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9.9 yuan to make a ST-Link_V2J40.M27

Overview

The Hezhou AIR32F103CBT6 development board is 9.9 yuan with free shipping. After being flashed to ST-Link, there is no indicator light. In the spirit of getting the most out of it, making a ST-Link with the lowest cost is my original idea. After using the original circuit board through Jiali Chuang's free board, you can make your own ST-Link by adding only one resistor and one LED. Remove the original LED lamp beads and current limiting resistors, and then add a current limiting resistor and LED to complete it. If you think the 3V3 current of the original circuit is too small, you can also weld the spare conversion circuit, and use the original VBUS to fly directly to the PB6 pin (note: do not weld the corresponding pin header).

It is recommended to select the mode: STM32+Mass storage+VCP. This mode is the most stable for upgrading and use.

See the attachment or the link below for the flashing file and tutorial.

https://blog.csdn.net/gonglitian88/article/details/126406578

Design Files

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Update:2025-06-17 23:48:39

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