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HP41 Battery idea Lipo
05-25-2023, 06:34 AM
Post: #10
RE: HP41 Battery idea Lipo
(05-23-2023 05:11 PM)Diego Diaz Wrote:  Working on a solution for the third: the BAT indicator. It requires some sort of "emulation" of the discharge curve of the alkalines, and I think it can be done by tweaking a bit the DC-DC converter with some 'amplified negative feedback loop' (just an idea for now), and yes I know it may sound kinda contradictory since it's a stet-"up" converter... :-D

I think all you need to do is detect low voltage on the lipo, and when you detect it set the DC/DC converter to an output voltage that makes the 41 turn on the low voltage indiction.
So basically just a comparator that detects when the LiPo drops below a threshold and then tweaks the DC/DC converter feedback path.
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Messages In This Thread
HP41 Battery idea Lipo - Freeclimber77 - 05-22-2023, 08:31 PM
RE: HP41 Battery idea Lipo - rprosperi - 05-22-2023, 09:23 PM
RE: HP41 Battery idea Lipo - Freeclimber77 - 05-22-2023, 10:00 PM
RE: HP41 Battery idea Lipo - rprosperi - 05-23-2023, 11:49 AM
RE: HP41 Battery idea Lipo - FLISZT - 05-23-2023, 03:45 AM
RE: HP41 Battery idea Lipo - Diego Diaz - 05-23-2023, 05:11 PM
RE: HP41 Battery idea Lipo - Harald - 05-25-2023 06:34 AM
RE: HP41 Battery idea Lipo - Diego Diaz - 05-25-2023, 12:03 AM



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