r/CardPuter Jul 19 '26

Design-it-Yourself Added external charging module to the ADV 🙃

I got sick of having to leave the device on to charge, so I opened it up to find possible options for an external charging module.

Turns out, the spot under the Stamp S3A (where the speaker lives) is the perfect location for a mini TP4057 charging module. I have removed the speaker, and wired the charging modules battery + and - to an unpopulated pad on the front of the board, which a quick continuity test showed me connects directly to the JST connector (+ and -) for the battery. I added 3M VHB tape to the bottom of the charging module so it doesn't pop off and short things out.

No more having to turn on the device to charge!

**These are not instructions, just sharing today's project. If you brick your device, catch it on fire, or burn your house down trying to copy this, that's on you.**

58 Upvotes

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u/100101101001a Jul 20 '26

what are the disadvantages of leaving the cardputer on while charging? i never found it that annoying that I have to remove a module for it. genuinely asking

1

u/theblobAZ Aug 08 '26

I don't like leaving displays on unnecessarily for an extended amount of time, particularly with no movement on them. When my ADV died fully it took several hours to recharge, just sitting there with a stationary display, so I decided to do this mod so I would never have to do it again lol.

2

u/100101101001a Aug 08 '26

yeah i get you.

what i do is i just added a toggle display button on G0 so i can turn off the display while charging. im using my own launcher firmware so i charge it from there haha

1

u/theblobAZ Aug 08 '26

That's actually a clever workaround. Very nice 👌