Hurricane II: An HP-41C Battery Pack w/ USB

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Hurricane II: An HP-41C Battery Pack w/ USB

12-12-2020, 08:49 PM (This post was last modified: 12-12-2020 08:52 PM by Hans-Peter.)

Post: #13

Hans-Peter Offline

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Posts: 101
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RE: Hurricane II: An HP-41C Battery Pack w/ USB

My design has no BAT control but a power-off switch in case a hard reset is necessary.

This version has a diode between LiFePo4 battery and the charger module, so I can use a normal 4.2V charger.
The second module is the step up converter to 5V.

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Messages In This Thread

Hurricane II: An HP-41C Battery Pack w/ USB - Hans Brueggemann - 12-11-2020, 06:39 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Massimo Gnerucci - 12-11-2020, 07:16 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Sylvain Cote - 12-11-2020, 07:39 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Massimo Gnerucci - 12-11-2020, 07:42 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - JurgenRo - 12-11-2020, 08:07 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - PeterP - 12-11-2020, 09:00 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - rprosperi - 12-12-2020, 04:08 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Ángel Martin - 12-12-2020, 07:28 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - MeindertKuipers - 12-12-2020, 11:39 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - twoweims - 12-12-2020, 12:55 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - rocket.scientist - 12-12-2020, 01:55 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - BruceH - 12-12-2020, 03:16 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans-Peter - 12-12-2020 08:49 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Mark Power - 12-13-2020, 05:42 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - EricB - 12-13-2020, 09:10 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - HP-Collection - 12-13-2020, 01:38 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans Brueggemann - 12-14-2020, 07:06 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - jch - 12-13-2020, 04:39 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - BobVA - 12-13-2020, 06:11 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans Brueggemann - 12-14-2020, 06:57 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - BobVA - 12-15-2020, 03:40 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Craig Bladow - 12-14-2020, 04:33 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - wbvreeuwijk - 12-14-2020, 11:04 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans-Peter - 12-14-2020, 01:19 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Artur - Brasil - 12-14-2020, 03:22 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - wbvreeuwijk - 03-08-2021, 03:11 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans Brueggemann - 03-08-2021, 06:34 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - wbvreeuwijk - 03-15-2021, 04:23 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans Brueggemann - 03-15-2021, 04:46 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - rocket.scientist - 03-18-2021, 04:31 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Uli - 03-13-2021, 10:33 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - aurelio - 03-13-2021, 12:05 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans Brueggemann - 03-20-2021, 06:48 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - dmh - 06-08-2021, 04:49 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Siegfried - 06-09-2021, 08:47 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - MeindertKuipers - 12-09-2021, 10:01 AM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Hans Brueggemann - 12-09-2021, 09:38 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - MeindertKuipers - 12-10-2021, 12:58 PM

RE: Hurricane II: An HP-41C Battery Pack w/ USB - Amithlon - 12-12-2021, 12:30 AM

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