HackSpace magazine

Servo Word Clock

By Ben Everard. Posted

This word clock is different to others. Where the traditional approach is to light up the words in order to spell out a phrase that tells the time, this version has all the letters lit at the same time – but not in focus. Each letter is lit from behind by an RGB LED mounted onto a linear actuator. To display the letter, the actuator brings that letter into focus; to stop displaying it, it moves the LED so that it’s not in focus.

So it’s simple in theory, but in practice, it uses 114 servos, 320 3D-printed parts, a custom PCB for the main electronics, a laser-cut acrylic case, and a whole lot of engineering precision.


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