Hi James. I don't have an actual example for you, but in "The Robot Builder's Bonanza" by Gord McComb, he had a parallel port buffer for the hobbiest so you wouldn't fry your computer. My copy is unfortunately in another city, so I can't scan it for you. You could try your local library though. Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams "James Newton, webhost" wrote: -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads