On Mon, 27 May 2002, Bala Chandar wrote: >Peter's idea of firing the triac only during certain half cycles to control >the fan speed sounds interesting. I will try it out one of these days. Actually during certain *full* cycles. The idea is tried but this is the first implementation using a PIC that I know of (mine). Peter -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads