A gear drive, a ratcheted winding sprocket, and a ball chain gave the clock about one hundred minutes of runtime. Adding a recharging mechanism was fairly straightforward.

The gear ratio isn’t perfect — [Simon] calculates its drift to be 20 hours over a year -but it’s close enough for the clock’s given purpose of being a cool thing.

In this video, I fabricate a missing piece for a vintage punch clock using 3D printing technology. The piece is designed in ...

Based on the innovative rolling ball clock design created by Harley Mayenschein back in the 1970s, this awesome 3D-printed variation is yours to make at home, courtesy of free online instructions ...

Gadgets 3D-Printed Playing Card Clock Gives Vegas Spin to Old-School Flip Clocks A traditional flip clock gets an upgrade Kenny Rogers would have loved.