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[Verified] 51 minimum system board [CH340N+ expansion interface]

Overview

emm, 51 minimum system board, with download circuit, including download indicator light, and also has a separate serial download interface, which can be connected to an external downloader. Pin and female headers, wire-to-board holder, convenient for expansion and extraction of IO ports.
The unboxing video seems to be of low quality, so please don’t mind. https://www.bilibili.com/video/BV1N24y1b7Wx?t=1.4

Project Log: Second Edition [2023/06/01]
1. Optimize some wiring, make the wiring more reasonable, and thicken the power cord.
2. Change the layout spacing of the download base and do not interfere with the locking handle, hehe.
3. Change some capacitor packages to increase the withstand voltage and capacitance values.

[Remarks]
Any commercial use by anyone is prohibited

Design Files

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Update:2025-05-09 16:37:26

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