Hans Andersson, well-known for his Rubik's Cube - and Sudoku - solving NXT robots, has published a new great creation of his: the Time Twister, a digital clock made from LEGO® MINDSTORMS.
I think this is an incredible project. This is another method for digital clock face which also deserves a mention: http://www.youtube.com/watch?v=tyijTDuotu4
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http://www.youtube.com/watch?v=tyijTDuotu4