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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.

AEF food dehydrator

A solar dehydrator to help preserve surplus crops  
AEF greywater

Greywater system at the CSA, Arcata Educational Farm  
AEF informational kiosk

An earthen informational kiosk  
AEF photovoltaic system

Modified off-grid photovoltaic system  
AEF solar water heater

Improved solar water heating system  
AEF spiral herb garden

Restored the existing herb spiral