stm32 minimal system

This system uses stm32f103c8t6. It costs about 11 yuan each in the mall. It is very cheap. The resistors and capacitors are all made of 1206, which is convenient for soldering. All the interfaces have been led out. In addition, a USB interface has been added for convenient power supply. Friends who like to reduce the voltage through ams1117 Like, thank you. The development board supports 36 IO pins. There are three LED indicators on it. It also provides two buttons, one to wake up and one key1, and a separate reset. The resistors and capacitors are all packaged in 1206, which is convenient for us to weld. It is very suitable for students with weak foundation. After we power on and reset, we can use the serial port to ttl burner to help him burn the program. I mainly introduce the hardware aspect and introduce the 3.3V and 5V power supply parts. Unfortunately, there is no Integrate the programmer onto it because you can have multiple development boards and waste serial port chips. The crystal oscillator frequency is 8MHZ, and there is also a 32khZ. The price is very cheap, less than one yuan. Friends who like it can choose by themselves. You can also place an order directly according to my BOM, or change it to 0805 package for soldering, so that we can save money. I will continue to release interesting projects in the next big area.