Mark E. Skeels wrote: > I wrote: > > It could be, if you were to pump the energy back into the power line, > > rather than just dumping it as heat. >=20 > I wouldn't begin to know how to do that.........not to mention the time i= t > would take and the cost that might be incurred both in engineering and in > the final product. >=20 > But it sounds really cool! >=20 > I suppose you will now tell me..... >=20 > * It's really simple > * any real/qualified EE should be able to do this > * I am morally obligated to do this > * ???? >=20 > :-) No, I wouldn't tell you any of those things. ;-) It was just an idea that arose from my work on energy-storage systems and "reversible" power converters. I think it would be an interesting project, but probably not appropriate for a commercial product (at least, not yet). I don't think it would be terribly difficult -- primarily a matter of combining elements from a PFC circuit and a boost converter -- but getting some of the details right regarding feedback and the control loop could be pretty tricky. I'm guessing you already use a switchmode regulator for the charger side ..= .. > BTW, I read Circuit Cellar all the time. Glad to hear it! -- Dave Tweed --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .