thingiverse
A clock design that consists of four main parts. Half of the clock is black and the other half is white, representing night and day respectively. There is a kinetic art of a swinging earth representing the shift between day and night. The earth is powered by the servo that can be placed in the middle of the clock. Time is shown via LEDs that is powered by the PCB chip. See Clymer's Arduino Clock for details.
Clymer's Arduino Clock:http://www.thingiverse.com/thing:1545926
My partner AJ of this clock design:http://www.thingiverse.com/DJ_AJ/about
Direct link to the original creator's page
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This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
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Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.