On Thu, Dec 9, 2010 at 11:44 PM, RussellMc wrote: > As you said you wanted to be able to terminate charge on low battery > you will need a series pass element (transistor usually) so can limit > maximum output voltage extremely easily. An eg CES2310 FET, anyold > [tm] opamp (say LM358 / LM324) a cheap reference diode (TL431) and a > few resistors will allow an acceptable solution. What does low battery protection have to do with maximum output voltage? I'= m not understanding what you're saying. --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .