In the summer of 2020 I needed an automatic turntable for doing photogrammetry on small objects. Having had no idea about electronics (or building anything else really) I built the most basic one I could come up with.
It's (almost) all parts from an Arduino Beginner Kit, so in theory you could even build it without soldering. The Arduino controls the stepper motor and a relay. The relay triggers the DSLR using a disassembled cable trigger. A switch was used to define the time the Arduino has to wait for the camera to finish and to continue rotating the platform. Two start buttons let you chose the number of pictures to take (basically the number of divisions of the 360° rotation).
Fortunately, an old Lego tire fit perfectly on the small stepper motor shaft, so the only thing left to do was drilling some holes into a "Hama" plastic turntable and attach it and the motor to a wooden base plate.
Currently I'm working on finishing my turntable V2 with more features and expandability... and arguably a more professional look 😃.
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