mattschinkel wrote: > 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?? This was discussed in the ICSP introduction I pointed you at. Short answer: Programmer and target Vdd must be connected in many cases. ******************************************************************** Embed Inc, Littleton Massachusetts, http://www.embedinc.com/products (978) 742-9014. Gold level PIC consultants since 2000. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist