Mechanical Binary Adder

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A mechanical binary adder, that can add two 4bit-long numbers
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It’s things like this that make me love engineering

michaelfixedsys
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I love it! A tip: Instead of making the 1 bit adder ("half adder") with 2 AND-gates, 1 OR-gate and 1 NOT-gate, you could create it with just 1 AND-gate and 1 XOR-gate.

Yoctopory
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Lol the and-gate is exactly same i ''invented'' at school by my own.. What a shame but nice to see it in actual work.

ss-sqhn
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If you were going to make this bigger, into an actual computer, you'd need a way to amplify the signal. You wouldn't be able to actuate 100 gates by transmitting all the force through the first like that.

rorypenstock
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Is there any way you can mention what materials and the amount I need to make this. I am planning to do it with my 10 year old son. He is been trying to use anything he sees in the house but it is not working.

jenniferrivera
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Its really impressive, okay, but you can also make it more simple with a marble machine...
2023 edit: Really impressive creation! I don't know why I wrote it in a rude sounding way, back in 2019.

webbycroissant