On Fri, Jun 17, 2011 at 12:06 PM, RussellMc wrote: > >> Could you draw a simple schematic on how this "clamp" works? I'm not > really > >> understanding it. > > Cct ex TI datasheet > TL431 December 2005. > > R1, R2 set clamp voltage. > 431 turning on turns on transistor and clamps voltage. > > Applying a very fully charged LiIon to this circuit may be exciting. May= be > not. > Resistor in battery lead can be used - maybe 1 ohm, to reduce fun and > games prospects. > > Would something like this work? Using the comparator across each battery? http://solarwind.byethost7.com/pic1.png --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .