I present to you my fifth version of the turntable for product presentation and photography/filming.
The whole system is powered by a cheap "arduino" motor and powered by 5V from USB. The speed of rotation is ensured by the PWM regulator (it is also possible to use a potentiometer, I have not tried)
For assembly, you need 2x M3-20 screws with a lock nut (it is not necessary, it can be an ordinary one) to secure the motor. Next, the cover, in which the potentiometer/pwm regulator is built, is attached to the base with two M3-8 screws (10), or the inside is secured with a nut - again this is not a condition, you can screw the screws directly into the plastic. The last screw (M3-10) secures the cover of the middle gear (I recommend not to tighten it too much, it's just a safeguard against the wheel falling out). This cover is not necessary, it is there "just in case".
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Material:
https://www.aliexpress.com/item/1005006443688845.html
The author marked this model as their own original creation.