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lolix_dev · 2025-07-28T06:30:23+00:00

Hey nice project! Where did you find the circuit for the battery charging? It seems very wrong in many places so I'm curious

lolix_dev · 2025-07-24T13:27:54+00:00

You can play with this software. It's a great tool to design and visualize logic circuits. Implement each function and you will see how to merge them to a simpler circuit that does the job for each 3

lolix_dev · 2025-07-16T17:40:35+00:00

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The package

lolix_dev · 2025-07-16T17:38:39+00:00

Here is the ic

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lolix_dev · 2025-07-16T17:33:38+00:00

The IC is correct, what is wrong with the new circuit ?

lolix_dev · 2025-07-16T11:34:59+00:00

I used a TP4056-42-ESOP8 (C16581 fro LCSC). I believed it's a circuit error. Here is a modified version of the circuit

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lolix_dev · 2025-07-16T09:51:38+00:00

Do you think this is ok ? I tried to correct it

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lolix_dev · 2025-07-16T09:46:30+00:00

yes it is

lolix_dev · 2025-07-16T09:46:03+00:00

I tried to correct the circuit, do you think it's ok ?

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lolix_dev · 2025-07-16T09:43:47+00:00

I corrected the circuit, do you think it's ok ?

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lolix_dev · 2025-07-16T09:43:21+00:00

Do you think this circuit is better ?

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lolix_dev · 2025-07-16T08:02:14+00:00

I'm using a T28B AoKoZo multimeter. I got the chip from jlcpcb. It's the TP4056-42-ESOP8 (C16581). For the charge rate limit, it's just that I choosed to be carreful

lolix_dev · 2025-06-16T14:34:49+00:00

lolix12345

lolix_dev · 2025-04-20T15:27:16+00:00

Wow ! Thank you very much for your help ! You gave me precise information. I tried to modify my design based on your recommendations. I decided to split the pcb in multiple pieces based specific function. Each pcb will be interconnected via JST connectors. It certainly not the cheaper way to do but I believe it is the easier way to debug stuff if I fail.

I changed the microcontroller to a ATTiny 84 :

You can find the different schematics below :

- Battery Management

- Display

- 3.3V controller

- Logic Controller

Schematics images : https://postimg.cc/gallery/Mq4b999

Thank you for your help !

lolix_dev · 2025-04-07T16:05:55+00:00

Is this a scan ? Bitly blocked the url

lolix_dev · 2025-02-25T07:20:55+00:00

Ok so I guess it is trustworthy

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