Turntable overkill

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I took an evening and built myself a little display turn table, using a stepper motor ripped from an old printer, hooked up to an Arduino running grbl (software for controlling a CNC machine) and a motor control circuit that I built ages ago.

The electronics is overkill, but it works great and I will at some point shrink it down to just a simple motor controller and an on/off button or something :)