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LEGO® Turing Machine

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In honor of Alan Turing's 100th birthday, two scientists at the Dutch CWI have built a turing machine using LEGO® MINDSTORMS NXT:



With a turing machine, every problem can be solved that is computable by a computer.
Yet, it requires an infinite input tape, which is somewhat difficult to implement with a LEGO® model - so the creators limited it to just 32 positions.

More details can be found here.
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