> btw, if I use 12vac/1A secondary how much current I can draw ? 12V * 1A = 12 watts 12W / 220V = 55mA assuming perfect transformers. Maybe 40-50mA in real life. ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body