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Cracking the cube

lego-mindstorms rubiks-cube
I can’t take any credit for this. Earlier this summer, I built a Rubik’s cube solver from a Lego Mindstorms set. I simply followed the plans for the Mindcuber design. It seemed to work quite well, but my Rubik’s cube had one face which was much stiffer to rotate than others, and the power available from the Lego motors was insufficient to reliably turn it. So it’s been …