Original author: [45coll]https://lceda.cn/45coll
This version is a modified version
1. Remove ch340 and automatic download circuit and replace with rx tx pin
2. TPS54331 is changed to 5V output to supply power to RGB lights, and 5V is input to ams1117-3.3
3. Reserve 2 touch areas and add esp32 status lights
Use the empty board on the back to change the three copper pillars to GND, 5V (input or output), RGB input or output, and can be changed to wireless charging input through jumpers, or the back-end RGB can be continued.
The RGB lamp and the USB socket pad are close to each other. When welding, you need to pay attention to check whether there is a short circuit.
The installation of copper pillars may cause a short circuit with the PCB. Measure or install gasket insulation after installation.
20211212
R4 and R8 of TPS54331 are set to work at 9V and will not work below 9V to prevent battery over-discharge.
This project has not been verified
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