A 4-bit Calculator made in cardboard and marble
Posted by jpluimers on 2017/11/14
Cool device: [WayBack] A 4-bit Calculator made in cardboard and marble
I really love this. Not just that it exists, but how it was made and how it’s explained.
Definitely worth reading.
via: [WayBack] Funny modern abacus https://lapinozz.github.io/learning/2016/11/19/calculator-with-caordboard-and-marbles.html – David Berneda – Google+
–jeroen
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