> Would it be worthwhile to provide a voltage divider in the feedback loop > around IC2A, to allow Vdd to be driven 5% or 10% *above* the nominal value > during program verification? High-end device programmers do this, but maybe > it isn't necessary here. Good point. It should be able to go to the highest allowable supply voltage for any of the supported PICs. I think that is 5.5V. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu