Uploaded February 2021 | Updated September 2026, 3 weeks ago

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Silent and smooth : stepping motor version of "Hollow Clock", thingiverse.com/thing:4747403
Easy operation : super-easy time adjustment
Easy print : printable without supports
Easy assembly : gears can be set by just sliding in
Cheap : used stepping motor is very popular and cheap (around 3USD with amp circuitry)

3D data and codes are at
Thingiverse : thingiverse.com/thing:4761858
instructables : instructables.com/Hollow-Clock-2

You may be interested in the new "Hollow Clock 3",
youtu.be/XCOC2zNjWCg

My works on digital fabrication:
shiura.com/dfab/index-en.html
Please subscribe my YouTube channel if you like!