Michael Wrock wrote : > I looked at the circuit diagram for the pic programmer, > and I noticed that the pic is wired into a quartz crystal. OK, so the programmer uses the "crystal" oscillator option in the processor. That's just OK. > Is this just part of the programming process, No. > or do I need to include it on my breadboard? Depends on how you program the CONFIG. If you've told the PIC to use a crystal, you need it. If you've told the PIC to use the internal oscillator, you do not need it... Read the data sheet ! > From what I've read > the 16f627 has a crystal like that in it. Where have you read that ? *No* Pic has any crystal built-in. Some (quite many actualy) has an "internal oscillator". Again, read the data sheet. Here's a page with some PIC intro facts : http://www.voti.nl/swp/index.html I have made a PDF version of it that can be found here : http://www.jescab.se/Starting_with_PICs.html Regards, Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist