Low-cost, rechargeable electric screwdriver

The V2 introduction video can be found
at: https://www.bilibili.com/video/BV1Mt421J74q/?vd_source=9ac3721bf39ed0132a8f45bfba4f952a#reply1802879915 and https://www.bilibili.com/video/BV1qV4y1f7hW/?spm_id_from=333.999.0.0
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https://gitee.com/lalhan/ten-yuan-electric-screwdriver
Component Sharing

1. Lithium battery powered, rechargeable via Type-C
2. No microcontroller required, supports forward and reverse rotation
3. Built-in side-emitting LEDs for LED lighting
4. Automatic sleep mode to save power
5. 5V motor with a large reduction ratio, almost achieving "manual/automatic" operation

 
Known issues: 1. Previously, to print the outer shell simultaneously, some capacitors and resistors were placed on the back. Now, heat shrink tubing is used, allowing the resistors and capacitors to be placed back on the front. 2. The LED position is adjustable; using an extended version brings it closer to the front. 3. This motor is a 5V motor, so a boost converter is not used. If using an N20 motor, consider using an SX1308 boost converter to 12V to balance torque and speed.