Low Battery Sensing
Dan Michaels email (remove spam text)
>I wanted to sense battery voltage, in a circuit run directly from the
>battery, by ...
>1) use IO pin(s) to run voltage doubler
>2) voltage doubler goes to zener on Vref
>This would let a pic running from (say) a Li-Ion batter (3 to 4.1V useful
>range, I'd guess) sense the battery voltage on an absolute basis, at the
>equivilent of very low dropout voltages...
>Does that sound reasonable?
Hi BillW, forget the voltage doubler, just use a 2.5v ref diode
run straight off the I/O pin.
http://www.piclist.com hint: The PICList is archived three different
ways. See http://www.piclist.com/#archives for details.
See also: www.piclist.com/techref/power/batterys.htm?key=battery
You must be a member of the
piclist mailing list
(not only a www.piclist.com member) to post to the