PlotClock is a mechanical 3D printed clock that writes the time with a marker on a small whiteboard. It continuously writes each minute, and after the time changes, it erases the previous time and writes the new one. The PlotClock is controlled by an Arduino microcontroller and it can be created with the use of a laser cutter or 3D printer. A lot of people are attempting to create their own PlotClock since the design is open-source. The instructions and 3D printed files can be found in the internet and have been made available by the designer.
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