A very simple circuit is something that can be made quickly and without too many components on a piece of board (the one with a lot of holes pre-made in it) dics >> Is it possible to make a very simple circuit to program >> EVERY 16F and 18F pics using ICSP ? JES> No. JES> ( B.t.w, what is "a very simple circuit" ??? ) JES> Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist