1sclunn wrote: > What chip would you recomend someone use if they were charging lead > acid bats.
There are lots of them for small batteries. When the battery is small and cheap, and doesn't last long anyway, you can use a chip that is small and cheap; it won't cost you much when it kills the battery prematurely. But I don't know of any that are well suited to large batteries, where a mistake kills a thousand dollars worth of batteries. I've used the TI/Unitrode UC3906 and UC3909, but both had problems from being overly simplistic. By the time you add all the circuitry for current sensing, error detection, fault protection, timers to avoid mode hopping, adjustments for battery type and age, etc. the circuit is so complicated that you might as well have used a microcontroller. -- Lee A. Hart Ring the bells that still can ring 814 8th Ave. N. Forget your perfect offering Sartell, MN 56377 USA There is a crack in everything leeahart_at_earthlink.net That's how the light gets in - Leonard Cohen
