DO NOT use red/orange/green colors of one LED to send your user data. I'm working with a Newport motion controller and the only user feedback it offers is via RS-232 or one single LED which varies between red, orange, and green. Or, as I see it, on, on, and on. I know we've discussed this before but it bears repeating. Mike H. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist