A diode allows current to travel in only one direction. With that in mind, [Alex] built a mechanical diode that will only allow gear rotation in one direction to be transmitted through the system.

As active devices go, it doesn’t get much simpler than a diode. Two terminals. Current flows in one direction and not in the other. Simple, right? Well, then there are examples with useful side ...

This directional behavior is analogous to the way an electronic diode facilitates unidirectional current flow based ...

Diodes close diodeAn electrical device that allows current to flow in one direction only. are electronic components that can be used to regulate the voltage in circuits and to make logic gates.

You should be able to recognise the graph of current against voltage for a diode. The diode has a very high resistance in one direction. This means that current can only flow in the other direction.