Hi. First, do not use upper case only in the subject. Many regards that as "shouting" and you will get fewer replies. Second, I think that a subject that better says what it's all about would have been better. No one is in the position to "require" anything from the list, and doing that will probably just give you fewer replies anyway... With that said, > There are a lot of examples on the > web on using optically coupled triacs. Maybe something like thse modules : http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3865095804 http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3865085593 Much easier to use then discrete components and you get stuff like zero crossing detection builtin. Best Regards, Jan-Erik. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist