Using a small geared stepper it can rotate as slowly as you need. I am controlling it using a CNC shield v4 with an Arduino nano. It uses one 6809 bearing.

https://youtu.be/rC\_dt6k4iSE

And do not forget checking out this video in case you use the same board as I did: https://www.youtube.com/watch?v=1UKY1\_hOipQ

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Licence: Creative Commons - Attribution Category: DIY