This mechanical clock tells time using steel balls


This mechanical clock tells time using steel balls

Arduino TeamOctober 11th, 2020

There’s certainly no shortage of DIY clocks in the Arduino community; however, Eric Nguyen has come up with a rather unique way of showing hours and minutes: steel balls arranged as seven-segment displays.

For each time change, the face rotates down and a tray of arranged balls is lifted up to meet it via a servo motor assembly. Inside, a series of 28 servos capture and release the balls using magnet and linkage systems, plus another for the colon.

The device is powered by a Nano along with an RTC module for accurate timekeeping, and two PCA9685 driver boards control the motors directly.

As illustrated in the videos below, it’s an incredible build from a mechanical standpoint. Making it even more impressive, this is actually Nguyen’s first Arduino project!

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