> These are bad questions I will try to re-word, but I cannot change the question too much. I can have 2 circuits, one for 5v, one for 3v PICs. I have read microchip's documentation, but they seem to have many schematics. They are of course based on the PIC Kit 2 programmer, but I do not want to base my decision on PIC Kit 2 only However if I create a final product that has a 5v PIC/circuit, and I want others to be able to program this product via ICSP. Is it ok to directly connect this VDD to power supply 5v VDD on all programmers?? Thanks, Matt. -- View this message in context: http://old.nabble.com/ICSP-purpose-of-VDD-pin--tp28024262p28028689.html Sent from the PIC - [PIC] mailing list archive at Nabble.com. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist