD) is a simple model by Vinay Gupta which helps explain what needs to get done in a crisis. It explains some basic conce...

industrial ecology

energy efficiency

emergency management

environmental philosophy

waste management

For this OSAT Project a design challenge was done for Field Ready, which makes humanitarian supplies in the field. The reason this design ch...

respiratory disease

This study presents a life cycle analysis (LCA) of a 10-MW foam-based floatovoltaics (FPV) plant installed on Lake Mead, Nevada, U.S. A mate...

life cycle assessment

Haho16, J.M.Pearce

This project details an open source water testing platform derived from the open-source colorimeter, which is made from open source electron...

open source optics

open source hardware

open source scientific hardware

open-source colorimeter

water and sanitation for developing countries

This page contains the instructions and files necessary to 3D-print a loudspeaker. This isn't the best sounding speaker on the planet - it c...

science class lesson

The Solar DIY Air Filter designed by Radiant Enterprises is a project aimed at creating a design for an accessible, replicable air filter de...

Ejhunt, Wijnen, Gcanzalo

This article explores a new open-source method for developing and manufacturing high-quality scientific equipment suitable for use in virtua...

open source optics

open source hardware

open source scientific hardware

This is a Bamboo Joint model that can be used in building bamboo houses, rooms or any sort of suspended pavilions. One side of a Bamboo can ...

osat 3d-printable designs

alternative building

construction and materials

built environment

Lonny, Laz14, Nicholas Weiser, KyleA2, Stephen3

Team Innovations Explained has been set out on a quest to make two simple machines for the Redwood Children's Museum in the Fall semester of...

Field Ready is working with World Vision to provide medical supplies to a number of Heath Posts in the Dolakha district in Nepal. Health pos...

I wanted to implement my own at-home kid-friendly 3 bin composting system.The objective of this project is to make a small-scale at home com...

ccat compost system 2020

What used to be a patch of gravel behind the Makombe homestead in Musipami village is now a thriving 100-squaremeter garden of green leafy v...

Download ECM now! A server is a computer dedicated to running sophisticated programs which require a substantial amount of memory and comput...

energy conservation measures

energy efficiency

Gi14, Dillon, Jwa19

The Mechanical Munchy-Maker is a mechanical bicycle that turns human leg power into mechanical rotation and generates energy to power a kitc...

Tom van der Vaart

To secure clothing to washing line

openknowhow.org

The Practical Action donkey plough was developed in Sudan in the Darfur region over a period of time where a number of trials and adaptation...

Ridma Kaveendra

A water catchment system is a system used to capture clean water from rainfall and direct it into a storage container. It is an easy method ...

water catchment

Ksuutala, Jan.akmal

air quality detection devices

parametric equipment attachment

This project is an upgrade on the current Recyclebot v5.0 cooling section. The previous design uses a top-down approach at cooling off the f...

filament extrusion

Minnow traps can be essential for collecting your own bait when none is available to purchase and are relatively inexpensive to purchase, ho...

Felicity Tepper

The can lantern is a very simple way to make a lantern that throws light in a pretty pattern of your choice. It makes use of an opened can t...

The Urine Diverting Flush Toilet (UDFT) is similar in appearance to a Cistern Flush Toilet except for the diversion in the bowl. The toilet ...

diversion flush toilet

The idea behind the project is relatively simple. A stand allows the back wheel of a bike to spin freely (usually used for indoor exercise) ...

energy conversion

Daw27, Acs26, Lonny

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

This project stems from the OXFAM equipment catalog and attempts to make a 3D printed version of a speed brace. The purpose of this tool is ...

osat 3d-printable designs

Minkmuse, Ctnoonan, Alfonsoh, SMichael

The purpose of this project is to create a low embedded energy, natural, beautiful way to cook pizza. The project will be a collaborative ef...

green construction

sustainable building practices

OSSTIP: an action-research effort to collaboratively build an Open Source Sustainable Transport Informatics Platform.

public transport

information technology

transport informatics

community informatics

Adc37, Bav9, Jacobmoore, Dustin.Poppendieck

Richard E. Benoit DDS is a local dentist who is interested in being more environmentally conscious. He was contacted by the Redwood Coast En...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Juliana, Iem4, Lonny

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Fernando Cornejo

Este proyecto innovador consiste en la implementación de filtros de agua de bajo costo en zonas y comunidades de escasos recursos en El Salv...

modelo de negocio

What is energy good for? Simply put, energy performs work, which underlies all economic activity. Work (in the physics sense) is relevant be...

quality of life

Review of low cost synthesis of perovskite solar cells

Urbanrider, 8rmf, 7aa38, SarahA

A thermostatic valve for a solar water pasteurization device. See Adapted thermostatic valve for water pasteurization for final design. For ...

thermostatic valve

water pasteurization

water treatment

water purification

local production

Executive Summary: One Laptop per Child is a non-profit organization that provides children in some of the most remote areas on earth with o...

solar powered laptop

This page discusses Garden Update, a project that involves updating Zane Middle School's garden to better promote its integration into the s...

vegetables start pack

This idea is inspired by the Ecole Polytechnique Fédérale de Lausanne's 'Solar Thermal Energy Regulator system' (see http://web.archive.org/...

solar water heating

Drew91w, Cec91, Trevor.Herron

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

model bridge tester

Global agricultural catastrophes, which include nuclear winter and abrupt climate change, could have long-term consequences on humanity such...

global catastrophic risk

alternative food

cost-effectiveness analysis

existential risk

artificial intelligence

Littleredshrub, Caelidh

Eco-Festivals are as many and varied as the people who put them together. There are many festivals that fall under this category with varyin...

The intent of this project, created in collaboration with Mech425, is to identify the best angle for flat, uniform blades in relationship to...

We are organizing a series of screenings on Human Rights and Social issues at MFU in Chiang Rai Thailand as well as workshops to train stude...

Kburrell, Abombies, Lonny, Emilyread

The objective of this project was to develop a cost-effective composting system that is durable, educational, and safe for children gardener...

corrugated roof

Il chiosco solare è una stazione di ricarica che ha un 'Dual USB Power Charger' che ha il proprio regolatore di volt all'interno e un regola...

charging station

Abi Bush/Kin Ly

A wooden contruction to measure the height of the child

openknowhow.org

Drawing Exchange (DXF)

Access to vacuum systems is limited because of economic costs. A rapidly growing approach to reduce costs of scientific equipment is to comb...

fused filament fabrication

open source 3d printing

additive manufacturing

post processing

thermal processing

Holding as many as twenty four-inch tablets of chlorine, the chlorinators we use in Port-au-Prince can treat 5000 gallons of water each day,...

community participation

health infrastructure

international development

water distribution

water purification

water treatment

Abstract Solar photovoltaic (PV) technology can provide sustainable power for the growing global population in cities, but it demands consid...

Melted waste plastic & aggregate as cement replacement

openknowhow.org

This stove was designed to provide a source of biochar for small scale growers while burning the gases given off form the char production to...

This article details the design of an open source emergency gentle ventilator (gentle-vent) framework that can be used in periods of scarcit...

medical hardware

additive manufacturing

medical devices

appropriate technology

repurposed hardware

The Campus Center for Appropriate Technology contracted our team, The ECO-PLUMBERS through Engineering 215 Intro to Design at Cal Poly Humbo...

particulate filter

Rise&Shine, Agua Canela, ConnorLathrop, Bkalarney, Desteny

The CCAT Yurt was designed as a place where students and community members could come in and achieve a sense of relaxation. It fits in quite...

ccat active project

upcycling gallery

Bart Orlando and Kati McGuire first demonstrated the use of a pedal powered electric sewing machine at CCAT in 2003 while sewing the net for...

electricity generation

Kevinaguirre, TurboPao

Diseño y creación de un sistema eficiente capaz de almacenar agua lluvia que puede ser reutilizada en épocas de sequía para uso doméstico y ...

modelo de negocio

I am in the process of building a parabolic solar cooker using a base of thin plywood and a final coating of cob to finetune the shape. The ...

Cartografías Líquidas es un proyecto de EUNIC El Salvador, integrado por el Centro Cultural de España en El Salvador, la Alianza Francesa en...

desarrollo sostenible. medio ambiente

activismo comunitario

residencias artísticas

This project is an exploration of compressed earth bricks. Mostly because they're awesome. CCAT, the campus center for appropriate technolog...

earthen construction

Esta página explica cómo producir ladrillos caseros a partir de una mezcla de cemento y plástico. Hice este proyecto con el fin de reciclar ...

Die 'Waschen & Spülen' ist ein umweltwissenschaftliches Projekt der Humboldt State Universität, welches durch Jeffrey Steuben, Annie Welbes ...

grey water flush

toilet modification

sustainable design

Download ECM now! Double-sided printing is one the easiest ways to save money, reduce waste, and improve your carbon footprint. If your prin...

energy conservation measures

energy efficiency

double-sided printing

The goal is to construct a piezoelectric energy harvesting device that can generate enough energy to create a noticeable charge in a battery...

charging device

An abundance of clean, locally-produced, combustible fuel could dramatically improve the standard of living in parts of the developing world...

solar distillation

The composting toilets at Rancho Mastatal convert human waste into fertilizer for plants. It has two large compartments to store waste, and ...

travel internships

composting toilets

Rainwater is relatively free of impurities except for those pollutants from the atmosphere that settle on the roof, organic matter and bird ...

project testing

Elena Iraheta, Lau Casco, Valeria Soriano

Sistema de captación de aguas lluvias, desarrollado originalmente en California, Estados Unidos, por Kyle Basnett y Colin Bourgeois. Las agu...

modelo de negocio

The purpose of this Mech425 project is to design a mechanically powered (Human powered) battery charger that will recharge low voltage batte...

battery charger

energy generation

electricity generation

appropriate technology

Personal alarm for protection and creates attention in emergency situations

openknowhow.org

Construction of a laser trip-wire to shut off a Delta printer (specifically MOST delta RepRap) in the event of a detached hotend nozzle or r...

3d printer modification

laser trip-wire shutoff

Jbader, Isabelc820, Jfbnhum, Nam78

This page narrates a project implemented by Team Terrific between May and July of 2014 for the Practivistas Dominicana program in Santo Domi...

floral snippers

propane-powered grill

waterproof wood paint

This design can be printed to produce a bicycle chain to be used with a bike. This design can fit under multiple OSAT goals that involve che...

For my Alternative Energy Class Final Project at Sierra Nevada College I built a solar oven with the provision of Ben Solomon’s shop and too...

appropriate technology

upcycling gallery

For many people in Bangladesh small-scale fish farming is an important opportunity to generate income and is a significant nutritional sourc...

water heating tank

A Hexayurt H2 is a hexayurt-style structure with space for a single person or cozy couple and a few personal effects, nothing more. It is ro...

Stadium light reflector hoods function as solar cookers and drinking water pasteurizers. When aimed at the sun the parabolic reflector works...

parabolic solar cookers

Download ECM now! Replacing your current desktop configuration with a laptop and docking station can save a great deal of money and electric...

energy conservation measures

energy efficiency

The future happened yesterday The Urban Rain Catchment System, or URCS is our first attempt at appropriate innovations towards sustainable e...

rainwater catchment

This is a butterfly bicycle handlebars designed to fit 25.4 mm clamp. I designed this to fulfill the request for 3-D printable bicycle handl...

butterfly handlebar

osat 3d-printable designs

Haiti Communitere has re-purposed a few shipping containers to serve as homes, offices, and storage spaces. The shipping container that has ...

travel internships

alternative building

In early years, as well as in developing areas, humans did not have the technology to ventilate their buildings through mechanical and elect...

Jfc28, Logan hsu, Dustin.Poppendieck

In late August of 2008 Eureka Central Residence, a low income housing complex located in Eureka, CA, underwent a lighting retrofit. This ret...

Bioorganicgardener, Lonny

Permaculture is a sustainable agricultural system that takes inspiration from patterns, processes and systems of nature, and integrates best...

service learning courses

To improve the Universal Nut Sheller(UNS), the LC Sheller(Light, Cheap Sheller) design lowered the cost and weight of existing design using ...

low cost nut sheller

This is meant to be used by EMT or other first responders for immobilizing a head and neck after major trauma, keeping the head steady durin...

neck immobilizer

Tom van der Vaart

To dispose of sharp items

openknowhow.org

Using a closed loop belt has significant advantages over an open loop belt. Carriage assembly can be much simpler. The printer can be used ...

closed loop belt

The quick fastener is what secures the plastic body panels to the frame of the snowmobile. They work by inserting them into the prefabed hol...

snowmobile parts

Open source, lightweight, sturdy bulb and seed planter. The idea of this OSAT is a small, easily producible, hand sized, bulb and seed plan...

osat 3d-printable designs

The straw bale house at Haiti Communitere was built by Builders Without Boarders. It was made entirely out of locally sourced materials. Str...

travel internships

alternative building

Innovación comunitaria encontrada en la comunidad El Majahual, del municipio del Puerto de la Libertad, La Libertad. Consiste en recolectar,...

This project was completed and the findings were reported collaboratively by Jadyn Powell and Dilpreet Bhambra. The purpose of this project ...

Mayank Moon, Athachir

Flowmeters are the devices that are used to measure the flow of liquid & gases that pass through them. Flowmeter that measure the flow by ca...

measuring device

Binghan, Tbotbyl, Dmmacewe, ATuthill

CIGS solar cells are based on chalcopyrite materials (copper iron sulfide mineral that crystallizes in the tetragonal system) which are prod...

industrial ecology

cigs solar cells

energy efficiency

environmental philosophy

waste management

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

photovoltaic system

troubleshooting

The students and faculty at la Universidad Technológia de Coahuila (UTC) are interested in learning more about photovoltaics. Located in Par...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Download ECM now! Standby power or 'phantom power' is defined as the power consumed by electric and electronic devices, such as computers an...

smart power bars

energy conservation measures

energy efficiency

Ashleyward90, Sendog6913

The mission of the Campus Center for Appropriate Technology (CCAT) at Cal Poly Humboldt (HSU) is to promote the use of appropriate technolog...

ccat pedal powered

The goal of this project is to design a similar photodiode package that could be fabricated with a 3D printer and thus avoiding the huge too...

When urine or faeces cannot be used immediately or transported using a Conveyance Technology (i.e. Jerrycans or oil drums) it can be stored ...

blackwater storage tanks

Mpc49, Apb38, DomT, Zps4

The CCAT solar photovoltaic system has gone through many changes over the years that it has been used. The current solar panels were always ...

ccat active project

Omar.abi, Srr74

In 2010, Danco and The Humboldt Bay Center for Sustainable Living were in the process of restoring the upstairs of the Samoa Cookhouse and s...

solar hot water

The goal is to make 3D Metal Printing more affordable to the general public, hospitals, small institutions, organizations and companies arou...

3d metal printer

3d metal printer

additive manufacturing

The earthen rocket oven at Rancho Mastatal was originally built as a standard earthen oven. Overtime, they decided that the cooking style of...

travel internships

earthen construction

improved cook stoves

The Creality CR-10 is an open source FFF 3-D printer. Source code: https://github.com/Creality3DPrinting/CR-10 Creality CR-10 Smart Pro—30x3...

In many parts of the world, fishing is a very large part of life, as a plentiful source of both food and income to many people. A fish hook ...

There are many items at a typical office workstation that consume unnecessary power. Many aspects of a PC/workstation were considered, inclu...

energy conservation measures

energy efficiency

This simple motor was constructed from a 10.5cm section of bamboo, a set of battery terminals, a magnet, roughly one meter of wrapping wire,...

battery terminals

nonparametric openscad doesnt render design as posted suboptimal printing orientation and design This is a 3D printed finger splint used for...

Nature's world was an eco visitor attraction in Middlesbrough, UK. It had various themed gardens and educational features, and closed to the...

Connector for ventilator

openknowhow.org

My goal was to create a printable item that would be useful in many regions and I realized that in many countries people rely on bikes. Biki...

Alexandrae01, Kenia Echeverría

Este es un proyecto de emprendimiento que se enfoca en la captación del agua lluvia y el filtrado para producir agua de la más alta calidad....

modelo de negocio

Used to lock the door

openknowhow.org

Bart Orlando demonstrates the pedal powered grinder which he designed and built with the assistance of HSU appropriate technology students. ...

Tom van der Vaart

Spare connector for a weather station

openknowhow.org

Dr. Doshi, of the large densely packed city Mumbai, India, has developed food production techniques for his context. His city garden methods...

urban agriculture

space efficiency

The Arcata Wastewater Treatment Plant processes the biosolids from the digester into compost at its onsite composting facility. The finished...

Izterico, Dustin.Poppendieck, Scm48

The Arcata Community Recycling Center (ACRC) (Figure 1) has been serving the community of Arcata, CA for the last thirty years. Mark Loughmi...

The locally made Sunfrost refrigerator, running on 12 volt DC electricity, is 600% more efficient than a conventional refrigerator. The thre...

energy efficiency

thermal insulation

ccat active project

green businesses

vaccine refrigeration

Terraces and ditches prevent erosion on steep slopes and create areas for farming. Terraces and ditches are dug according to the contour of ...

polyculture planting

food and agriculture

soil conservation

Accessing clean water is still a struggle for many people throughout the world. In areas devastated by natural disasters, it can take years ...

Mrhelmke, Fionaconnor

geometries need refinement

This device is meant to help 3rd world countries who do not have access to small containers. This device could be used to protect from anima...

osat 3d-printable designs

Jmpurdy, Maddawwwg, Lonny, Maya Branch

We are a part of Cal Poly Humboldt's Engineering 305 class of Spring 2022. This semester, we've worked on building a Rainwater Catchment Sys...

Individuals with missing legs from above the knee are in need of prosthetic knee joints. These artificial knee joints can be difficult to ob...

This article deals around the set-up of a (extremely) low cost water filtration system. Water filtration can be used if there are few or no ...

water treatment

low cost water filter

Free and open-source hardware (FOSH) development has been shown to increase innovation and reduce economic costs. This article reviews the o...

energy conservation

renewable energy

national security

The goal of this Cinematography Quadcopter is to create an open source platform that can be used for areal photography and cinematography, a...

Cjshaw, Ajseidl, Kemyszka

To create a full model of a 3-D printable piezoresistive sensor in order to detect the amount of impact that an athlete receives during a co...

The Purpose of a Chicken Tractor is to use it as a passive tilling system for a tract of land. The chickens living inside the tractor walk, ...

chicken tractor

A Market Equivalent Motor by DC Micro Motors People looking to purchase motors similar to the ones produce here would be our target audience...

This page lays out the steps required to convert your current Delta Athena II printer to have a newly designed flexible driveshaft printer, ...

3d printer modification

flexible material

Joins flanged pipe (not pressurized)

openknowhow.org

The objective of this project is to analyze and compare the effects of the HSU policy and pricing regarding mason jars and disposables in te...

life cycle analysis

Anaís, Sofía, Robeeert, Carito

El condensador de agua es un proyecto sostenible que tiene como objetivo apoyar a comunidades de El Salvador que sufren de escasez de agua p...

modelo de negocio

El quiosco solar es una estación de carga que tiene un 'Cargador de energía USB dual' que tiene su propio regulador de voltios en el interio...

charging station

Asabet, Kwojcik

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

This is an implementation of using a photoelectric smoke detector to trigger the reset pin on the Beaglebone Black Rev C being used on the M...

3d printer modification

most athena delta

Curtbeckmann, John Wu, Lonny

An electric lawnmower that utilizes solar power as an energy source will address a number of issues that standard internal combustion engine...

solar charging station

refurbished lawnmower

Molecular Beam Epitaxy (MBE) is a material fabrication process used to produce high-purity nano-scale materials. A material is grown through...

nano-scale materials

Cheyenne Celada, Jesse, Eparrish11, Lonny, Lg137

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

rainwater catchment

One_Sheet_Solar_Cooker en inglés / in English. http://imagina-canarias.blogspot.com/2008/06/cocina-solar-simple.html 9 june 2008 Es la coci...

T.J.Michels, Bryan J. Turner, A. Wiese

This is a speculative class project and needs to be refined before being deployed at any scale. In recent years the application of digital ...

imaging devices

Zwei Kompostierungssysteme, die Abfall-Biomasse (wie zum Beispiel Küchenabfall und landwirtschaftlichen Abfall) und Menschenabfall zum Heize...

renewable energy

Designed in response to a request for Medical Tweezers from Field Ready. This is a versatile design for Medical Tweezers as it's designed in...

medical equipment

Tessykins, Aeb116, Jmavandi, Syles, Lonny

It has been almost ten years since CCAT has been painted. The last natural paint project was in 2007: CCAT natural paints and since then som...

ccat active project

earthen construction

The Modified Justa Stove is a version of the Justa stove. This particular version is being disseminated by Foro Para el Desarollo Sostentabl...

This two piece device allows you to get a firm hold on any type of textile without puncturing them. The first part of the device, which we w...

fabric fastener

Mdevuono, R.Andrews, Faviola Romero

The goal for this Open Source Solar Spectrum Analyzer was to collaboratively design the mechanical and electronic controls for a direct/diff...

perspective drawing

It is an ideal for mixing samples in blood and centrifuge tubes. The 3D printed mixer is a lot cheaper than that available in market. Its al...

This is the simplest solar cooker I've been able to design:

Food dehydration is both a desirable and appropriate technology for many reasons which include increasing the shelf-life of food without hav...

food dehydrator

solar dehydrating

Adapter that connects oxygen supply tubing to standard oxygen systems

openknowhow.org

Makennawaterfield, Lg137

A rapid composting system was designed by Engr215 Introduction to Design Team 6 to find a better use for the green waste generated at the Hu...

Dual extrusion opens up many possibilities for 3D printing. The most obvious use for dual extrusion is to have 2 color models printed. Howev...

3d printer modification

Jessicaleola, Cts21

This webpage is an energy retrofit analysis of a local bookstore in Arcata, CA that was completed by Redwood Coast Energy Authority.

This outlines the integration of the Open Source Hardware Association (OSHWA) Certification requests on Appropedia.

The CCAT pedal power lab was located in the basement workshop of the CCAT house. Bart Orlando began building pedal powered devices there wit...

electricity generation

Clamps over the hose on the outlet of a water distribution truck to create a seal

openknowhow.org

forest machinima

Low-Tech, High-Thinking

The open-source and DIY OHorizons' Wood Mold allows local organizations to manufacture concrete BioSand Filters for a fraction of the upfron...

The mineral sifter is an excellent example of OSAT. Sifters are a major time saver, especially in third world countries where simple applian...

SVickers, Ken MacDougall

Telecommuting is a work arrangement for which an employee is allowed flexibility in their working location and hours. Its main purpose and a...

Agrivoltaic systems are a strategic and innovative approach to combine solar photovoltaic (PV)-based renewable energy generation with agricu...

most completed projects and publications

joint production

food-energy-water nexus

sustainable agriculture

energy innovation

technology adoption

Built in the fall of 2003, this cob bench located at 4th and F St in Arcata, California, was completed by Humboldt State student Patrick McA...

recycled concrete

earthen construction

3D printed hand tool used to hold objects firmly

openknowhow.org

Where would you imagine one of the most advanced sustainable agricultural practices could be found? Probably in some large urban centre with...

sustainable technology

3DP house model - For assessing flood response housing sizes and layout (Malawi thatch house)

openknowhow.org

Matthew Arnaouti

Focused Assessment with Sonography for Trauma (FAST) is a limited ultrasound examination used for identifying the presence of free intraperi...

Agrivoltaic systems integrate agricultural production with solar photovoltaic electricity generation. Given the proven technical, economic, ...

Cotton is historically one of Pakistan's top cash crops, along with oil seeds and fruit. [1] Pakistan's economy is reliant on the cotton ind...

Carolan, Jghoul, APenny6, Humantrout

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

green construction

slope stability

recycled concrete

To assist firefighters and other first responders to use their existing equipment for respiration during the COVID-19 pandemic without using...

medical hardware

powered air-purifying respirator

additive manufacturing

personal protective equipment

safety equipment

medical devices

The Bubble Box was created by Team Jumanji to fulfill the need of CCAT to have a functioning Kid's Zone. Other options were considered as a ...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Atw22, Nic.Sabo, Weekly33, Conorritz

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

circuit education

electricity demonstration

series and parallel

alligator clips

Folks on the ground can look at local needs and resources. Appropedia can help by providing links to specific technologies, 'appropriate' in...

emergency management

Matthew Arnaouti

Head trauma is a major cause of death and disability in children and adults. Rapid and effective assessment and management in the Primary Su...

While it is obviously very nice to have a brand new building to house any food production unit, this is of course not always possible. The f...

food processing

This wire band is a first prototype of a low-cost face mask band to address the lack of 3D printers and the overall cost of printing bands i...

This project is designed so that it could be used for tracking the sun light and convert it to electrical power using the solar panel. I hav...

This project aims to design, create, test and evaluate a zero cost solar disinfection (SODIS) water purification method which could help pro...

appropriate technology

water purification

This article describes the prototype of a compost heater silo, which is the heart of an internal Compost heater, in an early development sta...

polyethylen tank

waste management

renewable energy

Cc271, Lwink11, Tatilew10

The Solar Swing is a project from Cal Poly Humboldt's Engineering 215 class. The Solar Swing is a solar oven designed to be implemented in e...

corrugated plastic sheets

A methodology is provided for the application of Light Detection and Ranging (LiDAR) to automated solar photovoltaic (PV) deployment analysi...

most completed projects and publications

A holder that attaches to the wheelchairs arms, providing a storge for a cup

openknowhow.org

Este proyecto se trata de una escuela con muros de botellas,<ref>http://cubeme.com/blog/2010/12/28/plastic-bottle-school-by-illac-diaz-and-t...

Dengue fever is a serious, sometimes fatal illness, which has been increasing in recent years in Indonesia. It is spread by a type of mosqui...

mosquito control

waste management

This Effector for a column delta printer, like the MOST delta RepRap allows different hotend nozzle sizes to be used. It does this without ...

3d printer modification

hotend effector

On Site Solar Hot Water on Haeger Ave, Arcata Presentation by Alan Cook Solar hot water systems are also referred to as solar thermal heati...

Two composting systems which use waste biomass (such as kitchen refuse and agricultural wastes) and human wastes for heating water are descr...

renewable energy

This report provides a summary of the motivation, design, and installation of a solar photovoltaic (PV) generation system at St.

photovoltaic system

A low-cost DIY hydroelectric Turgo turbine made from household tablespoons and optimized to achieve 1.5 kW mechanical power at over 60% effi...

Matthew Arnaouti

The burden of paediatric trauma is greatest in low- and middle-income countries where more than 95% of all injury deaths occur. Paediatric i...

The goal of this project is create a safer way to smash and shell acorns. There is a base where the acorn can sit that has a handle attached...

Maxime Zimmermann

Designed for ease of use, robustness and low-cost, the “Openspritzer” is an open hardware “Picospritzer” as routinely used in biological lab...

githubusercontent.com

pressure system

Germorales, Mónica Leonor, Rodrigo Solórzano, Carlos Chávez, Fausto

DIY Desk and Table es una opción innovadora para optimizar el espacio en los hogares, además, provee un área de trabajo digna para aquellas ...

fabricación digtial

This article provides a detailed how to for construction and use of this bailer as well has some design. A discussion on the application of ...

hand powered tools

NUBIAN'S OASIS GREYWATER RECYCLING ATTRACTS COMMERCIAL INTEREST FROM WATER SOLUTIONS ENGINEERS Greywater recycling in apartment blocks, hote...

activated carbon

Make your own wheel hoe at a fraction of the cost of buying a new one. Wheel hoes are fantastic labor savors in larger gardens and organic f...

repurposed bicycle

Asthma is one of the fastest growing urban health problems throughout the world. It affects children in low income areas more than others an...

A Shake Table was designed and constructed to imitate earthquake magnitudes to help students at Zane Middle School to better understand seis...

earthquake structural test

Tme21, Ccs31, BethEschenbach

The Solar Radiation Monitoring Station project is one of Humboldt's Renewable Energy Student Union's responses to the need for more renewabl...

renewable energy

The natural hut is to encourage more use of the Nature Park. This is a space to sit and to learn more about environmental education A Nature...

This website is dedicated to a design project offered by the Engr215 Introduction to Design at Cal Poly Humboldt in Arcata, California. In c...

energy conservation

energy efficiency

Sunil works as a Biomedical Engineer at Grande International Hospital, Kathmandu. A piece of equipment that he repeatedly sees in the engine...

respiratory disease

Community gardens are an excellent way to bring local people together and take action towards a more sustainable way of living in your own n...

community action project

Julialibrera, Chriswaterguy, Ginalabar

What makes it so super? Superadobe is a form of adobe (earthen) construction that uses long snake-like sand bags and barbed wire in building...

earthquake safety

earthen construction

Gerardorivass, Apereira94

AquaTank es un proyecto que promueve el ahorro de agua y energía en nuestro entorno. Este consiste en aprovechar el agua de lluvia mediante ...

THE QUESTION: What is 'Appropriate technology'?? EWB NSW set out to answer some of these questions through an Appropriate technology Showcas...

australian events

appropriate technology demonstration events

To facilitate future novel devices incorporating rare earth metal films and III-V semiconductors on Si substrates, this study investigates t...

aluminum nitride

microstructures

magnetic properties

stranski–krastanov growth

frank–van der merwe growth

Forests help stabilize soil, prevent erosion into water ways, and slows water flow from rain so that there is increased time for percolation...

The objective of our design project is to create an interactive, educational display model that demonstrates the importance of energy conser...

electric lighting

energy efficiency

Thomas Korejsza

This page refers to the treatment and reuse of water. For the direct use of wastewater, see Greywater. See also Sanitation, Biogas and Compo...

water conservation

resource conservation

water recycling

water purification

THE MULTIPLE BICYCLE POWERED GENERATOR. Designed and Built By Bart Orlando At CCAT. This generator preceded the Human Energy Converter and w...

electricity generation

Relocalization is a strategy which aims to rebuild societies based on the local provisioning of food and energy, and the relocalization of c...

In the industrialized world in which we live, bees are constantly losing their natural habitat. To address this issue, although on a rather ...

We study polarization independent improved light trapping in commercial thin film hydrogenated amorphous silicon (a-Si:H) solar photovoltaic...

Construction Guide 1.0 Re~Cycled Bicycle Trailer 2003Re~Cycle Take an unwanted bike lying in the UK, ship it to a country where it's really ...

Dried nuts such as walnut are grown in countries like Brazil and India Predominantly. The farmers are usually small land owners with little ...

I made this project out of parts that I mostly had saved from various other projects and from work. It was built in October 2007 and origina...

rainwater catchment

A Tankless Water Heater Display for the Redwood Coast Energy Authority Our objective is to design an interactive display promoting energy co...

energy efficiency

JAMira, GenesisTenorio, Aspinzon123, Fátima

Ameyali es una estación para la distribución de agua y el lavado de manos, que trabaja de forma segura, evitando el contacto con superficies...

handwashing station

There are many ways to build a good compost. This page shows a method that comes from a rural, developing world perspective, although it cou...

CRBasic is the programming language which controls the functionality of a Campbell Scientific Datalogger. The program controls all processes...

This Open Source Appropriate Technology (OSAT) fulfills a request for pipette accessories on the 'Requests for 3-D printable open source app...

Due to the ready availability of tree leaves in many geographies, the alternative food of leaf concentrate currently has the potential to al...

global catastrophic risk

Our work provides the foundation for what we hope might become a possible solution for reducing the transmission of HIV from mother to child...

medical devices

At a Permablitz you're learning by doing, while getting ideas for your own garden, participating in free workshops, while meeting good peopl...

permaculture techinques

social permaculture

This is a 3D printed Security Siren that could be used in low income areas where theft or other problems are an issue. The purpose of the si...

Lvh33, Regit, Dewhuk, Libero

In the Spring semester of 2019, our Engineering 305 Appropriate Technology course at Cal Poly Humboldt was asked to design the following pro...

ccat active project

Mariarosespronk

Wind PowerW is a prominent 'green' solution to the global energy crisis. Wind power was the most rapid growing source of usable energy from ...

materials processing

This Appropedia Web page was originally dedicated to creating an appropriate technology emergency response to the earthquake in Haiti by HSU...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

near field audio

near field audio speaker

induction speaker

Dave-Peterson, Chriswaterguy

After years of not having much success riding my road bike in the snow, I discovered the seat could be raised high enough on my daughter's m...

In times like these, scientists have been able to utilize LED lights for more than just everyday bulb replacements. With the people working ...

How to make a Hyper Visible Power Meter.

Tedm, Mjmcdonald

The task is to adapt a widely available thermostatic valve for use in the solar water pasteurizer. The thermostatic valve that will be used ...

car part retrofit

thermostatic valve

water pasteurization

Unsafe drinking water is one of the leading causes of sickness in the world. According to the World Health Organization's 2004 figures, arou...

water purification

Dylan, Dave-o-riginal

Our design team, Fujis and Fugees, consists of four Cal Poly Humboldt engineering students. For our Engineering 215 class in Spring 2011 we ...

Used to fix the door

openknowhow.org

Twistedrabbit, Dbf12, Kusondra, Bem34

The project outlined in this page is a small and manageable worm bin designed so that kids ages eight to twelve can recreate it, without the...

sustainable living

This compost was to tend to the waste of a 4 person household in Arcata, California. The house had a garden beginning and produced a fair am...

Ingénieurs Assistance Internationale - Ingénieurs sans Frontières Construction manual of a rice husker Equipment designed and manufactured i...

isf-iai documents

agricultural tools manuals

agricultural processing tools manuals

This page is a project page in progress by students in Mech425. Please refrain from making edits unless you are a member of the project team...

renewable energy

High school shop teachers are on a tighter budget now than ever, and the trades are in higher demand today in local high schools. In wood sh...

Mitra, Achannel, Aps11, Gduff2

Our wall, the south facing wall, will be constructed of cob and recycled glass. We chose cob as the material to use for the south facing wal...

ccat active project

ccat green shed

JacobWalsh, Emerson joyce29

This tumbling composter is an easy to use, easy to build composting system that can turn your leftover scraps into nutrient rich soil for a ...

Due to a continual rise in the human population and an uncertain environmental future, the concept of housing and available resources must b...

social sustainability

upcycling gallery

wikipedia:Cold cathode Cold cathode lamp (CCFL stands for Cold-Cathode-Fluorescent-Lamp). This is a new kind of Fluorescent-lamp that has co...

The steps laid out below are for the Water Meter designed by Team X for the WetLand Barge

water monitoring

monitoring and evaluation

MRCJ, Jthiller, Dtp13

For this project I made a box out papercrete for an on-campus office supply recycling service called R.O.S.E.. The goal of the project is to...

earthen construction

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. The fiber o...

open source optics

open source hardware

optic cable holder

fiber optic cable holder

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Nuestro equipo de diseño, 'Fujis and Fugees', consta de cuatro estudiantes de ingeniería de Cal Poly Humboldt. Para nuestra clase de Ingenie...

Lasercut house model - For imporved earthquake resistance (Build change house)

openknowhow.org

Paulacosta94, Ehigs, CarmenT

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

stepping stones

redwood coast montesori

Jlc999, Aja502, Chriswaterguy

The client is Zane Middle School, located in Eureka, California. Zane Middle School is a 'STEAM' (Science, Technology, Engineering, Art, Mat...

Passive Solar Greenhouse in Lake Tahoe, Ca (Half Soil/Half Aquaponics).

sustainable farm energy alternatives

First of all, please make sure you've read the Ebola page. This is a tiny part of a bigger process: we look at needs, think of ideas, protot...

This quick square or carpenter's triangle is a product that can be found relatively cheap at most hardware stores. This product allows the u...

computer-aided design

carpenter's triangle

MirAli Ghassemi

Every Summer, due to the increased temperature, many regions including Tabriz city in Iran experience electricity shortages. Predicting the ...

machine learning

supervised learning

Rjc21, EricRecchia

A Bicycle Rodeo, or Bike Rodeo, is a bicycle safety event for children, generally ages 6-14. Events can include lectures, workshops, inspect...

Dcc88, Kinzer, Lal38

This photovoltaic system was designed to power a DC Vaccine Refrigerator at the hospital Centro De Salud in Parras, Mexico. Centro De Salud ...

battery charger

charge controller

Jameswberry, Mayank Moon

Conserving water is becoming more of an important issue in today's world. An open-sourced sprinkler attachment for a hose can lead to less c...

water conservation

For full details see MethodsX paper: Fabricating Ordered 2-D Nano-Structured Arrays Using Nanosphere Lithography cleaning: Si wafer or glas...

chenlong thesis

For the OSAT (Open Source Appropriate Technology), I chose to create a limb prosthetic as I felt it was a technology that is needed at a low...

custom hand prosthetic

osat 3d-printable designs

This OSAT is a Micro Lathe. While in Beta, it is nearly parametric in order to scale to the supplies on hand, and can be altered to meet the...

symmetric cutting

Proprietary metal 3D printing is still relegated to relatively expensive systems that have been constructed over years of expensive trial-an...

metal 3d printer

tungsten inert gas welding

open-source appropriate technology

circular economy

sustainable development

distributed manufacturing

open source hardware

materials science

particle swarm optimization

Leaf Protein Concentrate (LPC) is a protein rich substance similar to a curd or cottage cheese. LPC can be made from many varieties of leafs...

leaf protein concentrate

Flores 01, Ale Torres

Modelo de Negocio para Jardines Verticales fundamentado en el proyecto CCAT vertical garden de estudiantes de California. Una propuesta econ...

modelo de negocio

An electric hand-whisk is a handheld mechanism used for whisking, beating or stirring different liquids. It generates this whisking or mixin...

'An ecologic diet, like green living, is not about absolutes. It's about doing the best you're willing and able to do – and nurturing a will...

It is spring. And that means your friendly honeybees may be running low on their stored honey reserves, but what to do before the flowers st...

Producing sugar from lignocellulosic biomass is a promising resilient food solution to counter the near-total global failure of food product...

repurposing of factories

sugar from lignocellulosic biomass

resilient food. food security

global catastrophic risk

existential risk

This is a two tank, gravity-fed rain water irrigation system, using Arduino as controller/timer. The system can be used for indoor or outdoo...

rianwater catchment

rainwater irrigation

dirty water submersible pump with float

rainbird flexible tubing

Students in Introduction to Design (Engr215), at Cal Poly Humboldt, worked with Locally Delicious to design, build, test and disseminate pro...

The Applied Sustainability Group at Queen's University in conjunction with the Sustainable Energy Applied Research Centre (SEARC) at St.Lawr...

Proper growth of infants and young children is paramount to the development of well-functioning adults. Hospitals in developing countries la...

child development

measuring device

Problem being addressed: Standard 4-wheel wheelchairs are effective for flat surfaces and can be manufactured inexpensively, but are not ide...

Ltpayne, Cblouisa

El Nuevo Sol is a daycare facility located at 30 Cinco de Mayo for children from 2 months old to 10 years old. It is owned and directed by S...

rainwater catchment

Alyssa Knoester

The OSAT piece is a universal chain guard for a bicycle. It improves the safety of a bike for people who may not have access to a new bike o...

bike chain guard

Paramedic design generates a barbed hose adapter for any ID tubing

openknowhow.org

Flock House, the client, contacted Cal Poly Humboldt to build various parts of a new alternative living structure in New York City. Team Eco...

migrating people

tent alternatives

sustainable shelter

corrugated plastic

upcycling gallery

DIN ISO 228 (DIN 259) BSP Standard Pipe Thread 20mm

openknowhow.org

The ratchet is a fairly common tool in today's world. A major advantage of a ratchet is that many tool attachments can be put on the ratchet...

osat 3d-printable designs

Papermaking is an ancient art and science. Some new research is rejuvenating the art and science of hand made paper (HMP) to a new and excit...

With the surge of interest in nano-satellites, there is a concomitant need for high quality, yet affordable simulation and testing environme...

open source hardware

additive manufacturing

attitude simulator

spacecraft simulator

Julian Stirling

Simple illumination for the OpenFlexure microscope. This is simply a mounted LED and resistor.

Sendog6913, Bart2

The Human Energy Converter (H.E.C.), a pedal powered electric generator that harnessed the pedaling effort of 14 people at one time. The H.E...

Snaffles, or more commonly referred to bits, are the metal pieces that riders use to give commands to their mount. For this particular page,...

modular snaffle

animal husbandry

Makeup & Skincare Bar

El maquillaje y el skincare son parte de la rutina diaria de muchas personas. Sin embargo, los productos comerciales generan, en su gran may...

A clamp is used in many stages of manufacturing and assembly. Holding things in place during these processes will yield higher quality parts...

The most famous and most successful solar solar concentration system in the world is the Scheffler solar kitchen. They are great because the...

The Full Belly Project (FBP), has designed a Universal Nut Sheller (UNS) for distribution throughout West Africa and Haiti. The UNS shells l...

universal nut sheller

Hjg109, Adw358, Rcthomas21

interactive concrete sundial

Although SODIS have been well tested - this pre-filter has only been bench tested. To address the widespread need for safe water for drinkin...

water treatment

The Campus Center for Appropriate Technologies (CCAT) is a student run organization that promotes sustainability through an environmentally ...

greywater system

The Hankey House at Rancho Mastatal was designed by Rob Hankey and utilized various natural building techniques in its design including post...

travel internships

earthen construction

earthen plaster

bamboo construction

alternative building

wattle and daub

J.M.Pearce, Mcm781

A promising approach to reducing the >870,000 deaths/year globally from unsafe water is flow-through solar water pasteurization systems (SWP...

distributed manufacturing

heat exchangers

solar water pasteurization

water pasteurization

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

The goal of this project was to build a low-embedded energy amphitheater for Friends of the Dunes at the Humboldt Coastal Nature Center. The...

Rapid expansion of the solar photovoltaic (PV) industry is quickly causing solar to play a growing importance in the energy mix of the world...

producer responsibility

pv manufacturing

Simple 3-D printable open source hardware designs have proven to be effective scientific instruments at low costs. Further development in th...

open source hardware

optoelectronics

Proper growth of infants and young children is paramount to the development of well-functioning adults. Hospitals in developing countries la...

The OSAT is Drip irrigation assembly combining the stake and drip emitter with tubing. The Drip Irrigation Stake fulfills the purpose of pro...

drip irrigation

Camila Figueroa, Isis Carrillo, Sebastiansegoviac, Ferascmz, Fátima Meléndez

El proyecto se basa en la innovación del agua purificada busca innovar el área de aprendizaje con el fin de crear un impacto, sobre la impor...

purificación de agua

Pasionek, M.Smith, S. Haselhuhn

This is a speculative class project and needs to be refined before being deployed at any scale. One of the hottest products on the market i...

apple iphone 4s

Welcome to our straw bale greenhouse. The following page will take you with us on our greenhouse building adventure. We will discuss the pro...

earthen plaster

sustainable farm energy alternatives

Prosperity Without Growth is a report by the UK's Sustainable Development Commission[1] by economist Tim Jackson. It has been revised and re...

bottle retrofit

Chi.Bio is the open-source robotic platform for experimental automation in biological science research and education.

biological process

For examining the external canal and tympanic membrane of the ear

openknowhow.org

OSAT is technology that can be used to help advance third-world countries, but in ways that makes the most sense to those areas. For starter...

angle measurement

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

solar hot water system

A 3D-printed jig to uniformly illuminate the Raspberry Pi camera module's sensor, for the purpose of calibrating its response to different c...

Sterilizing medical instruments from disease-carrying organisms requires both heat and pressure. This is normally accomplished by 20 minutes...

sterilizination

medical equipment

solar autoclave

solar hydrothermal

sustainable living

Project to make a stand for SLA device.

Nitrate, the most oxidized form of nitrogen, is regulated to protect people and animals from harmful levels as there is a large over abundan...

nitrogen testing

open source hardware

portable photometer

open source scientific hardware

This article features instructions on how to build a fixed batch heated air drying bin from local materials. For further information on rice...

food processing

international development

How to connect to the internet with ASUS USB-N device guide.

This is a web page for the Engineering 242s personal Appropedia project. Its goal is to document our experiences and progress as we accompli...

Marjolein v.d.Male

Ensures blood entering the body is at the correct temp to prevent hypothermia

openknowhow.org

Drinking arsenic-contaminated water leads to a series of health problems that has limited development for the largely poor rural people of P...

water purification

Innovación comunitaria encontrada en la comunidad Conchalio, que consiste en la construcción de un muro alrededor de los ranchos y viviendas...

solución comunitaria

mapeo de soluciones

Notre équipe de conception, 'Fujis et Fugees', est composée de quatre étudiants en ingénierie de Cal Poly Humboldt. Pour notre classe d' ing...

An open-source 3-D printable laboratory sample rotator mixer is developed here in two variants that allow users to opt for the level of func...

laboratory sample rotator mixer and shake

open source hardware

This is the Operation and Maintenance (O&M) manual for CCAT greenshed west wall. Please refer to it and keep it up to date with any O&M chan...

ccat active project

earthen plaster

alternative building

Parna, Paola lira

In designing this device, our goal has been to engineer a simple solution to a complex problem in the developing world. Our proposal is to d...

medical devices

thermal insulation

energy efficiency

Even though agriculture is an integral part of rural livelihoods of communities all over the world, there are many instances when farmers in...

rainwater harvesting

water proof cement

Ecuador has an opportunity to radically reduce the cost of experimental research in the sciences while improving scientific tools by impleme...

open source hardware

BradyKatelynRose

concrete pathway

tessellating tiles

Cassiopeia is a portable and durable computer capable of running completely off solar radiation and able to work without access to the Inter...

NickMeglich, Dustin.Poppendieck

Booklegger has been one of the many shops in downtown Eureka for many years. The owner of Booklegger, Nancy Short, explained to us in her in...

physical education equipment cart

polypropylene cart

FabFi is an open-source, FabLab-grown system using common building materials and off-the-shelf electronics to transmit wireless ethernet sig...

In order to print materials other than PLA, a controlled environment is needed to prevent rapid cooling which leads to plastic warping. Afte...

3d printer modification

Solar thermal collectorsW are apparatus designed to collect the thermal energy of the sun.

solar thermal collector

solar thermal dehydrator

solar dehydrating

solar thermal hot water heater

solar hot water heating

food dehydrator

The solar design t-square is a simple physical device that models the sun passing over a new solar reflector design. Using clay and 'stop mo...

EquipoAlfaBuenaMaravillaOndaDinamitaEscuadronLobo, Knvargas

¿Cómo enfrentarnos a las sequías? Esto es lo que el Sistema de Riego por Goteo Automatizado busca dar una respuesta. Tomando un modelo base ...

modelo de negocio

Amorphous silicon (a-Si:H)-based solar cells have the lowest ecological impact of photovoltaic (PV) materials. In order to continue to impro...

industrial ecology

energy efficiency

environmental philosophy

waste management

most completed projects and publications

life cycle analysis

PC104 stacks are commonly used in automation and controls applications which could be a potentially hazardous environment for sensitive elec...

Connects a ¼" BSP female thread to a female quick release

openknowhow.org

The Water Planning Tools is a research and development project which develops tools to assist communities and governments as they address ch...

australian organizations

High Temperature 3D Printer for Open Source Hardware Enterprise. The objective is to provide a low cost, open source solution for 3D-printin...

high temperature 3d printer

All industrial processes generate waste. The form of this waste can be in discarded items, unused materials, or waste energy which is not us...

industrial ecology

energy efficiency

environmental philosophy

waste management

food production

sustainable farm energy alternatives

Monetary and supply aid efforts to third work countries offer a temporary solution to permanent problems. In an effort to provide a sustaina...

queen rearing kit

Evolution number 9

The word 'Synergy' comes from the Greek words for 'to work together'. This project combines the existing parabolic shape and comfortable sit...

parabolic solar cookers

The central kitchen of Mumbai Port Trust (MBPT) distributes food to approximately 3,000 employees daily, generating valuable amounts of orga...

urban agriculture

The following is a statement from the Appropriate Infrastructure Development Group (AIDG) about biodigesters and how they work: 'Unlike a se...

Pea picking is a common practice across the United States and around the world. People grab their family's and head out to the field to coll...

The Microfarm is the other key feature of the Open Home that helps it function as an engine of self-sufficiency. A Microfarm is a small inte...

vertical garden

Lupine, Goldiebrittney, Kan324, Lonny

The earthen oven at the Blue Ox Millworks in Eureka, California was constructed in 2004 by Appropriate Technology (Engr305) students at Cal ...

This adjustable ankle support prosthetic has been designed to be used as an appropriate technology, due to being composed of 4 3D-printed pa...

Ricardogomar, Nolascogaby, DavidCordero, Andrearodriguez

Los humedales artificiales son un sistema innovador, sostenible y natural de depuración y reutilización de aguas grises. Con este sistema se...

modelo de negocio

Students in Introduction to Design (Engr215), at Cal Poly Humboldt, worked with the Redwood Coast Energy Authority in Spring 2010 to build e...

educational boxes

Maxime Zimmermann

Two-photon (2P) microscopy is a cornerstone technique in neuroscience research, but combining this technology with spectrally arbitrary ligh...

githubusercontent.com

visual neuroscience

2 photon microscopy

Biodiesel is an environmentally friendly alternative to petroleum diesel. The biodiesel produced at CCAT is made using used vegetable oil fr...

This is an interactive exhibit that demonstrates how the forces of nature contribute to the formation of sand dunes. This page is focused on...

dune moveement simulator

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

This technical brief is intended to advise small-scale producers on the methods and equipment needed to package foods in glass jars and bott...

RicardoAvelar, Alfredguillen1, MiguelFuentes99

Esta artículo describe todos los aspectos de la Estación de lavado de manos callejera portable diseñada por estudiantes de la Escuela Superi...

estacion de lavado de manos

handwashing station

This OSAT is a Micro Lathe. It uses an open source three jaw, self centering chuck, which can be found here. The frame, while in Beta, is ne...

symmetric cutting

A simple Roberval measuring scale design that can be adjusted to support different weight multiples. By design, the exact positioning of the...

measuring scale

A thesis submitted as part of the Masters program in Engineering (Public Health) at UNSW.

built environment

David W, Dustin.Poppendieck

Redwood Coast Energy Authority offered many local businesses an opportunity to achieve higher energy efficiency. By tracking a company's ene...

WetLand is an art installation on the Delaware River, for more information visit the Appropedia page: WetLand. WetLand is supplied with elec...

energy monitoring

In 1990 Bart Orlando took the propane powered chevy 350 engine out of his motorhome, parked it in Arcata and purchased a 10 speed Motobecane...

electricity generation

How to make a shoebox size vermicompost.

Steffan Miliucci

Mosquito bed-netting represents the most inexpensive way of effectively eliminating mosquito bites while sleeping. In many developing countr...

I have created a rain chain for gutters of houses. I have seen these used on houses before when a gutter continuously overflows and water pu...

electric lighting

To divde an open area creating privacy and personal space

openknowhow.org

Alexanderpf, Stef

This article assumes that the input for the desired low voltage power supply is alternating current (AC) and that the power supply will be o...

computer power supply

electric connection block

Adjustable Monochromator. A monochromator is a device which takes light and transmits it to into a narrow band of wavelengths. Using a form ...

electric lighting

science equipment

This is a Fume extractor for laboratories to extract fumes of soldering. Below, i present a cheap and reliable alternative to $150-$300 comm...

laboratory fume extractor

Clean water is necessary for every person on the planet however without access to a means of treating source water, many people go without c...

water treatment

water filtration

moringa oleifera seed extract

water and sanitation for developing countries

Bcr8, Hbaker322

This page discusses Bags of Shelter, an earthbag shelter designed for World Shelters to use as transitional shelter for people in Haiti affe...

prolypropylene bags

Gotbisson, Aaron Gallo

Cal Poly Humboldt is striving to meet its sustainability goals through a series of campus wide projects. One of these goals is to reduce the...

33 gallon plastic barrel

plastic trash bags

Tnetjes, Jaj47, Tierra, Toesfeet

The construction of the DIF senior center in Parras began in 2006 after DIF approached Cal Poly Humboldt to request assistance with the proj...

María, Valeria Benítez, Gabrielassm

Smart Gas es una propuesta de modelo de negocios que consiste en una app para conectar hogares que entreguen su basura orgánica y para obten...

The Stethoscope is one of the most basic medical tools. It allows a trained medical professional to diagnose issues with the heart and lungs...

medical equipment

CourtneyOto, Cp56, Dane.Noland

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

vertical garden

Used to fix the new baby incubator door

openknowhow.org

This device is meant to be a simple addition to a dwelling with a pre-installed eavestrough and gutter system. The system consists of a barr...

built environment

construction and materials

rainwater catchment

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

vapor deposition

The Environmental Resources Engineering Program at Cal Poly Humboldt that have been given the opportunity to create a bicycle powered blende...

fordom flex shaft

The Quake Safe is a method of making adobe houses safer in earthquakes. It is a frame made from string, bamboo (or other available wood; ie ...

earthquake safety

A Review of Solar Photovoltaic Levelized Cost of Electricity Abstract As the solar photovoltaic (PV) matures, the economic feasibility of PV...

qas completed projects and publications

most completed projects and publications

Jfkmariana, Erickvf012

Clipetes es un producto innovador en temas de uso cotidiano para esta nueva normalidad que estamos viviendo, ya que desde el año pasado que ...

modelo de negocio

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Andre Maia Chagas

a voltage amplifier based on LM741, run with 9V batteries and shaped as an Arduino Due shield

githubusercontent.com

A bicycle is a common form of transportation in developing countries. It is relatively cheap, fast, and effective. Since bicycles are used f...

When trying to decide what type of renewable energy makes the most sense for a given application - thermodynamics should be our guide. Speci...

most completed projects and publications

energy conversion

solar hot water

Haverstraw Water Supply Project I. Overview Rockland County has encountered phases of inadequate water supply since the 1990s, due to period...

Handlebar grip for a bicycle developed by Abhijeet Divekar This part was built to meet the needs of one of our professors; Dr. Greshenson, t...

bike handlebar grips

Ajvincen, Zsarnold

The goal of this project is to be used by a 3D Printing service to accurately determine prices of prints based on the amount of material use...

This is a project page of the Rope Winding Robot, as designed by Logan Derry under FAST Labs at Western University

This is a new MTU project that looks at technologies that can be used to improve rural livelihood strategies and sustainability in rural com...

rural communities

social sustainability

ERDC's Kim receives USACE, ERDC Researcher of the Year Awards. Dr. Byung J. Kim, U.S. Army Engineer Research and Development Center's (ERDC)...

The WetLand bog can provide sustenance, promote increased water quality, provide habitat and will serve as a working educational platform. W...

Nicole Vincent designed a rainwater catchment system for the residential property located at 1402 M St in Eureka, California. The owners of ...

rainwater catchment

Krmichae, Ejschaef, Afthiel

Hydrogenated amorphous silicon (a-Si:H) is a semiconductor material that is primarily used in industry for the production of photovoltaic ce...

industrial ecology

hydrogenated amorphous silicon

energy efficiency

environmental philosophy

waste management

Lonny, Mvecchitto, Nikki, Gotbisson, Katie.harris, Xcountry

The 2012 Spring semester class of Engr370 Energy, Technology and Society continued the 2011 Cal Poly Humboldt Paper Towel Diversion Project....

Our small team has been working on this project since December of 2011. We now have a working model but still need technical help in making ...

solar thermal energy

Elc25, AYarberry, D.shoenhair

This page summarizes life cycle assessment (LCA) studies that focus on how cloth and disposable diapers differ in cradle-to-grave impacts. L...

life cycle analysis

disposable diapers

Lo08, Tdh20, Jrf58

The Greywater Island project is a proposed Greywater treatment system for the Samoa Cookhouse and Hostel. As part of the sustainable operati...

Jmr219, Israel951, RogerT

outdoor math classroom

coordinate grid

1:150 scale model of 20ft container for assessing the design or layout of a facility

openknowhow.org

This Hand Pump Drill is a mechanical drill that utilizes human effort to perform the functions of a drill. In locations where power tools ar...

spring loaded drill

ElisabethJ, Holly.leopardi

Boll Weaver (Figure 1) is owned by Crystal Dobbs (Figure 2) and has been in Eureka, California for 15 years. Boll Weaver is a textiles cente...

DantheNatureMan, Ejv15, Stephen Schafer

Earlier research found that 3D morphologies developed using a low-cost microwave synthesis technique were not retained during the transforma...

dye-sensitized solar cell

power conversion efficiency

materials processing

titanium dioxide

The Highpoint I apartment building, built in England in 1935, is modern-looking, forward thinking for its time, and widely praised.

Maidandre, RutGMendez, Siliézar

El proyecto 'Perfilamiento de comunidades y mapeo de soluciones relacionadas con el acceso y uso del agua en la zona costera del Departament...

mapeo comunitario

community mapping

The Full Belly Project is a nonprofit organization based in Wilmington, North Carolina. Founded by Jock Brandis in November of 2003, The Ful...

polymer recycling

pressed plastic

This project is appropriate because it uses post-consumer containers and an easily 3-D printable part to replace the need for manufacturing ...

needle disposal

plastic bottles

I have designed a small Bike seat and seat post that can be used to replace an original bike seat. I believe this could be beneficial to peo...

The Cal Poly Humboldt Office of Sustainability and Schatz Energy Research Center are planning future development of: an electrical vehicle c...

Mcm781, Chriswaterguy

A solar refrigerator has been developed by the Appropriate Technology Collaborative (ATC). The purpose is for storing vaccines, but it could...

appropriate technology collaborative

solar powered refigerator

charcoal and ethanol or methanol

Demotech (anna)

Why should education be improved for the billions of impoverished students worldwide? Because progress for these impoverished students is de...

electric lighting

Organic farms speak to the conventions of the modern world, and the way we eat our food. How the farmers on these CSAs go to the bathroom al...

waste management

CCAT is utilizing the American Hydroponics NFT 48 hydroponics system. American Hydroponics is a local hydroponics company in Arcata, CA. The...

Note! This page is a work in progress. Not all information and content has been uploaded. Please stay tuned. This project aimed to give the ...

3d printer modification

To dispose of sharp items

openknowhow.org

C Blair, K.laciak

RepRap[1] is an open-source 3D printer, presently under community development. It is being designed to produce as many of it's own parts as ...

1-WEEK INNOVATIVE NATURAL WATER MANAGEMENT WORKSHOP An action-learning immersion in water security, integrated systems & increased resilienc...

water filtration

The Sheba water filter is a new water filter design which should address four common problems of household water filtration in less develope...

affordable water filter

cloth filtration

stacked bucket purifier

water filtration

forced filtration

Bicycles are a mode of transportation used throughout the world. There are 3 pieces of a bicycle that interact with the users. They are the ...

At the begining of the semester our group was going to do a different project. We were going to help redesign the oncampus composting progra...

ccat active project

This OSAT project is appropriate for countries where bikes are heavily relied on and cheap spare parts are helpful and necessary. In many co...

This method of mosquito control involves the use of water containers inside/outside households as well as other buildings, regularly replace...

mosquito control

This is the Operation and Maintenance (O&M) manual for CCAT Data Collection. Please refer to it and keep it up to date with any O&M changes....

ccat active project

With most American homes today, all used waters are flushed down the toilet and go on to the water treatment plant. Unfortunately, only some...

Edwin En-Te Hwu

I am sharing 12 types of nanopositioners, from thumb-size actuator to 18 axes nano-probing station, CAD and Arduino-based controller designs...

openhardware.science

nanopositioning

atomic resolution

atomic force microscopy

scanning electron microscopy

This segmented design is able to account for the variations in stud width (Metal Stud = 1.375 in., Wood 2x4 = 1.5 in.) and stud-center to st...

wall framing spacer

Pierce Mayville

This page describes the open source design of an enclosure for open source RepRap-class 3-D printers. Designed to minimize warping and crack...

Georgedappilly, Chriswaterguy

Diabetes is considered a syndrome rather than a disease by modern medicine. It remains a companion to the grave - once diabetic always diabe...

diabetes mellitus

appropriate technology

This project is a hand shovel. It can also be scaled up easily into a normal shovel. This fulfills a need where people need a shovel or don'...

Kmw80, Hbaker322, SSarah, BethEschenbach

The purpose of this Appropedia page is to educate the public about the Cal Poly Humboldt chapter of the national organization Take Back the ...

EmilyWolbeck, Mntianen, Thepfner

This is a speculative class project and needs to be refined before being deployed at any scale. In 1968, scientists, Robert Noyce and Gordon...

intel processors

Morningglory82, Msb52, Mhess92

The Bayside Park Farm is a three-acre vegetable farm located in the City of Arcata's Bayside Park and became the first Community Supported A...

Sam uk, J.M.Pearce

This project is to develop a low-cost open source heat pump for the purposes of reducing fossil fuel use for heating to reduce climate forci...

energy efficiency

Engraver mod on the Athena II printer allows you to engrave various designs on acrylic sheets, plexiglass, cardboard and/or wooden surfaces....

3d printer modification

micro mini electric hand drill

The purpose of this page is to show off the Alternative Transportation Wheel that our ERE215 group built for Friends of the Dunes. Our main ...

The City of Tlacolula, with about 20,000 residents, is served by a highly insufficient pond wastewater treatment system. Currently, the plan...

Solar chimney's are extensively used, but this design has not been prototyped. A solar or thermal chimney is a form of passive ventilation t...

heating and cooling

passive ventilation

Energy Efficient Kerosene Burners is a project by Servals Automation Pvt Ltd. It addresses an economic and global priority - conservation in...

improved cook stoves

kerosene burners

low carbon initiative

carbon footprint

energy efficient cooking

energy efficiency

The idea of a hot shower outside on a cool summer night is very appealing. CCAT developed just the thing for the occasion! Several versions ...

Hii ni mbinu ya kuunga fito kwa kutumia makopo chakavu, kama makopo ya bati yaliyokwishatumika.

Ltpayne, Tebie, Steven M.

Welcome to the CCAT Greywater Marsh Project Continued!

metal mesh screen

Transports 80 litres of drinking water

openknowhow.org

This OSAT prototype is a community comment box where members can drop in comments that can not be removed other than by removing the lock fr...

With the green lifestyle on the rise all around the globe, it is no wonder that we see green living companies starting to pop up everywhere....

internet resources

Bf36, Sjg20, Russellddn

Our team worked with the Westside Community Improvement Association (WCIA) during the 2012 Spring semester at Cal Poly Humboldt for the Appr...

Priyanka Gharat

Water purification, a process by which undesired chemical compounds, organic and inorganic materials, and biological contaminants are remove...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

This is an Ergonomic Ice Scraper. This is a very cheap alternative to buying expensive ice scrapers. It fits in your hand nicely and also wo...

Biking is not only an enjoyable hobby or exercise, but a practical and sustainable way of getting where you need to go. Biking at night can ...

BrentSanders, BethEschenbach

A KillAWatt meter is a consumer level tool typically used when performing an Energy auditW. This device is capable of measuring volts (Figur...

energy conservation

energy efficiency

Calipers are a useful tool because they provide a bit more accuracy than a standard ruler. This design is 3D printable, and can be modified ...

Brhubbar, J.M.Pearce

This study provides designs for a low-cost, easily replicable open-source lab-grade digital scale that can be used as a precision balance. T...

open source hardware

additive manufacturing

distributed manufacturing

laboratory equipment

Manual Centrifuge Apparatus is a scientific equipment which is widely used in chemical and clinical labs all around the world. This apparatu...

High demand for photovoltaic (PV), battery, and small-scale combined heat and power (CHP) technologies are driving a virtuous cycle of techn...

electric utility

distributed generation

energy production

heating and cooling

Solar Powered XO Laptop - the use of photovoltaic technology

A reciprocal frame is a class of self-supporting structure made of three or more beams and which requires no center support to create roofs,...

Sendog6913, Alexe31, Wkaris

The yurt at CCAT, as pictured above, differs in design from both traditional and imported styles of yurts. The most notable differences are ...

ccat active project

AlanSan, Samsnook, Law410

Project Growth is a garden-to-kitchen system designed in Cal Poly Humboldt's Engineering 215 class. The garden provides some salad greens fo...

community garden

gardening lessons

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. This is a p...

open source optics

open source hardware

Solar cookers are not a new idea. Designers as far back as the 19th century recognized the potential of the sun's energy to provide heat for...

This OSAT Project helps multiple goals, primarily goal 10 by helping to make bike transportation more accessible and to decrease the cost an...

Como proyecto final reconstruimos un sistema de reutilización de aguas grises en el CSA de Arcata Educational Farm. Las aguas grises o aguas...

constructed wetlands

C0nrad, Sclarsen

Water is one of the most important aspects of life all over the world, arguably the most important. So it is critical to have a robust infra...

gardening tools

This project is about building a new kind of rural home (a.k.a. Gojo in the local term) that also act as a rain water collector and storage.

La progettazione della maggior parte dei sistemi di biogas può essere ricondotta alla China Fixed Dome (CFD) con oltre 6 milioni di sistemi ...

renewable energy

This page contains methods on the topic of 'smart' solar shades using PV. To see the literature review of this topic, click here The 'Smart'...

energy conservation

motorized blinds

automatic blinds

temperature sensor

energy efficiency

Several studies have indicated potential of producing consumers digitally reproducing open source designs with 3-D printers to offset purcha...

additive manufacturing

distributed manufacturing

decentralized manufacturing

peer production

Cw257, Za20, Dhelliwell

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

recycled concrete

upcycling gallery

I made this still to determine the cost inputs and energy outputs of small scale ethanol production from local and conventional sources. I u...

10 gallon barrel

stainless steel

This project consists on the design and elaboration of a device that can plot an I-V graph to show the I-V relationship of silicon PV panels...

Three-dimensional (3D) printing in soil science is relatively rare but offers promising directions for research. Having 3D-printed soil samp...

fused filament fabrication

open source 3d printing

3d printing; additive manufacturing; soil structure; modeling; slicing; open-source image processing software

Rok duncan, Conejitabri, Gabbytmb, Evolution number 9, Carrienoburden, Lonny

Directing and capturing rainwater is an ancient science that is still in practice today. In regions where water is scarce during a few or al...

Desuku es una mesa minimalista, práctica y funcional, diseñada para satisfacer las necesidades de las familias apoyadas por TECHO.

fabricación digtial

El mal uso del recurso hídrico es uno de los grandes problemas que se pueden observar en varios países en el mundo, aún más el como es infra...

modelo de negocio

OSAT stands for Open Source Appropriate Technology and this tool is a clever solution to a age old human need for fire. Using your bare hand...

This is a 3D printable hand drill which can be used to drill holes in any soft material such as wood. This design is based largly of old ant...

T.hop, Lily Brook, Rlm134, Sami

We are a group of four Environmental Science Students who constructed a shingled yurt roof by reusing old cans that would have otherwise bee...

Makala hii inahusika na uundaji wa mfumo wa kuchuja maji wa gharama nafuu sana. Uchujaji maji unaweza kufanyika kama kuna njia chache ama ha...

Download ECM now! In many organizations, significant resources are allocated to having employees travel to meet new and existing clients. Th...

energy conservation measures

energy efficiency

desktop videoconferencing

For the first version see open-source metal 3-D printer (This is actually version 3, although we use two - this is better so start here)

open source optics

open source hardware

metal 3d printer

Joe Raftery, Vinay Gupta

When the Hexayurt is used in a hot climate it will get hot inside. The heat comes from four sources: Solar gains due to sunlight warming th...

thermal insulation

energy efficiency

heating and cooling

MirAli Ghassemi

Ttg37, Lexington333

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Janoah59, Cbcoutinho

Tailwaggers Thrift Shop, as seen in Figure 1, is a small retail thrift store located in Eureka, California. The store sells used merchandise...

The pedal powered mechanical blender was designed by Bart Orlando and built with the assistance of Saremy Graves, an HSU student who receive...

food preparation

A.Dacho, Gaiatechnician

The pulser pump is a simple, water powered mechanical device, also known as a bubble pump. Components of this pump have been used for variou...

tubing connectors

three way connector

Polypropylene (PP) filament is a new semi crystalline thermoplastic used in Fused Filament Fabrication (FFF). PP filament has a high level o...

polypropylene filament

semi crystalline thermoplastic

The CCFL (Cold Cathode Fluorescent Lamp) inverter works in general the same as other converter systems in a much smaler scale.

cold cathode fluorescent lamps

3rd world arm lamp

electric lighting

Redbeard, Andrea

This page is a gallery for Humboldt greenhouses

sustainable farm energy alternatives

humboldt at gallery

appropriate technology files

The Sanctuary Arcata is project of Creative Sanctuary, a 501(c)3 non-profit in Arcata, CA. It is community space of art, music, food, and ma...

sanctuary arcata

service learning

Gurchs, Evashiu

Designing a drone boat to clean up the Great Pacific Ocean Garbage Patch. [expansion needed] This is the problem: Ocean_Pollution - Great P...

Threaded adapter connects ¾” & ½” BSP threads

openknowhow.org

Welcome to the quick and dirty gravity fed drip irrigation system tutorial. This particular model (version 1.0) was built for CCAT to supply...

Carrienoburden, 1Humanity-1Future-1Purpose

5 billion people world wide lack access to basic sanitation. This results in illnesses and deaths including 2 million deaths a year due to d...

This is a planter with a water collection point. This removable cup allows for the easy collection of water to reuse for whatever is planted...

water catchment

water collection

A Recipe To Live is an indoor climate natural building project designed by students Masaki Ogasawara, Keisuke Tsukada and Erika Mikami of Wa...

alternative building

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

The purpose of this design is to allow people to grow fruits, vegetables, and herbs close to their home with minimal space and water usage. ...

vertical garden

osat 3d-printable designs

This is a solar charger or an emergency light. The case design is open source and can be fabricated on an open source 3-D printer. It runs o...

emergency light

energy efficiency

energy conservation measures

Substitute for national grid or heavyweight solar with: One 80 watt panel connected to a 15 minute AA battery charger (e.g. the new generat...

renewable energy

battery charger

El Tippy Tap es un dispositivo simple para el lavado de manos con agua corriente.

bidn de 5 litros

To aid in safe and easy transfers between wheelchair, bed or chair

openknowhow.org

Included below is three different designs for PET bottle shredders currently designed for 20oz soda bottles but easily expandable for use wi...

plastic shredder

Buckles are very useful and found on a wide variety of items; however, if one breaks, it is hard to find a cheap replacement. Since buckle s...

Felicity Tepper, Aleiha

Knowing how to sew by hand is not only a valuable way of keeping alive an age-old tradition but it comes in handy when you're not able to ac...

AllieMarie, Humboldt21, Mkdanies

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

rainwater catchment

Jbader, Jmr214, Lonny

This page represents 'Team U^s's' bike-powered energy project for Flock House. 'Team U^s' is a group brought together through Engineering 21...

renewable energy demonstration

charge controller

electricity generation

Mrs72, Akr57, Lonny

The Arcata Educational Farm was established in 1993 and is located in Bayside Park at 930 Old Arcata Road. The AEF farm functions by allowin...

arcata educational farm

This 3D printed pan is the beginnig of your own cast iron pan at home. Foundries use 3D printed model to begin prototype molds to ensure tha...

My project was to create my own Indoor garden which can be grown indoor during winter months. Once garden is fully grown, it can be hung up....

urban agriculture

Problem 'In developing countries spinal cord injuries are normally (80%) followed by death within 2 years as a result of pressure sore relat...

El Pedal Desk es una herramienta creada para que los estudiantes puedan tener actividad física y hacer sus tareas diarias, mientras generan ...

modelo de negocio

Alfalfa sprouts are those little wiggly green things you get on fancy sandwiches and salads. They're chock-full of nutrients and kinda fun t...

Extreme solar storms, high-altitude electromagnetic pulses, and coordinated cyber attacks could disrupt regional/global electricity. Since e...

global catastrophic risk

alternative food

Biodigesters are a technology used to help small farmers treat animal and human waste, while providing fertilizer with reduced pathogens for...

project testing

Andre Maia Chagas

The open visual stimulator is a projector system that can take up to six different leds with any chosen wavelength and project images, video...

githubusercontent.com

visual neuroscience

Herbs, spices and chillies are produced in India and Brazil extensively. But lack of simple and cost-effective technology is a big issue in ...

Jump rope handles. What more is there to be said? Kids who need exercise and either can't go running or can't leave the house can use these ...

Cew52, BethEschenbach, Uncletrailer

The cogeneration building is located in the front parking lot of the Jolly Giant Commons(JGC)(Figure 2). This building often has a few servi...

energy production

heating and cooling

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

The goal of this design is to allow a lubrication and chip clearing module addition to a CNC router. This system consists of an external uni...

La changa, JaquelynJS

The DIF wanted to construct a space for the viejitos of Parras who do not have families to be able to relax and enjoy a meal and the company...

adobe construction

community center

A.R.Shearer, Cahckm, Sjhawkins1, Mfs158

Cal Poly Humboldt Engineering 305 class volunteered to construct a living roof for Bayside Park Farm a community farm in Arcata, California....

StephTank, Anthony Konieczny, Alex Kampf, Cjtorrez

This is a speculative class project and needs to be refined before being deployed at any scale. The technology that me and my colleagues ha...

lcd pc monitors

This is the Operation and Maintenance (O&M) manual for CCAT yurt. Please refer to it regularly and keep it up to date with any O&M changes.

ccat active project

90 degree connector to hold IEC 309 plug socket

openknowhow.org

El producto final es un mueble diseñado para mujeres amas de casa de escasos recursos. A su vez, se diseñó un juguete para aquellas madres d...

fabricación digtial

The composting toilet at the Campus Center For Appropriate Technology (CCAT) was designed by students in Humboldt State's engr215 class. The...

composting toilets

thermal insulation

energy efficiency

solar powered speaker

sustainable party equipment

This study determines the nuclear pragmatic limit where the direct physical negative consequences of nuclear weapons use are counter to nati...

food processing

food production

It's possible to build a radio station locally with very basic components.

local fabrication

Copy the wiki markup below to your page to use as a template

The device designed for this project was a Low Profile Projector Ceiling Mount. After gifting my parents a projector for a soon to be home t...

classroom projector

Rope pumps are an incredibly easy and cost effective way of raising water to the surface. The main hindrance is the valves that go on the ro...

rope pump valve

Happy Water es un sistema de ciclo continuo que provee agua limpia y reciclada para el lavado de manos, evitando así el desperdicio y mal us...

modelo de negocio

The following is a list of goals, test procedures, survey questions, equipment needed, and abstracts for testing systemwater quality in the ...

project testing

ADePottey, Cftether, Dlwilli1

This is a speculative class project and needs to be refined before being deployed at any scale. This project is centered around the recycli...

For examining the external canal and tympanic membrane of the ear

openknowhow.org

The Queen's Applied Sustainability Research Group and the Webster Group of Queen's University are collaborating on a project to improve the ...

energy efficiency

Enclosure of umbilical cords of newborns to prevent sepsis

openknowhow.org

Simeonr, LBeutler, Hoffbot515

The problem our team identified is the level of difficulty in producing a large quantity of prints. More specifically, it is inefficient to ...

printing automation

galvanized steel sheet metal

The idea of combining a spoon with a fork has existed for years now. For certain situations, this innovation can be more efficient (for exam...

This cloche can be used to protect seeds and seedlings during the colder part of the growing season, keeping them warm and safe from snails ...

growing under cover

sustainable farm energy alternatives

Appropriate technology is designed to be 'appropriate' to the context in which it is used. Most appropriate technologies are sustainable, sm...

facial covering

The challenge rewards appropriate technology and social change projects showing enterprise and innovation at a grassroots level to help bett...

appropriate technology

A tree nursery can be established by a farmer to grow young trees seedlings in optimum conditions, and in appropriate numbers and species. H...

potting material

When using a composting toilet, it is common practice to separate urine from feces. This reduces the smell and pathogens that are present in...

urine diverter funnel

composting toilets

human waste diversion

osat 3d-printable designs

In 2004, HSU Whole Earth Engineering-114 students assisted Bart Orlando in a project to fabricate a bike trailer for the Campus Center for A...

The main focus of this document is to explain how to apply the technology of pedal power a laptop computer. There is a necessity for appropr...

electricity generation

The Rob and Melani Walton Sustainability Solutions Service (RMWSS) is calling on students to help develop a mobile plastic processing educat...

plastic recycling

injection molding

This is a cross-flow turbine, essentially a water wheel turned by naturally flowing water to produce energy. Unlike a dam, or a mill wheel t...

A primary purpose of many dams, both large and small, is to facilitate water diversions. Although existing water supplies can be stretched m...

water conservation

resource conservation

water diversion

Thermal sterilization is generally avoided for 3-D printed components because of the relatively low deformation temperatures for common ther...

additive manufacturing

personal protective equipment

safety equipment

medical hardware

open source medical hardware

high temperature 3d printer

medical devices

3D printed parts are able to be rapidly produced at low cost making them ideal for disposable medical equipment. In areas where advanced med...

Ntkoessel, Chriswaterguy

The U.S. Department of Energy'sW Solar Decathlon is a competitive program in which teams of college students compete to think of, create and...

solar decathlon

Cblouisa, JaquelynJS, Dcc88

This page contains information on different uses of solar energy studied in the Parras 2006 program.

Dlb89, Mrg38, Mnf148, Morgan, JohnJorgeJones

Welcome to the page for the CCAT Earthbag Terrace, located in front of the Campus Center for Appropriate Technology at Cal Poly Humboldt. Th...

natural plastering

Filament is expensive. Recycled plastic is cheap. This extruder allows you to create cheap filament from ground/pelletized plastic. Importan...

This guide provides instructions on how to create a 40 W solar power array with a 120 Wh energy capacity and the ability to supply power to ...

Gduff2, Mm112, A Stack0verflow

CCAT is building a tool shed with green methods in mind so it is called the green shed. Part of this green design is the walls that will be ...

ccat green shed

ccat active project

The objective of this project is to construct a device that aids the students of Zane Middle School in Eureka, California in the understandi...

archimedes screws

physics demonstration

An aquaponics system at Rancho Mastatal grows edible plants and raises fish for consumption. The fish waste provides nutrients for the plant...

travel internships

food production

water conservation

urban agriculture

sustainable agriculture

food and agriculture

P Mukundan, Jthiller

The TLUD stove is a simple wood Stove that is green and of low carbon emission. It is a project of SERVALS Automation Pvt LTD This project ...

biomass gasification

top lit up draft

open fire cooking

Cjf336, Bcreager

This project is a collaboration between students enrolled in the Practivistas Dominicana Program and the rural community of Las Malvinas in ...

flattened steel drums

upcycled billboard tarps

bamboo construction

alternative building

construction and materials

built environment

With a modular setup, this device can be used as multiple tools in one. Main applications could be for people from third world countries whe...

CamilaRibeiroMatos, Nandafranco

Jardim Vertical é um sistema de cultivo vertical no qual promove reciclagem de nutrientes. É perfeito para telhados, pátios, varandas, terra...

vertical garden

Makeshift solar distiller/desalinater with the goal of sustainable drinking water for people who need it In a place where the sun shines ver...

Ana, Ginger, Bart2

The objective of this project is to create a solar cooker out of local invasive species and waste materials. We want to create a device that...

solar water pasteurization

blackberry vines

thin aluminum rods

used bike inner tubes

parabolic solar cookers

water purification

Water contamination has always been a huge problem in Africa, not only in rural areas but also even in some urban areas. The water coming ou...

Simple and easy to produce, temporary housing platform to to aid in living conditions after a natural disaster

disaster relief

disaster preparedness

appropriate technology

Logan hsu, Bryan Schmitt

Redwood Coast Energy Authority (RCEA) asked the Spring 2010 Environmental Resources Engineering Intro to Design Class at Cal Poly Humboldt i...

energy conservation

ace extension cord

outlet power center

plug-to-socket adaptor

energy efficiency

Horseshoes may seem like a fairly common thing, but in third world, or developing countries, access to correctly sized, or new horseshoes ca...

osat 3d-printable designs

Stevenmhopper, Zigzag, Lizzay16, JessElaineRamirez, Lonny

In today's world of American waste, it is more important than ever to re-use and re-purpose food scraps in a way that is environmentally con...

sanctuary arcata

55 gallon barrel

scrap metal street post

Aggressive growth of land-based solar photovoltaic (PV) farms can create a land use conflict with agricultural production. Fortunately, this...

most completed projects and publications

joint production

food-energy-water nexus

Roberto Martínez

El experimento 626, como lo nombra su creador el Dr. Jumba Jookiba, es un alocado alienígena que participó como protagonista de la serie Lil...

Tom van der Vaart

Adapter for connecting a PET bottle to a hose (drip irrigation system)

openknowhow.org

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. See: Zhang ...

open source optics

open source hardware

semiconductor sample holder

Steve.mccrosky, Chriswaterguy

Exposure to airborne irritants and allergens leading to allergic rhinitis (hayfever) can be relieved with a nasal rinse of saline solution. ...

airborne arritants

saline solution

This project was buidt as part of the engr 305 class in the Spring 2015 semester. In order to reduce my impact on the environment and grow s...

Solar Cells are devices that convert solar energy (incident photons) into electricity. So far, Silicon is the mostly used material in the so...

Spring Semester 2018 the CCAT Green Building class performed several weathering and strength tests on a set of alternative building material...

building materials

Felicity Tepper

When you are on the receiving end of a pallet or you find discarded pallets around your neighbourhood, rather than tossing them out or leavi...

unwanted pallets

Desimac100, Jcylwik1, Lonny

Nanostructured silicon surfaces (black silicon, bSi) show great promise in solar cell applications due to their superb absorbance on a wide ...

Keannkline, BlackBox, Ish-Kaysh Tripp

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

spirograph system

galvenized steel piping

The World Radiation Data Centre http://web.archive.org/web/20180905172849/http://wrdc-mgo.nrel.gov:80/ keeps records of radiation of hundred...

Robins were causing shading on the solar panel. This shading was interfering with the efficiency of the panel. This was causing extra work f...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

A professional digital cinema camera built around FOSS and open hardware licenses.

openhardware.science

WHTC Summary - Revised 2/10/2009 World Help Training Center Overview The Central Georgia Convertible Community Project (referred to in this ...

education center

training center

5sg12, 5gc17, HowardMech425, 5aljh

Vending machines operate 24 hours per day, seven days a week and can use large amounts of energy throughout those hours of operation. In add...

A bike seat is a simple, but necessary part of a bike that holds most of the weight of the biker. In many developing countries, biking is th...

This project is a 3D printable design that enables very fine (sub-micron) mechanical positioning of a small moving stage, with surprisingly ...

micromanipulation

CarolineJane25, Kelsey Summers

Students will have the opportunity to work with the McKinleyville High School (MHS) students and the Humboldt County Office of Education (HC...

This is a coppice and shrubland guild designed for a water receiving low spot at Foxhall garden. This area is inundated for several days fol...

permaculture designs

Ethangentry1, Reh269, Toriconn, Sarciagam

The BREAD (Broadly Reconfigurable and Expandable Automation Device) Servo Motor Control Slice is a circuit board with an Arduino Nano and fi...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Achannel, Dhhemmings, Rok duncan, Ryankriken

This project examines two hot water heating systems that are commonly used on residential buildings; Solar Thermal Collectors and Air source...

Felicity Tepper

Fruit is often picked before it has fully ripened. This is necessary to allow for transportation, storage, longevity and sometimes even for ...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

We have researched and compared papercrete and straw bale as alternatives to the most common types of building material based on criteria su...

straw bale construction

alternative building

appropriate technology

ecological footprint

Compost can help improve your soil, increase water infiltration, reduce erosion, recycle kitchen and yard waste, and grow healthier plants. ...

50 gallon barrel

25 gallon barrel

This research on small wind energy systems for battery charging is the result of a collaborative effort involving numerous contributors. The...

battery charger

permanent magnet alternator

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Atessa, Evashiu

The Hooch bamboo house is a structure at Rancho Mastatal designed by Joe Scheer. It is made almost entirely of bamboo. The Hooch was constru...

travel internships

bamboo construction

alternative building

Michael Gathogo

A device used to obtain information about a fetus within the uterus

openknowhow.org

Several proprietary industrial symbiosis software tools have been developed, however, without long term financial commitments these endeavor...

industrial ecology

energy efficiency

environmental philosophy

waste management

BREAD (Broadly Reconfigurable and Expandable Automation Device) is a project that has been under development at Michigan Tech for the past y...

We created a large volume open source DIY syringe pump from commonly available and 3D printed parts that allows for high accuracy and repeat...

githubusercontent.com

Take your house. Cut off the water, the electrical power, the natural gas, and the sewage lines. That's what a hexayurt is like without the ...

thermal insulation

Rdd11, Mvecchitto, Lonny

This spring 2011 semester, we constructed a passive thermosyphon solar shower system that utilizes natural temperature stratification to hea...

solar hot water

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

As Alberta increases conventional solar power generation, land-use conflicts with agriculture increase. A solution that enables low-carbon e...

I developed a household size composting system with a rotating 3-lid design, in Humboldt County, California. I wanted a system that would be...

Alger, D. (2009). Grow a greener data center. Indianapolis, IN: Cisco Press. This book talks about how data centers negatively impact the en...

The real goods - solar living center pedal powered generators. In 1995 Jon Schaffer, the president of Real Goods, approached Bart Orlando at...

electricity generation

Pruning hooks are usually used to cut branches down from trees, but in Ghana pruning hooks are used to cut down cocoa pods from tall trees. ...

fruit tree maintenance

Baylee, JULIETTECORTEZ, Chris Bautista, Jennymt941, Lonny, JessElaineRamirez

The purpose of this project was to build a greywater filtration system to reduce fresh water use and inspire other to create reusable water ...

greywater storage and filtration

greywater system

Ken.Dred Spirit, Lonny, G.Aakanksha

The program is a 10-week collaborative internship between Lady Irwin College in Delhi and Cal Poly Humboldt in California. A total of 16 stu...

plastic containers

This project is an attempt to improve upon the bicycle grip found here:Handlebar grips. This design features a substantially better gripping...

The capstone project for Queen's University 4th Year Mechanical Engineering Class,'Engineering for Sustainable Development', is to design an...

food and agriculture

urban agriculture

sustainable farm energy alternatives

built environment

Felicity Tepper

Feet can sweat considerably, especially during warmer months and when enclosed in synthetics or shoes. There are homemade, sustainable solut...

green personal care

Ssscsavn, Arvind R

This project was developed mainly by Walker Nelson Peter Gorecki, who finished their capstone design project through Michigan Technological ...

Heidi05o, Rld277

The purpose of this project is to create an edible railing that will be built on the WetLand barge. The Food on Deck team created a prototyp...

food production

waste stream materials

food and agriculture

The Stretchbarrow is a device designed to carry beach grass. It was created for the Friends of the Dunes organization as a method of hauling...

Merkaba Trueke is a group that gets together to exchange resources, knowledge, and services through barter. Rather than using money, people ...

SunnyBag is a project that aims to deliver mobile solar energy to various low power dc devices like all standard Smartphones, cell phones, m...

portable solar charger

A wall in the main building of Haiti Communitere was being plastered by Sam in the image to the right. Sam's plaster has been used to finish...

travel internships

alternative building

earthen plaster

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Safety Switch Cover for Power Strip. This object was created using FreeCAD for the use of the Principia College Science Department. Its init...

sensitive light switches

Turbines are a much more efficient way to harvest the energy of water in a stream or river than a paddle wheel. A Pelton wheel takes the kin...

Jag61, Megan, Jss36

A natural building project creating a cobb bench from natural materials in Arcata, California, in Humboldt County at Bloomfiled Elementary S...

Full design specs and instructions are here on Google Docs. [please post an image or pdf here, or something - Google Docs is worse than usel...

This OSAT project is the design and prototyping of a hydraulic ram pump. This pump features no motorized parts and can be left unattended fo...

Improving Technics, or 'The Design Imperative' Our quality of life, both collectively and individually, is more dependent on how we use our ...

quality of life

Source Vandewetering, N.; Hayibo, K.S.; Pearce, J.M. Open-Source Design and Economics of Manual Variable-Tilt Angle DIY Wood-Based Solar Ph...

sustainable development

mechanical engineering

mechanical design

balance of systems

renewable energy

When creating projects and robots, no one likes to keep a cable connected at all times. It creates a feeling of something being unfinished, ...

Lineth M., Marvin Meléndez

Un BEE HOTEL es un lugar adecuado para que residan las abejas. No todas las abejas viven en colmenas, además muchas de ellas son solitarias ...

modelo de negocio

The Barcelona Agenda 21 Schools Program (also known as PA21E), is a program that was established for the school systems of Barcelona in orde...

sustainable organizations in chosen country

Tatiana12, Lonny, Hetchyhetchy

Team ATLAS, a group of Spring 2022 Environmental Resources Engineering students at Cal Poly Humboldt, designed and built a photovoltaic syst...

Jessicahorton, JessElaineRamirez, Inesm, Ais111

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

waterproofing material

cabinet handles

Ymile, AndreaGerman

I am very excited to be posting directions for building your very own home vermiculture bin! The methods employed will produce a bin appropr...

J.Arthur, Plaxton.s

Monitoring energy consumption can motivate consumers to save energy by reducing waste. As a Green IT Energy Conservation Measure, the scope ...

energy conservation

energy efficiency

The design of most biogas systems can be traced to either the China Fixed Dome (CFD) with more than 6 million systems in-use (Fig. 1), or th...

renewable energy

Manufacturing in areas of the developing world that lack electricity severely restricts the technical sophistication of what is produced. Mo...

renewable energy

distributed manufacturing

appropriate technology

Building a Chicken Coop to help educate students at Redwood Montessori. Redwood Coast Montessori and the Community Center of Manila have mad...

The goal of this project is to make a funnel that for pouring used resin back into the bottle. There is a space for a filter to be inserted ...

Executive Summary: One Laptop per Child (OLPC) is a non-profit organization that has provided children in some of the most remote areas on e...

solar powered laptop

Malia Seeley, Raulito

These benches were designed for Zane Middle School in order to make the front of the school more welcoming and give students a place to sit ...

Hand washing is an essential part to maintain proper hygiene and to prevent the spread of sickness. In places that do not have access to run...

hand washing station

Polyculture is a type of gardening where various crops are planted interspersed among each other. As opposed to monoculture, polyculture mim...

urban agriculture

organic farming

My project is to design and test a passive solar heating box. The objective of the design is to collect heat and transfer it into a house vi...

The biodiesel refinery at CCAT consists of five stages. The University of Idaho Department of Agriculture in 1991 defined making biodiesel, ...

dry gas methanol

isopropyl alcohol

Haleyisaacson, Erk177, Msd332, Aclemente

instrument storage

Big Bear Heated Driveway is located in the in the mountain community of Fawnskin in the San Bernardino National Forest. A custom home was bu...

heat exchangers

OSP is a low-cost open-source plate reader built out of the [Chow Lab](http://chowlab.seas.upenn.edu/) and the [George H. Stephenson Foundat...

githubusercontent.com

molecular biology

Mcm781, Chriswaterguy

A solar ice maker would be useful for disaster relief, refugee camps, and developing nations, as well as camping and simply reducing energy ...

solar ice maker

Job20, Jps19, Aily, Kat, Emilyread

permeable concrete pathway

sustainable design

Description: Build a flying wind turbine for energy independent adventures. Guide to building a portable flying wind turbine to charge up y...

This solar chimney can be made with low-cost materials and a little labor. It has no moving parts. The sunnier the day, the more effective i...

heating and cooling

This project sought to demonstrate the viability of 3D printed PLA as a mold material for custom ceramics, investigated through an applicati...

Gravity Light Attachment for Crank Flashlight. This is a attachment device that utilizes the American Red Cross Clipray Crank-Powered Flashl...

electric lighting

Mkhultin, Fionaconnor

Hot Water Solar Repair Supervisor: Ben Scurfield This solar hot water system was one of the first in Humboldt County. This system is over 3...

solar hot water heater

renewable energy systems

open looped system

heat exchangers

80 gallon storage tank

50 gallon gas back up

DIN ISO 228 (DIN 259) BSP Standard Pipe Thread 11mm

openknowhow.org

Drb68, Jeffrey novoa

This webpage is about the Redwood Coast Energy Authority (RCEA) Educational Box project. The purpose of this project was to create an educat...

The purpose of this project is to design and build an affordable, efficient thresher for pearl millet. Our summary presentation can be down...

SixRivers ocmmon area

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

yard decomposed granite

This is a plea to all those interested in and working for mosquito control world over. I have doubts on efficacy of source reduction as far ...

mosquito control

The Internet cafe made of a standard 20ft shipping container, normally used to transport refurbished computers. On arrival the container con...

This work offers a primer to the topic of AWVPs, and a description of how to build a dew collection rig. Unfortunately, dewfall is not curre...

rainwater catchment

A heated print bed has multiple advantages. The biggest advantage of a heated print bed is the ability to print higher temperature materials...

3d printer modification

heated print bed

adhesive silicone heater

borosilicate glass

Anthropogenic global climate change has large and mounting negative economic impacts. Companies and nations responsible for greenhouse gas (...

climate change mitigation

most completed projects and publications

renewable energy

greenhouse gas emissions

The purpose of my project is to determine the cost inputs and energy outputs of small scale ethanol production from local and conventional s...

ethanol production

We were in Engr215 Introduction to Design and were working for Locally Delicious to design a solar oven that children ages 8-12 could build ...

Athenav, Jrsolo13, Ellen, Lonny, AAH431, Mcm781

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

30amp charge controller

connector panel

electrical tape

Lexington333, Ttg37, Kgv40, APenny6, Henry Chinaski, Aen131

This page discusses the Las Malvinas hullkrete project from summer, 2015. This project includes: designing and testing eco blocks in Las Mal...

This OSAT project is a carpenter's hammer. In order to be heavy enough and duable enough to drive nails, a bolt is used for the hammering su...

Handychandra7, Wnelson

This page lists the documentation, progress and results for Open Source User Interface Project of Open Source Hardware Enterprise at Michiga...

free and open source hardware

free and open source software

open source user interface

Melissa, Roger, Kristy87, Akr57, Lonny

This project was replaced by Bayside Park Farm solar hot water.

solar hot water

Burnjessh, BT Church, Lonny

Another CCAT project brought to you by an HSU student. The Campus Center for Appropriate Technology (CCAT) at Cal Poly Humboldt was in the p...

interior design

Source Vandewetering, N.; Hayibo, K.S.; Pearce, J.M. Impacts of Location on Designs and Economics of DIY Low-Cost Fixed-Tilt Open Source Wo...

sustainable development

mechanical engineering

mechanical design

balance of systems

renewable energy

The SECU building is a double-storey experimental prototype to present a provocative and innovative design for housing for emerging settleme...

alternative building

sustainable buildings

APPROPRIATE TECHNOLOGY DAY CENTENNIAL PARK, SYDNEY SUNDAY 4TH MARCH 2007 11AM TO 1AM Appropriate technology is technology that can be made a...

australian events

appropriate technology demonstration events

appropriate technology files

The multi-functional platform is a cost effective piece of machinery directed at third world and developing countries, which uses simple ren...

materials processing

The concept of a photovoltaic solar thermal hybrid (PVT) has been around for over 30 years. However, due to the low efficiencies of the phot...

amorphous silicon

This page describes how to use Franklin on the CNCRouterParts 3-D printer (or any compatible machine) such as CNC Router Parts metal 3D prin...

M.Knudsen, Alishac, Namusser, Rjcooley

Our team is investigating a way to print semiconductor transistors using 3D-printing technology. Specifically using Zinc Antimonide (ZnSb) a...

zinc antimonide

The Hydrautomat is a self-powered water pump that uses both air and water pressure to lift water up a series of open and closed tanks by mea...

water distribution

Chriswaterguy, Dylan Treeman

The PlayPump is intended to give children in South Africa a place to play and simultaneously provides their community with a much needed sus...

Beginning in the Spring semester of 2011, Team SodHoppers joined together to work on a semester long project assigned to them by Lonny Grafm...

solar dehydrating

food dehydrator

conservation techniques

food sustainability

copper sheet metal

styrofoam insulation

solar dehydrating

The Single VIP is a Ventilated, Improved Pit. It is an improvement over the Single Pit because continuous airflow through the ventilation pi...

single pit latrine

Simple restoration of a rusty lump hammer bought in a job lot of old tools. A page showing the process. Angle grinder, 40 grit flapper wh...

Cow dung patties made by village women in South Asia are used as a fuel while cooking when wood is scarce. Cow dung is dried and shaped into...

RepRap 3-D printing has already been shown to be a versatile tool for fabricating novel photovoltaic racking designs, however, they can also...

pv module spacer

Matthew Arnaouti

As a member of Superior Search and Rescue, I find myself using a GPS frequently during training exercises or actual searches. At times, it c...

Katie.harris, Dtp145

The Westside Community Improvement Association is a grass-roots organization in Eureka, California working to revitalize the local urban nei...

shredded cardboard

CCNY is a full participant in The City University of New York (CUNY) Sustainability Initiative, which is part of Mayor Bloomberg's PlaNYC fo...

Allows other gases to be mixed into a nebuliser supply

openknowhow.org

For wearing around wrist for injury rehabilitation process in health posts

openknowhow.org

This is a medical device used to maintain or open a patient's airway.

openknowhow.org

Pratiksha, Fionaconnor

Construction of a laser trip-wire to shut off a Delta printer in the event of a detached hotend nozzle or rod

3d printer modification

detached hotend

laser trip-wire

Just as the power of the open-source design paradigm has driven down the cost of software to the point that it is accessible to most people,...

open source optics

open source hardware

optics equipment

open source library

'[Intended to] optimize the amount of material diverted from landfill to beneficial uses through Community ownership of our resource streams...

The electronics and software detailed here measures quantities related to DC electrical energy production from micro-renewables. Including: ...

micro controller

voltage and current measurement

Arshiyaw, Lonny, ARUSHI SRIVASTAVA, KimberlyDB, Haley herren, Himanibharta

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

community engagement

water quality test

Abstract The abstract is a succinct, one paragraph, summary of this writeup (from background to results and conclusions). Background This ...

Over one billion people have little to no access to clean water. There is a need for disinfected water suitable for drinking, especially in ...

This page is for Alex Weitman's Final Open Source Appropriate Technology (OSAT) Project. Her page can be found here: Alex.weitman This OSAT...

osat 3d-printable designs

This is a project designed and built by a student in ENGR 305 at Cal Poly Humboldt. The student, Devan Hemmings, with the help of his father...

Avoiding climate destabilization caused by greenhouse gas (GHG) emissions, requires climate-neutral electricity sources. It has been propose...

most completed projects and publications

carbon capture and storage

classroom storage

The folks at Green Trust power their facility with a combination of wind and photovoltaic (solar panels). Their photovoltaic system consists...

OpenDrop is a modular, open source digital microfludics platform for research purposes. The device uses recent electro-wetting technology to...

digital microfluidics

open science hardware

printed circuit board

In today's day and age, both hobbyist and survival horticultural practices are been becoming more of a nor within our culture. As the amount...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

electricity generation

renewable energy demonstration

Mcm781, Mkhultin

Hot Water Solar Repair Supervisor: Ben Scurfield This solar hot water system was one of the first in Humboldt County. This system is over 30...

heat exchangers

open looped system

renewable energy systems

solar hot water heater

50 gallon gas back up

80 gallon storage tank

Lightweight combination wrenches are simple enough to guarantee a usable print with at least one end of the wrench. The OpenSCAD script can ...

In order to meet global energy demands with clean renewable energy such as with solar photovoltaic (PV) systems, large surface areas are nee...

joint production

most completed projects and publications

This is for my GrowBot project for senior design (Both project pages can be found above in related pages). The length is customizable and a ...

wire sensor holder

This intervention consisted in the recovery of a landfill on the side of a mountain in Colonia Fátima, a small neighborhood in the suburban ...

community design

landfill recovery

Hilary aho, Kpwaugh, Mrdolby

General Facts about Gallium Arsenide Gallium = rarer than gold Arsenic = poisonous 5 cents per gram, $45,000 per ton. Product highly effici...

industrial ecology

gallium arsenide

energy efficiency

environmental philosophy

waste management

3D printed push button switch used to control computers and tablets via screen scanning software.

assistive technology

Felicity Tepper

The Sustainable Development Goals (SDGs) refers to the successor goal set following the Millennium Development Goals (MDGs). The goals were ...

environmental governance

international environmental law

environmental law

sustainable development

Fa39, Elijahfm, Ari9

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

A Trombe wall is a sun-facing wall used in passive solar design. Patented in 1881 by its inventor, Edward Morse, and popularized in 1964 by ...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

This is a device that clips into the heater vents for anyone who owns a car. For an example, this hanger can be used to dry out gloves or si...

A detailed greywater system at Centro Orgánico Finca Sarita, an Ecuadorian seed saving center. This greywater treatment system was built in ...

constructed wetlands

When spreading grout for tiling in areas like the kitchen or bathroom a normal tool may prove to be to large and unwieldy. My landlord asked...

Solar charged flashlights use solar energy to recharge the battery for flash lighting.

solar flashlight

Used to lock the bar of the Injury shoulder recovery Tools

openknowhow.org

Because of the success of the Marshall Plan after World War II in rebuilding Europe, it was believed that the World Bank, the United Nations...

Open-source technology not only has facilitated the expansion of the greater research community, but by lowering costs it has encouraged inn...

open source hardware

Law124, Konanesta, Tardigrade

Locally Delicious is an organization based in Humboldt County, California that promotes sustainable lifestyles. In the past, this organizati...

A review of current and prospective methods for efficient large-scale production of carbon nanotubes Since carbon nanotubesW were first obse...

materials processing

Mitchell DeNooyer

A bike is a very useful mode of transportation that many people in first-world countries take for granted. There has been a goal set to crea...

Source B.T. Wittbrodt & J.M. Pearce. 3-D printing solar photovoltaic racking in developing world. Energy for Sustainable Development 36, pp...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

A simple, ultra low cost, do it yourself type of corrective eyeglasses, made from an aluminum soda can and capable of simultaneously correct...

diy pinhole glasses

vision impairment

The amount of plastic waste being accumulated on a daily basis is higher than ever, which raises the problem of plastic collection, transpor...

Keavy, Marcelamata01, DiegoPortillo, Angelaruiz32

Se trata de la creación de muebles para un segmento de personas de escasos recursos. Además, los espacios donde serán utilizados son bastant...

fabricación digtial

The objective of Team Checkout Us was to build a desk for the SCRAP Humboldt nonprofit to compliment their new location on H and G Streets i...

upcycling gallery

Mag827, Elizabethjurkoic

We, Bryna Frace, Marco Gonzalez, Elizabeth Jurkoic, Delfina Navarro, from Cal Poly Humboldt Engineering 215 have worked with Zane Middle Sch...

animals visiting classroom

livestock education

John H, Sublimedthorin, Bart2, Lonny

In 1978 a group of students collaborated to create the 'Campus Center for Appropriate Technologies' (CCAT) at Cal Poly Humboldt. (HSU) in Ar...

saline water filter

Rmm686, Ksanguinetti, Kellyrandazzo, Nacampos

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Nate gates, Joshua Rodriguez, BethEschenbach

The Energy Monitoring station at Cal Poly Humboldt (HSU) in California , started in December 2008 where one of the many projects under the H...

energy monitoring

We’re building an equipment called an actimeter. At the simplest, the actimeter is used to measure and record the locomotor activity - how f...

githubusercontent.com

As the open source development of additive manufacturing has led to low-cost desktop three-dimensional (3-D) printing, a number of scientist...

nutating mixer; shaker; stirrer

scientific hardware

open source hardware

chemical mixing

open source hardware

heat exchangers

This is the Operation and Maintenance (O&M) manual for CCAT greenshed solar lighting. Please refer to it and keep it up to date with any O&M...

ccat active project

The release of the open source 3-D printer known as the RepRap (a self-Replicating Rapid prototyper) resulted in the potential for distribut...

sustainable development

high-efficiency

NJJaeger, Kmfogg

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Bucket-Shower for Developing Countries/Places with no Running Water Countries that are not as developed as the United States and others have...

Animals raised on a farm or harvested from the field need to be field dressed and skinned in order to obtain quality, unspoiled meat. This p...

DCalderon, SuAmado, Meiraheta

El food dehydrator es una herramienta para conservar y almacenar alimentos usando medios sostenibles como la energía solar a diferencia de u...

modelo de negocio

This tool is used to hold the negative probe when reading voltages on motor control boards for the Athena2 3D printer. It could be modified ...

circuit measurements

negative probe holder

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. This open s...

open source optics

Bart Orlando demonstrates how exercise can be converted into constructive work using a pedal-powered drillpress which he designed and built ...

food preparation

Harshwcam3, Uzairjamil, Prannay Malu

This literature review is for a project which involves using the same piece of land for setting up a PV farm and performing agriculture/live...

most literature reviews

The Elephant Foot in Haiti Communitere is a demonstration piece for a style of building that utilizes concrete, tires, and rebar to make ear...

travel internships

alternative building

upcycling gallery

Littleredshrub, Gem30, Bhopkins

As part of the Spring 2013 semester ENGR 305 Class at Cal Poly Humboldt Holly Johnston and Garrett McElroy were assigned to refurbish a bicy...

electricity generation

ccat active project

Ando, VDeich, Antheamueller

This project aims at exciting children for engineering whilst putting a special focus on female participants. To this day females make up a ...

Asgari, N.; McDonald, M.T.; Pearce, J.M. Energy Modeling and Techno-Economic Feasibility Analysis of Greenhouses for Tomato Cultivation Util...

pearce publications

energy conversion

energy conservation

energy efficiency

Multiple (please see Manual)

Soap used to incentivize hand washing, featuring a plastic toy on the inside

openknowhow.org

Alexe31, Sarajune, Lonny, HappinessOnEarth

Leighblackall, JoshuaDM, Beaumdavidson, CWG

Building a rocket stove mass heater (including research).

permaculture techniques

APSC100: Project #153: Design for Health in Peru Preliminary work on the design of a Health Care Centre in Peru found that one of the primar...

health infrastructure

water purification

Jessica lotak, Jessica Lotak, Lonny

This photovoltaic project was designed to provide electricity to light a home at a natural building institute in Central Argentina. There wi...

electrical tape

photovoltaic panels

The purpose of this Solar Panel project is to show how to construct a solar panel by yourself at home, that produces enough power to charge ...

personal device charger

Navied, Nate Preston

The Queen's Solar Design Team, in collaboration with the Queens Applied Sustainability Group hopes to modify a typical consumer power meter ...

consumer power meter

voltage regulator

The Willow basket parabolic solar cooker was created by Elizabeth Titus, Elle Parks, Simon Walter-Hansen and Bart Orlando for the Lost Valle...

parabolic solar cookers

Lonny, Julia21, Elizabeth.G, Jakereeser, Vindez77

The Triangle of Life project's objective is to create a solution to an area on Zane Middle School's campus (Eureka, Ca) referred to as the T...

Executive Summary: The non-profit organization OLPC (One Laptop Per Child) is looking for a cheap and effective way to power their laptops. ...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Zsarnold, Ajvincen

The objective of the Growbot is to create an open-source autonomous robot that will aid in the farming process and provide a platform that c...

Our project consisted of creating a new rainwater catchment system located at the pharmacy in Las Malvinas. Our group made the appropriate c...

rainwater catchment

According to Construction in Africa, investors are looking to invest $100 billion dollars in the infrastructure of Africa per year starting ...

concrete trowel

For IV bags to be hung

openknowhow.org

Eric420, Kerwin.Math, Hiphipharesh, Lg137

In the summer of 2012, Cal Poly Humboldt students returned to the Dominican Republic to improve the system to simplify the process of removi...

safety redesign

To assist in bathing and toileting. Foldable rail is to be used if space is limited

openknowhow.org

The following is a list of goals, test procedures, survey questions, equipment needed, and abstracts for testing water quality, surveying wa...

project testing

Unicycle, Malia G, Cep42

The Replenish Life Team, Malia Sierra Breeze Gonzales and Neftali Eunice Romero, have created a rainwater catchment system that is intended ...

rainwater catchment

spiral collector

first flush diverter

micron filtration

Winessa, Kpeakes

For this project, Appropriate Technology students, Katelyn Peakes and Winessa Nartia-Stockart, created a cold box for the Campus Center for ...

This page details the process of making a receptacle out of sustainable materials for use on a college campus. Materials and processes inclu...

earthen construction

Michael Gathogo

For medical wards to receive soiled dressings and other medical waste

openknowhow.org

Braydenleach, Lynnphebe125, JessElaineRamirez, Mmw2

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

solar food dehydrator

AlirezaLorestani

Creating 3D objects, using a camera and two line lasers.

This is a shovel handle to either replace broken ones, or add one in where the shovel/hoe/whatever tool has only the wooden handle. Grips su...

El diseño de la mayoría de los sistemas de biogás se remonta a China Fixed Dome (CFD) con más de 6 millones de sistemas en uso (Fig. 1) o In...

renewable energy

Small walls made of loose stones wrapped in fencing or some other strong permeable material and built between a water source and a water inl...

microfilter dams

rock filter dams

The word cob comes from an Old English root meaning 'a lump or rounded mass'. Cob is an ancient building material that is composed of sand, ...

soil high in clay

ccat active project

Appendix Appendix A: Assembly BOM Appendix B: Assembly Procedure This assembly procedure describes the required steps to completely assembl...

The pedal powered TV/VCR was designed and built by Bart Orlando for display at CCAT's pedal powered lab in 1998. The components include a Sc...

electricity generation

Adridelgado, MJ97, FranHdez, Adriana

La toalla sanitaria de fibra de plátano es un proyecto sostenible que tiene como objetivo ayudarle a mujeres y niñas de escasos recursos al ...

modelo de negocio

Roughly a third of the surgical procedures the World Bank is prioritizing as essential and cost-effective are orthopedic procedures. Yet in ...

distributed manufacturing

additive manufacturing

medical devices

medical technology

Izterico, Anniefergie, Shaneb, Lonny, Rayrivera, Evolution number 9

The objective of the project is to design, build and implement multiple versions of the windbelt generator for Otros Mundos. Our initial goa...

renewable energy

Warum sollte die Bildung für die Milliarden von verarmten Schülern und Studenten weltweit verbessert werden? Weil der Fortschritt für diese ...

electric lighting

The final project of Kasper Dienel in the course ELEC-L3999: 3D Printing of Open Source Hardware for Science at Aalto University. 26.10.2017...

Download ECM now! Vending machines are an everpresent novelty in many establishments and a simple example of how energy saving techniques ca...

energy conservation measures

energy efficiency

vending machine

Every time I ride my bike I find myself wishing for a mirror, and the 3d models I've found require you to shove it into the hole of your han...

StoriesWitha Will

I started with a number of guidelines in terms of what to consider and came up with probably a similar list to what I imagine many of you ar...

The usefulness of cleaning refrigerator coils is debated at Should I clean my refrigerator coils. Please read that before proceeding.

energy efficiency

electric appliances

Tom van der Vaart

Replacement screw coolant cap for a truck (44.5mm ID)

openknowhow.org

Toilet seats and hinges are an overlooked item in the modern world. A proper seat and hinge provides support for when nature calls. This ite...

osat 3d-printable designs

The pedal powered/hybrid solar electric lenticular airship. By Bart Orlando, (in memory of Lawn Chair Larry) This is a diagram of a human po...

electricity generation

In this page, an open-source LIBS-core scanner is described. LIBS (Laser-Induced Breakdown Spectroscopy) is a form of atomic emission spectr...

laser-induced breakdown spectroscopy

Plantar Fasciitis is a common foot disorder which can cause severe, sharp pains in the heel due to inflammation of the plantar fascia, tissu...

medical devices

Used to make the paper of ECG device fit inside the ECG

openknowhow.org

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

improved cook stoves

international development

5 gal larger gravel

standard red bricks

yellow fire bricks

sakrete types s masonry mortar

h.c. mortar clay

hardibacker fireboard

metal chimney tubes

Krystal, Mike Saunders

Energy Conservation Method Spreadsheet. Our ECM file can be downloaded here:File:ECM server virtualization.xls .

3d printer modification

filament spooler

Littleredshrub, Elisabeth.dejong, Johnnylococo

This project was part of the Summer 2013 Practivistas Dominicana project, led by Lonny Grafman in the Dominican Republic. Five students, thr...

green construction

plastic bottles

The Redwood Coast Energy Authority retrofit analysis project is a class project to determine the effectiveness of RCEA energy retrofits at a...

According to United Nations Environment Programme (UNEP), the volume of freshwater resources is about 2.5 per cent of the total volume of wa...

watershed magement

groundwater recharge

groundwater recharge

A primary purpose of many dams, both large and small, is to facilitate water diversions. Although existing water supplies can be stretched m...

water conservation

resource conservation

water diversion

Attaches sensors to patient’s ankle/wrist to give visual trace of the heart

openknowhow.org

Djwilliamster, Ledesmaandie, Djnoel97

This OSAT project was created to assist the senior capstone project for the Open Source Hardware Enterprise, OSHE Growbot. The parts designe...

The BREAD (Broadly Reconfigurable and Expandable Automation Device) Text To Speech Slice will be a circuit board with an Arduino Nano and a ...

Abolfazl Taherzadeh Fini

The world is facing a climate emergency. We must reduce our reliance on fossil fuels and their export and, instead, develop renewable and ef...

energy conservation

renewable energy

national security

greenhouse gas emissions

carbon reduction

decarbonization

Erika, Sebasvr8, Valeria Quemain

Este proyecto consiste en realizar un mueble multifuncional que sea práctico para familias que residen en viviendas mínimas patrocinadas por...

fabricación digitial

Ubuntu Blox are a building technology that was developed by Harvey Lacey. Ubuntu Blox projects have been implemented in Haiti to build struc...

earthen plaster

alternative building

travel internships

upcycling gallery

3d printer modification

silicone hot end

The most abundant e-waste plastic is acrylonitrile butadiene styrene (ABS), which is not typically processed by municipal programs and is eq...

distributed manufacturing

additive manufacturing

The CubeFactory 2 is an autonomous and portable mini factory with own energy and material supply. It embeds three modules: a 3D-printer, a p...

githubusercontent.com

circular economy

filament recycling

3d-printer; making

sustainable manufacturing

open source hardware

I originally made a compound parabolic solar cooker by making a mold from cob and then folding and cutting the dish directly over it. I thou...

parabolic reflector

parabolic solar cookers

outdoors cooking

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Msmall29, Skc224

The Water Meter is a water quality meter designed by the Cal Poly Humboldt Engineering 215 - Intro to Design class and implemented on the We...

water monitoring

monitoring and evaluation

Bjholtz, Fionaconnor

Clamps are an essential tool in building just about anything from scratch. This OSAT is intended to take the place of woodworking clamps. Th...

woodworking clamps

Before introducing the project I have chosen to put my efforts towards, I first need to introduce a larger project that will take my smaller...

Andre Maia Chagas

"Flypi" is a 3D printable all in one biology lab that can be used for state of the art experiments in neurosciences as well as for human int...

githubusercontent.com

behavioural tracking

The purpose of this project was to come up with an attractive, sustainable, and space efficient clothes drying system for HSU's CCAT. With t...

bamboo construction

alternative building

construction and materials

built environment

Tom van der Vaart

Plastic clamps to safely clamp wires to car battery terminals

openknowhow.org

Mmm124, Fireweedpink, Embaggett8

This cob oven was built in Spring of 2011 at the up and coming Manila Eco Hostel just west of Arcata, CA. The Humboldt Bay Center for Sustai...

This is an open hardware project on Broadly Expandable and Reconfigurable Data Acquisition and Automation Device (BREAD) Add an abstract (a ...

Tardigrade, Law124, Mrm56

Instructions for Locally Delicious rowing machine blender for schools

David.Bloch, Joshua Rodriguez, Vasquezanim8

Titanium Sun shield is a primer and topcoat application over the polypropylene exterior of a WorldShelters temporary structure. The plastic ...

Matthew K. Makarewicz

A potato ricer is used as a way to mash potatoes. It is a preferred methods of mashing potatoes. This tool can allow people to improve their...

osat 3d-printable designs

food processing

food harvesting

Tre18, Dustin.Poppendieck, JuliaA

This page contains an analysis of the Redwood Coast Energy Authority's (RCEA) lighting retrofit of the Vellutini Baking Company (Figure 1). ...

This new type of adjustable stand has a rope for keeping a parallelogram construction in a stable position. Also the new stand has a counter...

The application of smartphone technology to economic and environmental analysis of building energy conservation strategies

energy conservation

energy efficiency

The treadle pump is a lift pump designed to irrigate small plots of land. Treadle pumps are designed to be operated by the farmer or hand in...

open source scientific hardware

This article is designed for use for the Team X Water Meter used on the WetLand Barge.

monitoring and evaluation

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. See: Zhang ...

open source optics

open source hardware

The project is a part of the bike, offered by Dr. John Gershenson. It is designed based on a real drive-side model since I only find drive-s...

Jamesvontersch, Lonny, Jrivas15, JBHawk

Winner of the June 2005 'Most Energy Efficient Stove' by the Paraffin Safety Association, South Africa (PASASA) among the comparative testin...

energy efficient cooking

carbon footprint

indoor air pollution

energy efficiency

ecological footprint

Jtm43, Bruce.decker, Nam78

This page is about the Hyper Visible Power Meter. It was constructed for the Flock House Project in New York City by Team Stark Industries d...

educational signage

Microfinance project. Microcredit banking offers business training, peer support, and small loans (even only a few dollars) to the world's p...

Partially prototyped -- needs full test with photovoltaics.. The main goal of this Mech425 project is to design a simple, cost effective ind...

bottle cap lighting

A device used to obtain information about a fetus within the uterus

openknowhow.org

Harry Jones, Mario k, Amanda madden, Lav163, Lvh33

Cal Poly Humboldt's Campus Center for Appropriate Technology (CCAT) is looking to further increase the sustainability of its practices. CCAT...

sustainable farm energy alternatives

ccat active project

The Full Belly Project is a non profit organization working to provide simple technologies to improve life in impoverished areas in West Afr...

low cost nut sheller

Wind turbines provide a way to produce electricity through a clean renewable resource of moving air. It is clean in that there is no direct ...

wind turbine display

renewable energy

Locally Delicious

This is the How-To guide for Locally Delicious. Please contact us the authors/editors of Locally Delicious: Recipes and Resources for Eating...

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. See: Zhang ...

open source optics

open source hardware

This technology is an OSAT appropriate technology as it will provide a medical tool for others to use that may not have this technology avai...

Dkucera, AAH431

Bayside Park Farms in Arcata is a community supported agriculture (CSA) that provides positive benefits for its members and for the communit...

This is the Operation and Maintenance (O&M) page for CCAT PV system. Please refer to it and keep it up to date with any O&M changes.

ccat active project

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

The pandemic Ventilator, designed by Michigan Technological Universitie's Innovative Global Solutions Enterprise, was made to assist those i...

An Herbal Tincture is a solution of a medicinal substance, like a plant or herb in an alcoholic menstruum. It is also a method of using herb...

herbal tincture

To increase awareness of pressure retarded osmosis (PRO) as a potential source of renewable energy, an interactive device that demonstrates ...

pressure retarded osmosis

Kenya Ceramic Jinko, an improved cooking stove for Africa.

improved cook stoves

Grishma, Jj555, Apb38

The goal of the operation and maintenance plan for this system in 2019 is to ensure the system fulfills its role in CCAT. The plan is based ...

Tool Background: When considering something useful for the developing world, an easy to use, cost effective, and helpful tool. Anyone with a...

Stujones26, Eh78

By: Stuart Jones & Erin Haugen This page describes natural insulation from recycled paper (Cellulose) to wool and cotton batts among other ...

thermal insulation

energy efficiency

natural insulation

Caleb Wegener, Kaaaren, JessElaineRamirez, Andishi, Ais111

A rainwater catchment system was designed and constructed at The Sanctuary in Arcata, CA. This project was completed for Cal Poly Humboldt c...

rainwater catchment

corrugated drain pipe

Monochromators are used in optics to isolate certain wavelengths from a light source made up of many wavelengths. Monochromators on the mark...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

With the recent completion of CCAT's Raised Garden Beds, CCAT thought it would be an excellent idea to plant companion plants within the bed...

companion planting

Canadienito, Aaron, Tybie, Climbingsurfer, Lonny, Mcm781

A passive solar heating system was designed, built and installed on the roof of Hotel Perote in Parras de la Fuente to heat the hotel's pool...

We built an open source Incubator for biology lab in Cameroon; since most of them are under-equipped due to the high cost of lab equipment. ...

githubusercontent.com

Craigc, Mrf25, Lonny

The M2-B2 Rocket Stove promotes sustainability through demonstration and education while on the WaterPod in New York City. The stove is desi...

sustainable cooking

Boiling is a common way of disinfecting water for drinking around the world. The length of boiling time changes not just based on elevation ...

project testing

Provides a safe area for a baby to sleep

openknowhow.org

GeoBard, Mcm781

California Valley Solar Ranch consists of the following proposal: 250 megawatt (MW) photovoltaic solar power plant on land zoned Agricultur...

renewable energy

endangered species

environmental impact

Photovoltaic solar cell systems represent one of the most promising means of maintaining our energy intensive standards of living. open acce...

A hardware implementation of the Izhikevich model of a spiking neuron. Understanding of how neurons encode and compute information is fundam...

githubusercontent.com

Ransom.Rebecca, Dustin.Poppendieck

Food For People is designated as Humboldt County California's food bank. Food For People operates 13 food distribution programs throughout H...

Clheitin, Kmikeda, Pdtroppe

Bowhunting is a tradition that many Americans take part in every year. There are many types of bows used for hunting such as the crossbow, l...

The instability phenomena can be observed in a practical way by using the 3D printed kit that contains all the necessary tools and connectio...

Estar400, Lucille.larson, Lonny, Hopesakho

The Mahana PV Window Fan is a solar ventilation system intended to provide air conditioning to those without reliable access to electricity ...

See also EWB Australia's events page for the current calendar.

australian events

appropriate technology demonstration events

Demotech (anna)

Inexpensive Display System . Non-governmental organizations (NGOs) can create an inexpensive, attractive display of objects and text using m...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Nicolas Winkler

medical devices

umbilical cord clamp

The tire benches at Haiti Communitere exemplify a way to turn waste material into something useful. A community in Haiti came to Haiti Commu...

travel internships

alternative building

upcycling gallery

This design was created in response to a design request submitted by Field Ready, a non-profit 501c3, that seeks to make field ready humanit...

Kinzer, AngelaMC

An ongoing project designed and implemented at Universidad Tecnológica de Coahuila in Parras de la Fuente, Coahuila México to provide safe d...

solar distillation

stainless steel

Slope erosion causes sediment transport in water runoffs that is drained to waterbodies through rainwater sewer. High sediment levels impair...

Nossa equipe de projeto, 'Fujis and Fugees', é composta por quatro estudantes de engenharia da Cal Poly Humboldt. Para nossa aula de Engenha...

In many developing countries, there is an increasing need for affordable water gathering systems. The main system currently used in several ...

Adam2290, Torincleats, BethEschenbach, Parafox

The purpose of this page is to describe the solar hot water system used by the Campus Center for Appropriate Technology (CCAT) on the campus...

ccat active project

solar hot water

Chetjamgo, Jamieester

The Rock Root J.A.S. (Figure 1) design project was constructed for the World Shelters Foundation from the Spring 2010 'Intro to Design' clas...

corrugated plastic

concrete rubble

alternative building

built environment

This is a twisted tent stake designed for use in more challenging soil types. Because of its twisted design it is a little harder to install...

Lukehalo, Bcreager, Bmg282

This page focuses on the Pump'n Power, which is an alternative power generation device designed and created for the Flock House for their 20...

electricity generation

renewable energy demonstration

Low-Tech, High-Thinking

The BioSand Filter (BSF) is a simple and affordable low-tech water filtration device designed for household use in developing countries. Usi...

biological process

David.Bloch, Shaffer08, Dustin.Poppendieck

Wildberries Marketplace is a grocery store in Arcata, California, and has been operational for over fifteen years. In early 2008, the store ...

The Waste Stream Education Wheel was designed in the Cal Poly Humboldt Engineering 215 class to be an educational tool for use by SCRAP Humb...

Demotech (anna)

Technik für Demokratie. Democamp Einheiten sollen ein Werkzeug für soziale Bewegungen sein. Die, die keine oder nur ein leise Stimme haben, ...

technology camp

The technology of the Air Decohesion Processor (ADP) is based on cold plasma, high alternating fields and are applied to decontaminate air f...

Access to safe water is an issue for 884 million people worldwide, and a part of this problem stems from inability to pump water from wells ...

appropriate technology

water distribution

Saradtorres, Sara y Leticia

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

estufas ahorradoras

Informal refugee assistance program, Madura. Refugee community solution for polluted water Experience of Chris Watkins (Chriswaterguy) liasi...

Jprather, Dmartin

The purpose of this project was to create a portable, collapsible, disc golf station primarily from materials diverted from the waste stream...

gym class activities

physical education

skateboard decks

Melanie, Aleiha

Jose Leandro Hernandez, a local grocer in Parras, Coahuila MX, is interested in harnessing the ample year-round sunshine that Parras receive...

feasibility study

photovoltaic system

charge controller

Srd68, Lonny, Sophia.bee

The Taa-'at-dvn Chee-ne' Tetlh-tvm' Food Forest in Crescent City at College of the Redwoods Del Norte serves to increase healthy food acess,...

sustainable farm energy alternatives

Las biojardineras son consideradas filtros vivos para el tratamiento de aguas grises de las familias de la comunidad de Santa Marta. Estas c...

acción climática

Can we trust in technology to provide us with abundant energy with no environmental impact?

energy efficiency

renewable energy

I created a pill holder to hold daily pills for up to 14 days that a professor at Penn State University requested. This is my final project....

TobyH, Kyle Morgan

Insulation made from recycled newsprint became commercially available during the 1940s when the paper industry was seeking alternative uses ...

energy efficiency

thermal insulation

building elements

This is a start of a page on open source smart thermostats. This is the start - https://opensource.com/article/21/3/thermostat-raspberry-pi ...

table saw push stick

The earthship living space was built at Haiti Communitere as a response to the 2010 earthquake. It serves as a demonstration for how homes c...

travel internships

alternative building

food production

water conservation

urban agriculture

The ACROS Fukuoka building in Fukuoka City in Japan is an amazing office building with two very distinct sides: one side looks like a conven...

sustainable commercial buildings

sustainable cities

Apereira94, Gerardorivass

AcquaTank es un proyecto que promueve el ahorro de agua y energía en nuestro entorno. Este consiste en aprovechar el agua de lluvia mediante...

Trinity Milian, Emilyread

The purpose of this project was to redesign the triangular area in front of Catherine Zane Middle School, Eureka CA. A new, even path made o...

To assist in bathing and toileting

openknowhow.org

Nanosphere lithography (NSL) provides an opportunity for a low-cost and scalable method to optically engineer solar photovoltaic (PV) cells....

plasmonic enhancement

silicon solar photovoltaic cells

hexagonal silver arrays

nanosphere lithography

materials processing

A cold closet is an easy to build, energy efficient storage for fruits and vegetables. The cold closet will keep the food products cool but ...

thermal insulation

energy efficiency

The Grameen phone is an opportunity for developing countries to communicate via Global System for Mobile communications (GSM). The phones ar...

appropriate technology

information technology

Crs23, Ijk4, Dustin.Poppendieck

In June 2008 the Redwood Coast Energy Authority (RCEA) completed a lighting retrofit for Leon's Car Care Center to increase energy efficienc...

Why Use Thermal Curtains? In most homes, windows are the single largest avenues of heat loss. Glass is a very poor insulator, having an R-va...

thermal curtain

thermal insulation

energy efficiency

heating and cooling

The combination of open-source software and hardware provide technically feasible methods to create low-cost, highly-customized scientific r...

open source design

open source hardware

scientific equipment

EHandy, JustinRomani, Lonny, Sol Jané

The Emergency Photovoltaic Box, created for Appropedia, provides an affordable source of clean power during shelter-in-place emergencies whe...

energy generation

Felicity Tepper

Dirty windows make it hard to appreciate the wonderful world outside. Fortunately, there are various ways to make your own window cleaner to...

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

flowering currant

The household products we use on a daily basis often contain harmful chemicals and carcinogens. However, strong chemicals are unnecessary wh...

non toxic cleaners

ccat active project

ApproPeters, Senaca, Dfh95

The purpose of building a solar dehydrator is to provide the Arcata Educational Farm with a reliable hybrid dehydrator. Its goal is to help ...

food dehydrator

propagation trays

double frame window

Gustavo Morales503, CarolinaSndvl, Eilleen

El Salvador tiene el 90% de sus ríos contaminados debido al poco margen legal (FONAES, 2021). Por eso, muchas familias no tienen acceso al a...

modelo de negocio

This guide was written as we made this transition to use GIS in estimating solar photovoltaic yield over large areas. Full text of study ava...

JessieHSU, TakumiFujiwara, Afm237

The CCAT solar stereo system was designed and constructed by four students from Cal Poly Humboldt during the Spring 2021 semester for class ...

THIS METHOD IS CURRENTLY A WORK IN PROGRESS Here is outlined the method to shred, clean and dry PET at the MOST lab at Michigan Technologica...

pet preparation

Team Cubic, under the Redwood Coast Energy Authority, set out to design a curriculum to educate 3rd and 4th grade students about the science...

Emilyread, Val.tin, Nickbrandi12, Buddy Mitchell

The Campus Center for Appropriate Technology (CCAT) at Cal Poly Humboldt in Arcata, California has an outdoor area that has potential to be ...

green construction

Jamesfitzgerald

Ashleyragus, Mfriedmann

Potato insulation is an essential component of home construction. Insulation helps decrease the flow of heat, and is a sound absorber. Cotto...

building elements

thermal insulation

energy efficiency

In many countries, disposing of PET bottles has caused a major problem. Recycling these bottles proves a difficult challenge. This Bottle St...

bottle stripper

plastic recycling

Folding Chair Commode with Parametric 3D-Printed Bucket Holder. The combination of disability and poverty creates a sanitation nightmare. Ov...

For handling sterile bandages/foreign object removal at health posts

openknowhow.org

So510, Chelseainez, Jec582, Joshua Hostler

physics demonstration

industrial blower

Welcome! This website is designed to provide the viewer with information about CCAT's volunteer built strawbale shed. In hopes of using this...

There is an intense need to optimize agrivoltaic systems. This article describes the invention of a new testing system: the parametric open ...

additive manufacturing; agriculture; agrivoltaic; distributed manufacturing; farming; gardening; open hardware; photovoltaic; recycling; solar energy

distributed manufacturing

MeghanHeintz, Lonny

The WaterPod is New York based art project/exhibition of sustainable living and conservation. The project entails a barge showcasing a varie...

sustainable living

renewable energy

electrical and motor encasement

pvc pipe and fittings

Goniometers are simple devices used to measure the angular range of motion of human limbs. It is common for doctors to monitor the muscular ...

medical devices

This project is an attempt to create a simple bicycle brake for the open source community. This brake relies on minimal hardware and uses sc...

Katherine Flores, Greensea, Benjamin, Angie Montenegro

Nuestro proyecto, Bowi, se enfoca en la elaboración de bowls de snacks saludables, los cuales contienen fruta deshidratada, yogurt y granola...

modelo de negocio

Sarah mizu, Abigail, Climbingsurfer

Rainwater catchment is a method of capturing and storing rainwater in a tank for later use. This catchment system is designed and constructe...

rainwater catchment

Detailed Design and Analysis Combining the initial design selection and the requirements described previously, the team has determined the ...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

When rented rooms or houses lack electrical power facilities, i.e. wiring, switches, and power outlets, or where existing electrical facilit...

fluorescent tube lamp

electric lightning

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Three types of highly-customizable open source probe positioning systems are evaluated: (a) mostly 3-D printed, (b) partially printed using ...

open source hardware

optoelectronics

fosh; open hardware

micromanipulation

open source scientific equipment

probe positioner

Bocas del Toro, Panama is a popular tourist destination. It is an archipelago located in the Caribbean Sea off the coast of northeastern Pan...

height measurement

child development

This functional and aesthetically appealing bamboo planter is appropriate for those with ample supplies of large diameter bamboo. The exampl...

large diameter bamboo

bamboo construction

alternative building

construction and materials

built environment

Bourgeois, Kyle basnett

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

rainwater catchment

GregPfotenhauer, Q.agrifolia, Luis Gonzalez, Yumi Terayama, Adabie2, Lonny

Students from both Cal Poly Humboldt and UNIBE, Colectivo RevARK, and the neighborhood of La Yuca completed this project for the Escuela Bas...

alternative building

The Hexayurt is a refugee shelter system based on work done at the Rocky Mountain Institute. It uses an approach based on 'autonomous buildi...

emergency management

emergency shelter

appropriate technology

the open toolbox

To overcome the challenge of upcycling plastic waste into 3D printing filament in the distributed recycling and additive manufacturing syste...

advanced materials and processing

control and automation

process engineering

production systems optimization

sustainable manufacturing

additive manufacturing

open-source hardware

computer vision

quality assurance

real-time monitoring

plastic bottles

This micro water turbine can be paired with a DC generator for power generation applications. The micro design allows for the turbine to be ...

electric lighting

DIN ISO 228 (DIN 259) BSP Standard Pipe Thread 16mm

openknowhow.org

At Cal Poly Humboldt the course Engr 215 allows one the real life experience through service learning. During the Fall semester of 2009, our...

soil high in clay

Dloates, L.Gardner

Couriers contribute greatly to global greenhouse gas emissions; in 2008 UPS emitted 13.2 million metric tons of CO2. Emissions are the resul...

energy conservation measures

energy efficiency

This project will investigate the effects on yearly performance of a planer concentrator on array-scale solar photovoltaic (PV) installation...

low concentration planer concentrators

medical devices

umbilical cord clamp

Tool libraries, which have been around since at least the 1970s, offer communities a way to share resources that would otherwise spend the v...

community. sharing

The Haiti Communitere computer lab offers a wide variety of resources.

travel internships

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Ayonshahed, 5sg12

By upgrading lighting components to more efficient and advanced technologies, lighting retrofits can greatly reduce energy consumption and l...

energy consumption

On site Photovoltaic & Solar Heating system on Golf Course Rd, Bayside Presented by Ben Scurfield This site displayed a grid-tied photovolta...

solar hot water

This is the latest draft text of the 'Copenhagen Accord' put forward on December 18 by the U.S., China, India and South Africa, among other ...

emission reductions

Dieser Artikel beschreibt den Prototypen eines Kompostheizungssilos. Hierbei handelt es sich um das Herzstück einer hausinternen Kompostheiz...

waste management

renewable energy

Demotech (anna), Vacuum1313

This is about the construction of Bathroom Toilet units affordably. It aims at improving sanitation in rural settings. This method is meant ...

composting toilets

composting toilets

James Apple, Nathan.Chase, Natesanger

Alternative energy technologies such as photovoltaic modules (Figure 1) are becoming more popular around the world. In 2008, for the first t...

'Open-source' plans for biodiesel homebrewing equipment, using off-the-shelf parts and a water heater: An old water heater tank can be adapt...

water heating tank

This OSAT project was a request and I was unable to find any attempts of a rotary edger in the current database. This model requires additio...

This prototype of smart motorized blinds was created by the Queen's Solar Design Team to put into a demonstration solar home. The prototype ...

energy conservation

motorized blinds

automatic blinds

temperature sensor

microcontroller

darlington array

temperature sensor

energy efficiency

The objective of this project is to design an interactive display with the purpose of promoting energy conservation within the region. The d...

energy conservation

energy efficiency

Alvaroc, Mkoval6, JessElaineRamirez, Andishi

Cal Poly Humboldt's Engineering 215 Introduction to Design, introduces the Toilet to Sink Greywater System created by Team Greenlight at the...

greywater system

sanctuary arcata

The Drop Spindle is an ancient tool used for spinning fibers such as wool, cotton, flax, and hemp into yarn, without the need for a large, e...

recycled materials

upcycling gallery

Mi versión de un inodoro de aserrín (como se describe en el Manual de humabono) consta de un cubo receptáculo, un asiento de inodoro extraíb...

To create an open source pellet extruder for an open source desktop 3D Printer.

3d printer modification

The snowmobile pull starter handle is appropriate for OSAT due to some peoples ability to access various snowmobile parts around the world. ...

snowmobile parts

This toilet paper holder is an appropriate technology because it allows people in developing countries to store and use their toilet paper c...

toilet paper holder

Lonny, ZaneCook, Phil Tran

Cassiopeia is a portable and durable computer capable of operating completely off solar power and without access to the Internet. The design...

The goal of this project is to increase the lighting intensity of a single light bulb by adding a reflective shield to the bulb that would d...

electric lightning

lightning intensity

Shariif Butaan is an enterprising man. As a diesel mechanic, rebuilt engines were his stock in trade. He patched together Russian truck engi...

economic growth

success stories

renewable energy

The Greenovation Fund provides a financial leg-up to students in the California State University system interested in developing sustainable...

Holds a standard scalpel bladed

openknowhow.org

incorrectly designed so that primitive components are not held together correctly mechanical stability questionable design to be 3d printabl...

An invention as seen by Cedric Kalonji, a Congolese journalist in Kinshasa (D.R.C.). For the lack of a cheap power supply in the City of Kin...

In December of 2011 Ecofficiency built an aquaponics system in Haiti Communitere. The system is comprised of three plant beds and three fish...

travel internships

sustainable agriculture

food production

water conservation

urban agriculture

food and agriculture

I decided to construct a bike trailer for personal use. Since I am an Arcata resident, I find to easy and enjoyable to bike everywhere excep...

Script that generates 3D printable braille label based on user-provided text.

assistive technology

The pedal powered tablesaw was built by Bart Orlando in 1998 at CCAT, for use in the pedal powered workshop. A Rockwell Delta tablesaw was m...

food preparation

Rainwater storage tanks are more important in semi arid areas than any other areas because they are useful in storing limited water supplies...

underground water storage considerations

rainwater catchment

Tre18, RCEA JTRM, Matthew Rooney

The lesson plan, The Power of Wind, provides the means of educating fourth-grade students on the topic of renewable wind energy. Enrolled in...

laminating sheets

voltage ohm meter

This page describes the development progress and the history of the Campus Center for Appropriate Technology's (CCAT's) Mobile Energy Operat...

A RecycleBot is a waste plastic extruder that creates 3-D printer filament from waste plastic and natural polymers.

waste plastic extruder

plastic extruding

natural polymers

polymer recycling

Caceresfr19, FranciscoMurillo, Danieljd, Valeriasantos

Este proyecto trata sobre el diseño de un sofá-cama covertible, en el cual el soporte del sofá está hecho de juncos y por debajo de este, se...

fabricación digtial

This is a Hand Powered Washing Machine. The purpose of this project is to make it easier to wash clothing. Washing clothes by hand can be st...

Dlm58, Lonny, Loags07, Tmj9, Carlos Sanchez

This Improved Fuel Stove, or Rocket Stove, is the final project for Engr305 at Cal Poly Humboldt. The project goal is to construct a demonst...

insulated ceramic bricks

Mkh62, Pauljohnston1992

Locally Delicious is an organization working to re-localize Northern California, and the Six Rivers Region's food system. Their work is not ...

Sure, you can harness energy and cruise around town on a bicycle, but have you ever wondered what else that energy could feed? A human on a ...

energy generation

An effective method for the diagnosis of severe acute malnutrition is the measurement of the middle upper arm circumference (MUAC). Current ...

medical devices

A delta-bot stage based on the OpenFlexure design

translation stage

Tom van der Vaart

Using Make-Fit app a range of 3DP pipe fitting can be produced

openknowhow.org

The paper describes an open source computer vision-based hardware structure and software algorithm, which analyzes layer-wise the 3-D printi...

additive manufacturing

open-source hardware

computer vision

quality assurance

real-time monitoring

These mills have been developed by the TDRI, Tropical Development Research Institute, England. These two devices (see image 23) are both ver...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Felicity Tepper

Steaming is one way of cooking vegetables and is a healthy way of preparing vegetables as it retains a high level of the original nutrients ...

Jlg120, Lorraine

Through Engineering 215 Intro to Design at Cal Poly Humboldt, taught by instructor Lonny Grafman, Team Skin for the Win worked on a design p...

upcycling gallery

Heat up 3/4 Cup of Oil of Your Choice in the microwave with 2 teaspoons of Steric Acid and 1 teaspoon of Emulsifying Wax until melted. In a ...

herbal remedies

emulsifying wax

Rain catchment systems can be constructed in many areas, both to increase the regeneration of the local aquifer with rainwater and to reduce...

Recently, I was involved in a discussion of designs for a simple solar cooker. The obvious one has a symmetrical paraboloidal reflecting dis...

parabolic solar cookers

physics of sound

nodes of displacement

pyramind pa amplifier

function generator

Technical progress in the open-source self replicating rapid prototyper (RepRap) community has enabled a distributed form of additive manufa...

open source optics

open source hardware

metal 3d printer

metal 3d printer

DylanJBardin, Jpa28

A hangout/reading area is a place where people go to have fun and relax during the stresses of their everyday life. Our client representativ...

The Haiti earthquake of 2010 was a terrible tragedy, but offers lessons for those needing to understand crises and emergency management: Ev...

emergency management

The equations on this project need to be checked.. The original rope pump is a relatively inexpensive solution for pumping water out of rela...

depth adjustable

AutoInjectors are a spring-loaded device that aides in delivering the proper dosages of certain medicines. The have built-in adjusters to en...

medicine delivery

Harvesting solar energy using photovoltaic (PV) cells is the simplest, efficient, and reliable approach to power marine electronics. Install...

floating photovoltaic

sustainable development

underwater photovoltaics

light harvesting

dye-sensitized solar cell

solar cell characteristics

We have been intrigued with a unique style of composting toilet which is in use by some members of the natural building community. It combin...

composting toilets

Amp123, Bryan Schmitt, BethEschenbach

Cal Poly Humboldt is changing the lighting system around the Redwood Bowl sports field in order to reduce emissions, light pollution, and en...

lighting system

Forest.andresen

A better way to eat. Everyone eats, some eat with their hands, and some eat with utensils. This is a project focusing around bringing the be...

Ana Elisa Mejia Boo

Es un proyecto en el cual se quieren realizar aproximadamente 100 casas, para mujeres con hijos y que viven en una exagerada pobreza. Este p...

green construction

plastic bottles

botellas de cristal

botellas plasticas

This is a payload attachment for the DJI Phantom 3 quadcopter. Unlike other payload attachments, this does not require the removal of the ca...

dji phantom 3 quadcopter

payload attachment

search and rescue

A project aiming to give citizens a way to participate in the conversation about air quality. It is composed of a sensing device that measur...

This piece is a connector for air tubes developed to fix a nebulizer problem

openknowhow.org

Bed preparation is the number one important thing you can do for you plants. Double-digging is a method of bed preparation that aerates soil...

bed preparation

The purpose of this project was to design and construct a rainwater harvesting system for Redwood Coast Montessori school in an effort to in...

renewable water

rainwater catchment

mosquito-proof mesh

Peanutman654, Mjc647

The CCAT greenhouse is a prefabricated model from Sturdi-Built which is a greenhouse manufacturer based in Portland, Oregon. The CCAT greenh...

ccat active project

sustainable farm energy alternatives

The hand wood planer is designed for making medium to detailed design cuts on wood. Typically, these cuts are low stress on the handle, so p...

Ais111, Ballin Colin, KingPig42, Aida

Otto DIY Workshop

Otto is truly Opensource robot for education; it means the hardware is easily discerned so that others can make it, is also Arduino compatib...

githubusercontent.com

MarisaChristine89

Sustainable Tea Agriculture Project is a project sponsored by Lipton to work to get the tea farms in Turkey sustainably certified by the Rai...

This fills the need for a cheap aid that can help people with nerve damage. I have not found any case studies specific to this need. I am ha...

Melissaflores0, Gerardo Nuila, Elisa Huezo

modelo de negocio

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Cht67, Nal263, Jdr439

Recommendations for Improving Operation and Maintenance of CCAT Appropriate Technology Systems 5/7/2010 Recommendations for Immediate Action...

ccat maintenance

ccat active project

Download ECM now! This ECM can be used to determine the financial and energy savings derived from replacing a computer's old power supply wi...

energy conservation measures

energy efficiency

Customizable Bike Handlebar Plug designed using OpenSCAD.

4 x 2 ft greenhouse structure using recycled 500 mL bottles that I collected from a local recycling center.

plastic bottles

The Xela Project, started by The Appropriate Infrastructure Development Group began manufacturing water filters after helping communities in...

The first project within MY4777 was to design and print a rockwall hold. The STL file was created in openSCAD and printed using the MOST 3D ...

In some places in the world, people struggle to meet their daily recommended dose of iron. In mild cases, iron deficiencies cause a variety ...

diet supplements

Building a Traverse Climbing Wall to help educate students at Redwood Montessori. The purpose of this project is to replace the current play...

diy climbing wall

This chapter reviews the recent promising advances in the use of plasmonic nanostructures forming metamaterials to improve absorption of lig...

renewable energy

solar technology

plasmonic light trapping

Source Hayibo, K.S., Pearce, J.M., 2022. Optimal inverter and wire selection for solar photovoltaic fencing applications. Renewable Energy ...

sustainable development

mechanical engineering

mechanical design

balance of systems

renewable energy

Sliver plating standard operation procedure<ref>Schlesinger, Mordechay, and Milan Paunovic, eds. Modern Electroplating. 5th ed. The Electroc...

This page is a survey of all the commercially available water quality testing equipment. Please add to the table if you are aware of tools t...

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

KyletheHusky, Nitopoop, Marianac

Our team's objective was to create the most appealing workbench possible with limited funds. The desk is currently being used to create art ...

community art spaces

upcycling gallery

3D printers have come a long way. This project hopes to push the field of 3D printing into even greater endeavors. This printer moves away f...

To aid in safe and easy transfers between wheelchair and latrine

openknowhow.org

Drawing Exchange (DXF)

Storage unit is attached to the underside so items are easy accessable

openknowhow.org

The showers at Rancho Mastatal were made using natural building techniques including lime plaster, tadelakt plaster, clay paint, and mortise...

travel internships

earthen construction

earthen plaster

alternative building

Siliézar, AdriCarrillo

Innovación comunitaria encontrada en la comunidad Río Mar, Puerto de la Libertad, La Libertad, como solución creativa al guardado y almacena...

In many areas of the developing world the conditions under which wheelchairs are used are significantly rough and damaging to the equipment....

mobility and rehabilitation

appropriate technology

Neil Cudney, Chris.Arcani, Mde120

probability demonstration

First, use your sponge until you feel that it is time to get a new sponge. Second, Dont buy a new sponge, boil your old one! Third, fill a p...

This project is part of a collection on open source optics meant to radically reduce the cost of experimental optical equipment. See: Zhang ...

open source optics

open source hardware

Felicity Tepper

While fruit yield is dependent on the type of fruit being grown and the particular variety, there are a number of generic ways in which you ...

urban agriculture

organic fertiliser

A RepRap 3D printer hanging from the ceiling. The RepRap project first showed the world cheap small scale 3D printing in 2006. Their design ...

cable driven robots

parallel robots

open source design

hobbed drive gear

nema17 stepper motor

DjEcoResto, Lonny

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Aelesage, Lmjewett, Adreinl, Samiftah

The purpose of this page is to outline the process of 3D-printing organic semiconductors to prototype a photovoltaic sticker that can be adh...

organic stickers

photovoltaic stickers

Motivation for this project is that outside industruial semiconductor production the processed wafer quantities are small. In academia it is...

chemistry equipment

J.M.Pearce, Mcm781

This is a series of five fully annotated Power Point presentations created for the solar energy community to assist in the dissemination of ...

educational resources

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

The gravity-fed irrigation project is a local project being worked upon by young refugees to support nutrition, especially for the needy. Th...

water harvesting

[[[File:Hipconstruct.jpg|thumb]]

Of course you can do a lot of different things with a smooth formed Plastic Bottle, I made a separate article on the subject.

This is part of a masters project: Solar Energy System Design for the Electrification of the Bennett Freeze Area.

Chelcowie, APSC100TA

The purpose of this project is to create a thermostatic valve that can be used in a solar water pasteurization unit. Water pasteurization is...

thermostatic valve

water pasteurization

solar water pasteurization

water purification

Brake Calipers are an important component required to build a bicycle. In order to build a cheaper, open source, bicycle, the calipers can b...

Pierce Mayville

This is a scrub brush for cleaning what ever it is that needs a little elbow grease. It costs a fraction of commercially available scrub bru...

There are many ways to convert and use energy. Energy stems from two basic forms; Potential energy, energy that is not yet active and Kineti...

energy generation

Unser Designteam, 'Fujis and Fugees', besteht aus vier Ingenieurstudenten der Cal Poly Humboldt. Für unseren Engineering 215 -Kurs im Frühja...

The Practivistas Domincana Program is currently a program involving Cal Poly Humboldt and UNIBE that takes place in Santo Domingo, Domincan ...

rain water catchment

rainwater catchment

This is the Operation and Maintenance (O&M) manual for CCAT rocket stove. Please refer to it and keep it up to date with any O&M changes.

Demotech (anna), Ackp17

Technology should be an instrument for social movements. It should not only serve to maintain current political power structures, but also a...

technology camp

The 3-D Printed Hand Pump is an OSAT that allows liquid to be pumped from a reservoir to a container. Hand pumps are needed in across the gl...

liquid transport

Fixedfixed, Cdm50

Showers account for 18 percent of residential indoor water use. When you consider that the United States uses nearly 1.2 trillion gallons of...

This is a cross-flow turbine, basically a water wheel turned by stream to produce energy. This provides energy without the cost of fossil fu...

cross flow turbine

A Urine Diverting Dry Toilet (UDDT) is a toilet that operates without water and has a divider so that the user, with little effort can diver...

Sarahcooper, Wponting

The scope of this project was to investigate past work on the CCAT earthbag garden terrace at CCAT, identify the best cobb recipe for a proj...

green construction

construction and materials

ccat active project

Izterico, Tressie

Esta página esta diseña con el proposósito de inspirar a la gente que hable español a diseñar su propio generador de viento sin turbina. Ens...

renewable energy

'Clinical trial' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'St...

Used to create a seal around the pipes that enter inside the chamber

openknowhow.org

Il nostro team di progettazione, 'Fujis e Fugees', è composto da quattro studenti di ingegneria di Cal Poly Humboldt. Per la nostra classe d...

Jane’s Walk is a series of neighbourhood walking tours. Named after urban activist and writer Jane Jacobs, Jane's Walks are held annually du...

Tightens interlocking threaded collars onto a a water input hose for a compressor

openknowhow.org

Although international law forbids nuclear attacks, only nine states have mutually assured destruction available to prevent direct attacks a...

nuclear weapons

nuclear winter. nuclear proliferation

national survival

nuclear safety. global catastrophic risk

existential risk

intellectual property

In order to alleviate production costs and increase the environmental performance of solar photovoltaic (PV) manufacturing, an eco-industria...

industrial ecology

eco-industrial park

embodied energy

industrial symbiosis

Indian and Chinese made cruisers, known as Black Mambas in East Africa, are the most common type of bicycle found throughout sub-Saharan Afr...

osat 3d-printable designs

This is an investigation of the capacity and capabilities of the module r.sun, one of the utilities of the Geographical Resources Analysis S...

open source software

qas completed projects and publications

This project aims to fill the need for a small item that can be placed in a car, which serves the purpose of clearing snow and large ice fro...

osat 3d-printable designs

PV-Trigeneration Optimization Model (PVTOM) was developed to simulate and optimize hybrid photovoltaic and trigeneration energy systems base...

energy production

heating and cooling

La mia versione di un gabinetto con segatura (come descritto nel manuale Humanure) consiste in un secchio contenitore, un sedile del gabinet...

Dandabear, Fionaconnor

outdoor classroom

teaching station

portable whiteboard and podium

repurposed materials

Sparasar, Ben.mitchell, Jcmaggio

The potential of successful PV mesh networks is based on five variables: system design and sizing, solar energy availability, economic analy...

Jordan Null, Fionaconnor

Kidney Tray. In an effort to help health posts in Dolakha district in Nepal, Field Ready has requested some medical tools that can be 3D pri...

organ transplant

printable supplies

category:osat 3d-printable designs

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

rainwater catchment

rainwater filtration

100 micron sediment filter

20\ cellulose filter

Bryce, Henry Chinaski

The CCAT Bike Blender 2015 was constructed as a class project by students of Cal Poly Humboldt's Engineering 305: Appropriate Technology cla...

food preparation

One of the UN’s 17 sustainable development goals is to end hunger, achieve food security and improved nutrition by 2030. This goal will be m...

sustainable food production

human nutrition

Additive manufacturing with 3-D printers may be a key technology enabler for entrepreneurs seeking to use disruptive innovations such as bus...

entrepreneurship

disruptive innovation

distributed manufacturing

One of the most important farm tools is the hoe. It has the ability to cultivate and aerate soil. This tool can also dig out weeds in farms....

Microscope incubation box for home built single molecule microscope

githubusercontent.com

single molecule imaging

I noticed that some company as Freeplay Energy Ltd make wind-up electricity generators for humanitarian purposes. One suggestion here is tha...

For the Spring 2021 class project of the Engineering 535, Development Technology class at Cal Poly Humboldt, we were tasked with designing, ...

air purification

indoor air pollution

four sided diy air filter

low cost air filter

spring semester 2021

wildfire smog miitigation

merv 13 air filter

For their ENVS 353 Alternative Energy Systems' course, Sierra Nevada College students Tiago Galletti, Andrew Jordan, Parker Martin, and Zach...

The Ontario feed-in tariff (FIT) for solar photovoltaic (PV) technology has provided Ontario's Aboriginal communities with an opportunity to...

aboriginal communities

Du Zhaoxu, Subratkam

In some scenario of human underwater activity, it is too dangerous for crew members to manipulate the underwater vehicle. At this circumstan...

fuzzy logic control system

underwater unmanned vehicle

O projeto da maioria dos sistemas de biogás pode ser rastreado para o China Fixed Dome (CFD) com mais de 6 milhões de sistemas em uso (Fig. ...

renewable energy

Drewstoked, Jrb120

Team Universal Research and Design's goal was to design a solar oven that kids, ages 8-12, could build with the help of an adult. We were co...

Fernando Alberto, Beefish, Lonny

This page outlines the Arroyo Norte waste plastic innovation from start to finish over the six week project that is all part of the Practivi...

electrical tape

electrical wire

upcycling gallery

'Implemented' is not in the list (Idea, Designed, Modelled, Prototyped, Verified, Deployed, Commercialized) of allowed values for the 'Statu...

Farmbot is an open source CNC farming machine that enables automation of the agricultural tasks including sowing, watering, weeding, and mon...

KaitlynBurghardt

This research and design paper was completed by Kaitlyn Burghardt as a component of the 3rd year chemical engineering class Energy & Environ...