Thanks I am away on buisnes now so my copy should be there waiting for me on my return. Tim Ps I do intend to build many. I you so desire an off the shelf charger, 7dayshop.com has them inc 4 AA 2000mah bats for <20 GPB -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Jan-erik Svderholm (QAC) Sent: Friday, May 02, 2003 5:38 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [EE]: NmHi charger chip recommendation required M. Adam Davis wrote: >It may not be worth it to build one yourself. Well, Tim didn't wrote that his plan was to build just *one* charger. He might have plans for a million, who knows... Anyway, earlier this week I got an issue of Dallas/Maxim's "Engineering Journal" that had charging as it's special topic. There are a couple of "In-depth articles" and "Design Showcases" about charging batteries, primarily Li types, but anyway. Such as "Designing a pulse charger for use with unregulated power supplies". Tim, I just picked up my issue from the paper recycling bin, and, if you can't get hold of one, I could send you my copy. Just note that, for *some* reason, they seems to like the the chips from Dallas/Maxim best :-) Jan-Erik Svderholm. -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads