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CH340N_USB_TTL automatic downloader

 
Overview

This design is an automatic downloader based on CH340N and STC15W104. It switches between two different power supply modes through one switch and exchanges the TXD RXD pins through another switch.
The program comes from the Internet, please keep the original author information.
※※※※※This program is strictly prohibited for commercial use, and the permissions belong to the author ※※※※※
The program and functions have been verified
参考设计图片
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Update:2025-06-18 23:18:55

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