Diode

Diode explained in an easy to understand way:

Imagine trying to walk through a revolving door that only allows you to enter the building but not exit through the same side. Just like this door, a diode is an electronic component that only allows electrical current to flow in one direction, preventing it from going back the other way. The revolving door acts as a barrier that controls the flow of people, much like how a diode regulates the direction of current flow in a circuit, ensuring it only moves forward, much like how you can only move into the building through the revolving door.