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! Link to Original Source
The most difficult thing in the world is to know how to do a thing and to
watch someone else doing it wrong, without commenting.
-- T.H. White