Numechron digital clock

[DickB]

Some of you may recall the digital clock that I built for the 2014 contest. I finally got around to building one for myself. I built a case for the original one, which was inspired by the Pennwood Model 1364 art deco digital clock, but I decided to keep this one exposed. It's interesting to see it operate.



The clock is driven by a synchronous motor used in time clocks and is very accurate. Frederick Greenawalt came up with and patented the mechanism for this type of clock in 1933. I referenced the original patent to design the almost 70 parts of this clock.