Hi, I've been lurking around this list for a while now and its turned out to be an invaluable source of information. I feel the time has come to ask my first question though. I have no EE background so apologies for any incorrect terminology I may use. My project involves using a PIC to read pulses from a high voltage source, a car's injector pulse signal. I'm not happy at all with the way I'm currently reducing the pulses to 5V, using a zener diode and a potential divider. I know there must be a much better way to do this and would be eternally grateful if someone could offer me a better solution, it would be fantastic if I could come up with something capable of handling a wide range of voltages for the pulse. e.g.. 2V to 60V. Keep it simple though or I'll never understand! Many thanks, Graham -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads