On Mon, Jan 13, 2014 at 9:34 AM, Alexandre Guimaraes wrote: > Maybe a zero crossing detector transformer ? Can you trace the PC= B traces ? That's my plan! ....as soon as I have time... Josh --=20 A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .