At 11:36 AM 12/1/97 -0800, you wrote: Check out http://www.microchip.com/10/Appnote/AppNotes.htm and look for PICREF-4 (PICDIM Lamp Dimmer for the PIC12C508) MD >>>> Hi-- Does anyone have a circuit and some code for driving a 60 Hz, mains-line synced PWM? I need to create an AC dimmer for 120V incandescent lights that will operate under PIC control. I know it's been done, but I have yet to see a lucid explanation of how the routine works... Thanks-- I thought I'd see if anyone can help so I don't spend development time re-inventing the wheel! --Alan McFarland Alan McFarland's Applied Magic Custom Electronics for the Motion Picture Industry Lighting and Electronics for Models, Miniatures, Props & Sets http://www.appliedmagic.com <<<< -- Martin Darwin a.k.a Rambo [CtF] martin@davin.ottawa.on.ca 3rd year Computer Engineering http://www.davin.ottawa.on.ca/~martin University of Ottawa Quake Clan Ctf - http://ctf.clanworld.com - IRC #capture