This is a common idea that has some history and recent practical implementations, ex: https://www.niklasroy.com/workshop/184/PneumaticComputing https://www.nik

This is a common idea that has some history and recent practical implementations, ex: https://www.niklasroy.com/workshop/184/PneumaticComputing https://www.niklasroy.com/workshop/184/PneumaticComputing I think his or gate is overthinking the issue. The only thing needed is a bunch of one way valves on each of the inputs, thus creating a sort of "wired OR": any input can create pressure on the output but that pressure can't disspate back to the unpressurized inputs. By passing this "valve OR" through a single amplifier element set up as an inverter you get NOR gates which can have a large number of inputs and can be futurer used to synthesise any circuit.