A simple servo attached to a light switch and an Arduino. Paired with a trio of sensors to demonstrate possible applications. (a button, proximity sensor, and photo resistor)
For details on how to make your own:
http://www.instructables.com/id/ESE4SD5FPWWR86J
Or for more fun open source projects:
http://www.oomlout.com
cool
factorization1 1 year ago