Plotclock is a robotic clock that uses an arm to write the time on a mini whiteboard with a dry erase marker. After it writes out the time, it erases the numerals with an eraser and begins anew. It is controlled by an microcontroller, and can be made with a 3D printer or laser cutter. Newly upgraded version adds clock chip and LCD module.It's more flexible to assemble the main board on the bottom board.
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