[SNIP] It could be, if you were to pump the energy back into the power line, rather than just dumping it as heat. Dave, I wouldn't begin to know how to do that.........not to mention the time it = would take and the cost that might be incurred both in engineering and in t= he final product. But it sounds really cool! I suppose you will now tell me..... * It's really simple * any real/qualified EE should be able to do this * I am morally obligated to do this * ???? :-) BTW, I read Circuit Cellar all the time. Mark --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .