>I'm more interested in the brawn than the brain. How do you >control the temp of an individual radiator? You'd need a way >to bypass it correct? I assumed he was looking to using a PIC to drive a motor to turn the radiator valve on that radiator. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist