Switch Definition

Basics

Switch Definition

A switch responds to an external force to mechanically change an electric signal. Switches are used to turn electric circuits ON and OFF and to switch electric circuits.

1. Circuit ON/OFF Operation

  • The contacts are separated while the switch is not pressed, so the circuit is not connected and the lamp is not lit.
  • Circuit ON/OFF Operation
  • When the switch is pressed, the contacts come into contact, closing the circuit and lighting the lamp.

2. Circuit Switching Operation

  • While the switch is not operated, the lamp on circuit L1 is lit.
  • Circuit Switching Operation
  • When the switch is pressed, the circuit is switched so that the lamp on circuit L2 is lit.