I wanted to have gears to represent the bits in the calculator. This way clockwise could be one and anticlockwise would be zero - but it would also allow for gears that are un-powered, which is actually quite important in real computers (a zero in a real computer is not actually no voltage).

One wayClutch Bearing

In order to do this the way I would prefer to design it, I would need a logic gate (or technically two) that would only allow power of a certain direction through. i.e. if the input was clockwise it would turn clockwise, if the input was counter clockwise it wouldn't turn at all. This would make making other logic gates way easier, and allow making something bigger because you would not have to worry about conflicting power sources messing everything up (one of the reasons real computers do this).

One-way clutch types

So I tried looking up some gadget that could do that and the closest thing I could find is a clutch... but I'm worried it would destroy the motor if it tried to spin the wrong way. It would also stop the input from spinning, which would ruin one of the advantages of doing this as it would prevent any other system from receiving that power.

One wayclutch diagram

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One way gearmechanism

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But anyway I would prefer something different anyway, because it would be a massive advantage if this thing could still let the input spin either way while doing it's job - which it seems like clutches don't do?

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One waySprag clutch

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One waybearing SKF

PS if anyone would like to join me in designing and maybe even making the mechanical calculator it might be a fun project and would help me a lot - I'm not an engineer and I don't really know the engineering side - just the theoretical and computing/mathematical side.

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Every demonstration of a clutch I have found shows someone trying to turn the thing backwards manually, and every time they show that it simply wont spin. It seems like that could break a motor or put a load of strain on it.

one-way clutch mechanism

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I'm trying to design something for a little fun, nothing serious. I always thought gears were cool as a kid and I recently learned about the analytical engine. I know a lot about computing and logic gates so I thought it would be fun to design a small mechanical calculator.

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