On 5/26/06, Tom Sefranek wrote: > Think current source/sink with a good voltage compliance range, > then line length is a non-issue. right...as a non engineer, I don't fully understand this. Can you perhaps give me a couple more terms to make my Googling a bit more helpful? And does this go against what the others have suggested, or is there a difference between a current source/sink and a constant current source. Thanks! Josh -- A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist