David VanHorn wrote: > The positive temp > coefficient will tend to help you here, otherwise it would go into > runaway, with the hot diode taking more current till it pops. Which is likely since diode voltage *decreases* with temperature. ****************************************************************** Embed Inc, Littleton Massachusetts, (978) 742-9014. #1 PIC consultant in 2004 program year. http://www.embedinc.com/products -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist