Uploaded November 2022 | Updated September 2026, 2 weeks ago

---

June 3rd, 2024 : The new Hollow Clock V is released! youtu.be/h_1ewbybEOo

New version of the Hollow Clock is released. Contrary to the former version (Hollow Clock 3, youtube.com/watch?v=XCOC2zNjWCg ), the angle of the hour hand is controlled not mechanically but magnetically.

The 3D data and code are published for free at
instructables.com/Hollow-Clock-4
thingiverse.com/thing:5636482

Former projects:
Hollow Clock 3 : youtu.be/XCOC2zNjWCg
Hollow Clock 2 : youtu.be/TL-U4IecYIA

Other projects : shiura.com/dfab/index-en.html