At 00.48 2011.11.09, you wrote: >> Build a noise probe, using a relay wired as a buzzer and a series LC >> across the contacts, with the L being a small (pencil-eraser sized) >> coil. Use this to probe for weak points and evaluate. Change design >> as needed. Thanks, but I'm not sure I understand the implementation, nor if this noise probe should detect EMI or should be connected to various points in the circuit. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .