Digi-Comp II: A Mechanical Computer

Published by patrick honner on

The folks at EvilMadScientist.com bring you a giant working replica of the Digi-Comp II, a 60s-era build-it-yourself computer kit:


After the switches are initialized to choose the operation, the machine channels a stream of pool balls through various binary gates to effect addition, multiplication, and other basic mathematical and computational procedures.   For more information, check out www.digi-compii.com.

As a pure math person, I never fully appreciated these mechanical computers.  But after seeing things like the Digi-Comp, cam-based mathematics, and various mechanical calculators, I’m developing a genuine respect for them

patrick honner

Math teacher in Brooklyn, New York


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