The mechanical display is almost entirely made of 3D printed components ... Evertyhing is controlled by an Arduino Mega, acoompanied by a DS3231 RTC and eight ULN2003-based stepper motor drivers.
The servo relies on 3D printed gears in a 3D printed housing ... via a magnet mounted in the servo’s gear. An Arduino is used to determine the servo’s current position versus the desired ...
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