A switch is an electronic element that opens a circuit, interrupts a current, or causes it to flow to another circuit.
The principle of the switch is that the "closed" of the contact means that the electronic contact is on and the current is allowed to flow.
"Open," "open," means that the electron contact is not conducting to form an open circuit that does not allow current to flow through.
According to the purpose, it is divided into wave switch, band switch, VCD switch, power switch, pre-selected switch, limit switch and so on.
According to the structure, it is divided into micro switch, boat switch, toggle switch, toggle switch and so on.