The relay is an electromechanical switch which is used for controlling the circuits.
The most common and basic construction of relay involves a coil and a switch. The coil can be energized to control the behavior of relay.
List of Contents
Difference between NO and NC
Voltage and Current limitations for relays
Advantages and Disadvantages of Using a Relay
- It switches big loads with lower power losses
- It provides a galvanic isolation
- It is a slow device
- Its contacts wear out at the time
In this video, Great Scott delivers on basics of relay and why optocoupler is used with them.