> This is a typical 5V to V+ high side driver. 5V logic "1" at the > base of the NPN turns it on and pulls the base of the PNP > low, ... I know you know better and this is just a typo. But so others don't get confused, your schematic shows the emitter and collector of the PNP transistor flipped backwards. ******************************************************************** Olin Lathrop, embedded systems consultant in Littleton Massachusetts (978) 742-9014, olin@embedinc.com, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu