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Published on Jul 30, 2016
Time Twister 4 is a digital clock built entirely out of LEGO bricks. It is powered by LEGO Mindstorms. The clock display is made up of a matrix of cubes that can be pushed out to show the time.
Each digit is powered with a motor that drives a conveyor belt with small knobs arranged in patterns that affects a mechanism that pushes or retracts the cubes. (The 10-hour digit is simpler since it only needs to show the digit 1 or no digit at all)