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Engr305 Appropriate Technology Projects: Below are selected service learning projects from Engr305 Appropriate Technology, which is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman.

Air Ship Air City rooftop greywater filtration A rooftop greywater filtration system   Aleiha's parabolic solar cooker Parabolic Solar Cooker   Amal's ethanol still A valved reflux ethanol still   Backyard Biodigester A biodigester converting organic waste to a fuel source   Bike Rodeo bicycle blender A kid's bike blender for Rio Dell Community Resource Center   Bike trailer A bike trailer from a converted baby stroller   Blue ox earthen oven Blue Ox earthen oven   Bottoms strawbale earthen plaster Earthen plaster and natural paint recipes