Super mini T12 soldering station

In the schematic diagram, the DP2 and DN2 network logos of the typec port are reversed. The positions are correct but the leads are reversed. I don’t know if this explanation is clear. The phenomenon is that the typec port is recognized when inserted from the front and not recognized when inserted from the back. This has been modified. Thanks to hkchenhao  for pointing out the problem.

The design process and demonstration video are at Station B https://www.bilibili.com/video/BV1BS4y1N7Be?share_source=copy_web

The MCU uses stm32f103c8t6, ​​aluminum profile casing, and has 2 buttons for operation. The buttons are reused to realize the "up" and "down" button functions, as well as ISP download mode switching and power on and off functions. OLED displays temperature and voltage, op amp amplifies, MCU internal ADC samples soldering iron thermocouple voltage and current during heating. The code is generated using the Stm32CubeMX template. Functions currently implemented

1. Button to power on and off

1. Heat up the soldering iron

5. Indicator light, OLED screen

2. Adjust the temperature

3. Leave to sleep

4. ISP upgrade procedure