
Computers add numbers together using logic gates built out of transistors. But they don't have to be! They can be built out of greedy cup siphons instead! I used specially designed siphones to works as XOR and AND gates and chained them together so they add 4 digit binary numbers.
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Image credits:
Zoom in on transistor - NISENet
Moniac - Matt Brown
Moniac - Paul Downey
Moniac - Tiia Monto
Moniac - Marcin Wichary
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