A rotating beam with two orange arms mounted above the Lego tape can flip the black switches in both directions - either inscribing a symbol on the tape or erasing it.
Photo: Centrum Wiskunde & Informatica
Lego Turing Machine: The building blocks of computing in play
by Nick Heath | June 22, 2012, 8:38am PDT | Image 4 of 10
Image 4 of 10
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