In the picture, the silk screen printing of PA11 and PA12 pins is reversed. It has been fixed in the open source file. Please refer to the open source file.
The pin spacing design is crooked. . . It can no longer be inserted directly into the hole board. If you want to insert it, you can widen the board by 50mil, move the pin headers on both sides 25mil to both sides, and re-route the wires.
Empty board picture
Finished product pictures
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