Gerhard Fiedler wrote: >> Again, assume that the wire coming in will have occasional short >> spikes of 200V and figure out what that will do. > > When you say "short spikes", do you have an idea what "short" means? > ns, us, ms range? I would want it to survive at 200V for a few 100uS. You can assume the repition of these events are low so that the average power can be ignored, but the instantaneous spike must not damage anything. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com _______________________________________________ http://www.piclist.com View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist