Scott Dattalo wrote... >On Fri, 4 May 2001, Dave Dilatush wrote: > >> Bob wrote... >> >> >I don't know what your talking about (Willis), about using a light >> >bulb to sense load output (sounds pretty "Rube Goldberg'ish" to me). >> >> "Rube Goldberg'ish"??? Jeepers creepers, Bob, that circuit has only >> THREE flippin' parts in it, and they're all passives!!! What's to not >> understand? >> >> Alright, let's make it simpler: I'm going to knock it down to TWO >> parts for you. Hang on to your hat, and read slowly and carefully. > >A "zero" part solution (the way you're counting parts) would be to glue = the pic >directly to the heat source and configure it to run in "RC" mode. The = internal >RC oscillator has a strong, but repeatable temperature coefficient - you= only >need to calibrate it. > >Not too practical perhaps, but it is fewer parts! Heh. It'll have fewer still, after he powers it up for the first time: the OP said these little heater tips of his get up to 2,000 degrees. Dave -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.