GD32-based desktop temporary adjustable power supply

Sometimes, when I need to adjust small circuits but don't have suitable power supply equipment on hand, I impulsively make one based on the GD32 core board . Luckily, I happened to catch an event from LCSC, and we hit it off immediately (doge emoji)

. The core board is LCSC's GD32F407VET6. The idea is to add a 2596 to achieve voltage regulation and meet power requirements. The sensor added to the schematic is just for "cultivating my mind" (Doge).

The main controller can be powered by a power bank, or by using the male connector of an XT30 to connect to DC power below 40V. It can also be powered by a computer's USB port, but if you want to use the voltage regulation function, the current from the USB power supply might not be enough.
The input and output of the voltage regulation section both support XT30 (you can also solder wires for input and output if you don't mind (Doge emoji)).
It has onboard relays, and by collecting voltage and current data to customize the output limit of the 2596, the relays stop it from working and trigger an alarm.
The OLED and the buttons are also customizable.
For convenience, four PWM outputs were brought out
, and a separate serial port was added for expansion.

Currently, everything is working normally.