This induced a bout of uncontrollable laughter. I guess I see too much of myself in their target victim (even though engineers were not mentioned). =A0 =A0 =A0 =A0 =A0 http://xkcd.com/356/ Work calls ... =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0Russell FWIW: The resistor problem appears hard at first glance but may have a assymptotic solution. FWIW --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .