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Submission + - The FIBIAC - a 3D printed electromechanical computer (

Brietech writes: "Behold the FIBIAC! Its loud! It computes! It uses actual punch cards!" The FIBIAC is a simple, stepper-motor based, (mostly) 3D-printed electromechanical computer. The program is stored on a loop of paper punch-cards, and the machine uses three, 3-digit electromechanical counters for storage (which could be expanded to support more complicated programs) Watch it in action computing the Fibonacci sequence, or jump on Thingiverse and build your own!
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The FIBIAC - a 3D printed electromechanical computer

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I have a theory that it's impossible to prove anything, but I can't prove it.