STM32 development board

STM32F103R,GD32F103R,CH32F103R,HK32F103R......

32 microcontroller is so expensive, what should I do? ?

It must be more suitable to make it into a core board and play with it repeatedly than to use it directly in the project.

The STM32F103RC board on Taobao is very common. I bought one before. The information provided by the merchant was very random, but the circuit of this board seems to be compatible with the Atom MINI board, so there should be no problem in playing it.

There is only one picture of the schematic in the Taobao information, but fortunately it is quite clear⬇

Then the PCB is also a broken picture⬇

So, I had to pull the string myself.

A few changes have been made:

1. The four corner positioning holes do not use pads, but ordinary through holes.
2. Mini USB is changed to micro USB. I don’t know how to solder Type C, so there is no development at the moment.
3. Two pairs of power pins have been added. The original version didn't even have a single power source connected. What can it do with just the board? ?
4. there is none left

I couldn't find the 2x13 pin header, I used the 3D package of the female header.

I personally think that even if the component numbers are placed neatly, the circuit board will become cluttered. The components do not retain any numbers and names. Because I learned about visual BOM, I found that it is really fancy and practical. Please click here for details.