A modern recreation of the Digi-Comp II, a classic mechanical educational computer kit from the 1960's.
The Digi-Comp II used rolling marbles as its mechanism, interacting with flip-flop gates and switches that controlled its operation.
Evil Mad Scientist Laboratories is the blog and R&D arm of Evil Mad Science LLC, a small family business designing and producing DIY & open source hardware for art, education, and world domination.