I didn't think about using a "standard" PID library but there's one for the Arduino at http://www.arduino.cc/playground/Code/PIDLibrary
There's an active thread for the library at http://www.arduino.cc/cgi-bin/...pl?num=1226431507/90
I finally tested my smoker this past weekend and it rocked. I used Bob's original design with some tweaks to control a home-made drum smoker. The ribs were among the best I've ever had. Pics:
Controller: http://www.flickr.com/photos/7...t-72157624474579682/
First test run...
The idea of cutting up a junction box to use as the enclosure is brilliant. The only think I might change is the use of flexible conduit to make it easier to move around.
My turn to thank all of you for the idea of making my own controller and I'm currently fumbling through my own implementation. My addition to the build is a pot connected to one of the analog input pins for setting the thermostat.
I have some questions for you: how many of you had to fiddle...