If you thought plot clocks that write on a tiny whiteboard were cool, this project takes things to the next level, jotting down the time not with a dry-erase marker, but with a UV LED on a glow-in-the-dark sticker.
The device itself uses an Arduino Uno for control, along with a RTC module for timekeeping, and a pair of servos that move the LED with custom linkages.
In addition to an awesome looking glow-surface, the clock has been upgraded with a full 3D-printed enclosure. For a quick overview of the project, you can check it out on Imgur. If you’d like to build your own, all the Arduino code and print files are available on Thingiverse.
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