Below are service learning projects from Engr305 Appropriate Technology, which is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman.
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Greywater system at the CSA, Arcata Educational Farm
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A solar dehydrator to help preserve surplus crops
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An earthen informational kiosk
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Modified off-grid photovoltaic system
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Improved solar water heating system
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Restored the existing herb spiral
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Greywater system at the CSA, Arcata Educational Farm
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A rooftop greywater filtration system
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Parabolic Solar Cooker
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A valved reflux ethanol still
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A bike trailer from a converted baby stroller
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Blue Ox earthen oven
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Earthen plaster and natural paint recipes
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An energy efficient solution to a refrigerator
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CCAT's comprehensive composting system
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Controlled beds of soil above toxic ground
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Retaining wall for slope erosion at CCAT
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Cordwood and mortar wall of CCAT's Greenshed
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Clay-straw slip wall of CCAT's Greenshed
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Cob wall of CCAT's Greenshed
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Clay-straw slip wall of CCAT's Greenshed
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CCAT's Greywater Marsh 2008
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CCAT Greywater Marsh Continued
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Efficient clothes drying system for CCAT
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Demonstration wind turbine
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Natural concrete stain
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Interior paints from natural ingredients
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Earthen informational kiosk for CCAT
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Updated version of CCAT pedal powered bicycle
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Pedal powered grain mill for CCAT
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CCAT's current rainwater catchment system
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A stable slope for planting and attracting beneficial insects
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CCAT's improved fuel rocket stove
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CCAT's vermicomposting bin
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Replacing CCAT's living roof
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A hybrid, solar food dehydrator
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An exploration of compressed earth bricks
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Solar powered vertical vegetable garden
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Experimental Vertical Axis Wind Turbine
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Instructional Solar Learning Station
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Peanut sheller made from clay and newspaper
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Determining the cost inputs and energy outputs of small scale ethanol production
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A straw-bale greenhouse
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A residential greywater processor
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A rainwater catchment system for residential property
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Solar cooker out of local invasive species and waste materials
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A solar cooker and chair when not in use
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A pedal power generator
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An electric lawnmower that utilizes solar power as an energy source
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A passive solar heating box
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Furniture made from cardboard
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An umbrella in the rain, a solar cooker in the Sun
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A garden at Sunny Brae Middle School
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A residential rainwater catchment system
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A valved reflux ethanol still
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A working model of a Pulser pump
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A rainwater catchment system for Old Growth Cellars
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Use of biomass waste charcoal briquettes for rocket stove
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roubleshooting, repairing, testing and maintaining a preexisting off-grid photovoltaic system
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A multi-use solar cooker
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A commercial pastured chicken operation in Arcata, California