> > I call it the fool's diode. Is that enough to > > explain its function? > Nope > Me fool ... No smiley, so just in case you are serious: the diode shorts the power supply if I accidentally connect it backwards. I only use power supplies that are current-limited to ~ 1A, don't try this with a PC SPSU unless you are in for pyrotechnics. Wouter van Ooijen -- ------------------------------------------- Van Ooijen Technische Informatica: www.voti.nl consultancy, development, PICmicro products -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics