>Is it a good or bad idea to mount a PIC in the wide open real estate on the >opposite side of a power transformer? I have never tried this, but am >tempted to now.....unless.... I would not want to do it if using the A/D converter, unless some serious precautions were taken in the A/D sampling rate to put a notch at the mains frequency. This will limit the maximum frequency the A/D will be able to sense, probably to a point where you will be able to measure only DC. If you are that tight for room this would probably be the case anyway. I would also agree about the problems with board flexing. If this is a commercial product you are developing there is only one response - don't do it, it will definitely cause reliability problems. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads