> The layout is done now and a diode will be fitted. > I'll hammer the prototype and see if I can kill it! :-) Ha ha OK, and try and dumb yourself down to the most-careless user level. Which isn't always easy. Oh, someone would never do *that* would they ? Like my neighbour who was messing about with solar panels. He once spent a summer working at Dick Smith's, so he totally knows what he's doing (!!!) "You might want to put some diodes in there, I'll go and get you a few", I said, offering. "Nah, I'll be careful, anyway it's got fuses" *** So, he hooks up something backwards. How many fuses blew ? How many wires burned ? Who's portable stereo could now get a part in a famous Monty Python sketch ? (beautiful bird, the Norwegian Blue) ========= Friend of my nephew grabbed the wrong plug-pack for a Cry- baby wah pedal. +ve tip instead of -ve. A 2c diode would have prevented a $300 effects pedal being trashed. Still can't believe they left one out at that price. User error, but foreseeable ========== *** A boss of mine tried to install his own car stereo. 1A fuse kept popping. Logical next step ? Bigger fuse of course. He got to a 40A headlight fuse before the dash wiring caught fire -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist