Stepping turntable

The turntable consists of four parts:
1. Mainboard: Contains the drive control circuit and stepper motor.
2. Side plates: Four side plates are inserted into the mainboard to support the turntable.
3. Turntable: Printed on an aluminum substrate, with positioning controls, and replaceable.
4. Support wheels: The support wheels are fixed to the side plates with screws using a circuit board and bearings.
 
See the image below for the finished product.
After final assembly, use super glue to secure the side plates, and it's ready to use.
The program is currently being improved, and interfaces for infrared and wireless control are reserved in the circuit. The program currently supports button direction control, start/stop, and speed adjustment. A WS2812 LED is designed on the circuit board for illumination from below the turntable. The turntable material is replaceable. Space is reserved below for a lithium battery, which can be powered by a lithium battery and a boost module.