Electronics Fundamentals/Electromagnetic Devices/Relay

Relay
Relay is an Electromagnetic switch. It operates on the principle of Electromagnetic Force that creates from a current conducting coil that push or pull   the switch contacts to open or close the circuit.Relay is used in many applications like as vehicle indicator etc.

Construction

 * Relay_Parts.jpg

Relay Types

 * Relay_symbols.svg

Reference

 * 1) Relay