David VanHorn wrote: >> And why 1N4148s are dying, 1N4007 not? > > Interesting question. Obviously the 4007 can handle more energy, but that's > not likely the cause. Could it be that the voltage rises too fast? That it reaches values deadly for the 1N4148 before the diode can open? Gerhard -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist