Question

Explain the concept of controlling electrical circuit remotely.

Answer 1

The concept of controlling a circuit by remotely involves use of microcontroller.Relays and transistors are often used alongside.

Whena command is giving to the microcontroller to turn on the load, the microcontroller pin is set to some voltage which turns on the NPN transistor. When the transistor is ON current flows from collector to emitter of the transistor which actuates the relay and relay connects the AC voltage to the circuit breaker which turns on the circuit breaker