Em 3/1/2012 16:37, KPL escreveu: >> The MOC3041 is a ZC opto-triac, so if you're using an opto >> anyway there's no added complication to the design > Yes, I'm using MOC3062 which kas ZC detecting, but controller has to > know when to instruct a optocoupler to open. Otherwise it will not be > in sync. Am I wrong? If you monitor the zero-crossing, then you don't need a zero-crossing MOC, you could even control the conduction angle to have greater control over the power. Isaac --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .