> Does anybody know how to program a 16F877 while In-Circuit or know of an > example or Application note. You should first decide if you want to use LVP (low voltage programming). I built a board where a 16F628 programs a 16f876. With LVP I don't have to generate 13v. Jay -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads