You can use a variation of this circuit for most AC control
applications.
Use a normal HV bjt or fet, pmw the base at a lot higher frequency than
50/60hz with no zero crossing detection (put a small cap across the
source-drain / Emitter-Collector)

-----Original Message-----
From: pic microcontroller discussion list
[mailto:PICLIST@MITVMA.MIT.EDU] On Behalf Of David Challis
Sent: Thursday, April 01, 2004 8:01 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: Reverse phase dimmer circuits

ST Microelectronics has a good app note on this, AN518.  Here is a link:

http://www.st.com/stonline/books/toc/an/1135.htm

Dave Challis

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads