Oct 25, 2025
INSANELY impressive video. Watch if you like engines, or maths.
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INSANELY impressive video. Watch if you like engines, or maths.
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4-Stroke Clock Fires On All Cylinders
We love a good clock build around here, especially if it tells time in a unique way. This 4-stroke digital clock designed by [lagsilva] takes the checkered flag in that category. As it displays the time, it also demonstrates the operation of an internal combustion engine. The numbers take the form of pistons and dance an endless repetition of intake, compression, combustion, exhaust. The clock’s digits are made from two LED matrices driven by an Arduino Uno and a couple of MAX7219 driver boards. The dots that form the digits move up and down the matrices in 1-3-4-2 firing order. …read more http://pje.fyi/QG0R8g