The guy who wrote the PID library for the Arduino is about to release an open hardware PID controller, if you're interested: http://brettbeauregard.com/blog/201

The guy who wrote the PID library for the Arduino is about to release an open hardware PID controller, if you're interested: http://brettbeauregard.com/blog/2011/09/a-little-teaser/ http://brettbeauregard.com/blog/2011/09/a-little-teaser/ I met him a few weeks ago at a hackerspace in Boston-- the thing looked pretty cool. (On the other hand, maybe buying a controller would take all the fun out of it!)