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

-----Original Message-----
From: pic microcontroller discussion list =
[mailto:PICLIST@MITVMA.MIT.EDU] On
Behalf Of Lee McLaren
Sent: Thursday, April 01, 2004 2:26 AM
To: PICLIST@MITVMA.MIT.EDU
Subject: [PICLIST] [EE]: Reverse phase dimmer circuits


Hi,

I have spend a lot of time on the net trying to find a circuit for a =
reverse
phase or trailing edge light dimmer for 240vac around the 100 watt mark. =
I
would like to make a remote control dimmer using a PIC, I have found =
some
PIC code that I can adapt but I am finding it difficult to find any =
circuits
as a starting point.

I am guessing that the circuit would use a Mosfet or IGBT to do the hard
work.



regards


Lee McLaren

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