Hi Dave, have you been able to set up the PIC and get any program to run on it yet ? A blinky LED for example What you want to do is fairly simple but I think you need the confidence of a basic accomplishment before tackling the more complicated logic of timers, interrupts and captures -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist