
I have been fascinated by mechanical counters and calculating devices for years, I’m even searching for a book I saw decades ago that told how to build logic gates out of clothes pins, cardboard tubes, brass brads, and paper clips. It even had a way to build a binary counter out of all those things! Anyway, the LEGO Turing machine is an amazing device that lets you explore the ‘states’ of this deceptively simple machine.
Well, this Turing machine is not entirely mechanical… I used the RCX to store the transition table. Since the symbols are bar codes read with a light detector, it would have been very difficult to continue with a physical mechanism
[via MAKE]
LEGO Turing Machine



