There are LEGO clocks and then there are LEGO Mindstorms-powered, Bluetooth-connected, time-twisting clocks. This incredible clockwork creation, aptly named Time Twister, by Hans Andersson is one such clock, and perhaps the only such clock.
According to Andersson, the clock runs thanks to two Mindstorms cores located behind the two center digits. These communicate wirelessly via Bluetooth in order to stay in sync. To display a different time, the six rows that make up each digit twist left and right until they are properly reconfigured into the next number. It’s amazing to watch, which is what I suggest you do.
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