LiPo battery pack (HP 35 etc.)

[teenix]

(04-27-2018 04:25 PM)mdunn Wrote:  Perhaps of interest...
https://www.edn.com/electronics-blogs/be...ck-to-life

The low battery warning built into the HP-35 might not work any more under this arrangement, but probably of no concern.

A schottky diode in series with the battery would have reduced the voltage slightly at the regulator input and helped protect against reverse voltage which may occur with a home made setup.

cheers

Tony