Engineering 305 (Engr 305), Appropriate Technology, is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman. See past projects below.
Past Projects
<gallery perrow=4>
File:AEFcurrentmarsh.jpg|
Greywater system at the CSA, Arcata Educational Farm
File:DSC 0425.jpg|
A solar dyhedrator to help preserve surplus crops
File:CurrentWall.JPG|
An earthen informational kiosk
File:Winterbreak 040 -800x600-.jpg|
Modified off-grid photovoltaic system
File:Aefswh-finished.jpg|
Improved solar water heating system
File:185.JPG|
Restored the existing herb spiral
File:BarrelPlant5.JPG|
A rooftop greywater filtration system
File:Aleiha dish.jpg|
Parabolic Solar Cooker
File:Ethanol production my pipebomb.jpg|
A valved reflux ethanol still
File:Fullsideview1.jpg|
A bike trailer from a converted baby stroller
File:Picture A.jpg|
The Blue Ox earthen
File:Wall3.jpg|
Earthen Plaster and Natural Paint Recipes
File:Coldbox 1.jpg|
an energy efficient solution to a refrigerator
File:Finishedfrontgo.jpg|
CCAT's comprehensive composting system
File:They are done!.JPG|
Controlled beds of soil above toxic ground
File:Retainwall-all2.jpg|
A retaining wall for slope erosion
File:Cordwood pic..jpg|
The cordwood and mortar wall of CCAT's Greenshed
File:Bottle wall.jpg|
The clay-straw slip wall of CCAT's Greenshed
File:Cobb project20 (Medium).JPG|
Cob wall of CCAT's Greenshed
File:Greenshed west wall.jpg|
The Clay-straw slip wall of CCAT's Greenshed
File:P5090042.jpg|
CCAT's Greywater Marsh 2008
File:Ccat grywtr inprogress.jpg|
The CCAT Greywater Marsh Continued
File:Side Rack1.jpg|
An efficient clothes drying system for CCAT
File:Wtproject.JPG|
A demonstration wind turbine
File:Concretestain bat1.jpg|
A natural concrete stain
File:NP78.jpg|
Interior paints from natural ingredients.
File:Complete Frame.jpg|
An earthen informational kiosk for CCAT
File:DSC00118bc.jpg|
An updated iversion of CCAT pedal powered bicycle
File:Peddle grainmill final set-up 0171.jpg|
A pedal powered grain mill for CCAT
File:IMG 0024.JPG|
CCAT's current rainwater catchment system
File:Slope5.jpg|
A stable slope for planting and attracting beneficial insects
File:Improvedfuel8.jpg|
CCAT's improved fuel rocket stove