Well, this is probabley blindingly obvious to everyone but me, but I guess I'll ask anyway. The resonator is polarized i.e. pin 1 is In and pin 3 is Out. The PIC has Osc In and Out pins. Sooo, does the PIC Out pin connect to the resonator In pin and the resonator Out pin to the PIC In pin? Or is In connected to In and Out to Out? Thanks a lot, Colin _________________________________________________________________________ Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. Share information about yourself, create your own public profile at http://profiles.msn.com. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.