If you need a motorized turntable for filming or simply to display your latest project, here’s an easy 3D-printable option from Ali of Potent Printables.
The design takes two forms—one using a full-sized hobby servo, and a smaller version that employs a micro servo for motion, both of which are set up for continuous rotation.
Electronics for the project are fairly straightforward, with an Arduino Uno powering the tables via an Adafruit Motor Shield. While this could be expanded for different I/O or sensor use, the clever bit of this configuration is its interchangeable design. A master circle is connected to the servo horn, while the swappable plates attach to it with magnets, accommodating a flat surface, mounting holes, or even LEGO bricks.