Remote Control Circuit Breaker Using a Micro controller 2023:


We often come across a situation where we want to turn on an electrical load by pressing some buttons in a computer program. Consider an example, where you are sitting in a power plant and you want to turn on a circuit breaker remotely. Controlling the circuit breaker from a remote location can be achieved using a micro controller. We will discuss how to make one.

Remote Control Circuit Breaker Using a Micro controller.

  1. Micro controller (such as an Arduino).
  2. Transistor.
  3. Diode.
  4. Resistors.
  5. Relay.
  6. LED.
  7. PC (Personal Computer).

Micro controller:

A micro controller is an IC that has the intelligence to understand the commands received from the PC through a communication protocol. A micro controller has various communication protocols to communicate with a PC such as Serial, Ethernet and CAN (Controller Area Network) communication protocols.

A micro controller has many peripherals like GPIO (General Purpose Input Output) pins, ADC (Analog to Digital Converter), Timer, UART (Universal Asynchronous Receiver Transmitter) and Ethernet to communicate with the outside world. There are peripherals.
The digital output from the micro controller is a low amperage signal.

When you set a pin high, the voltage on that pin is usually +3.3V or +5V and the amperage it can source or sink is around 30mA. This is fine if you are controlling an LED that needs very little.

If we want to control a circuit breaker through a micro controller pin, we need a driver that can supply the required amount of current to the load to turn the switch on. You need a component between your micro controller and the device that will be controlled with a small voltage and current. Relays and transistors are often used for this purpose.


The transistor acts as a driver in this application to supply the required current to the relay so that it turns on in saturation mode.


Resistors are used to limit the current in LEDs, transistors.


A light emitting diode is used to indicate whether the circuit breaker is on or off.


A light emitting diode is used to indicate whether the circuit breaker is on or off.

Working Principle of Remote Controlling of Circuit Breaker by Micro controller:

Protection Diode:

When the relay is closed, a back e.m.f is generated which can damage the transistor if the magnitude of the back e.m.f is greater than the VCEO voltage of the transistor. A diode is used to protect the transistor as well as the digital output of the micro controller which conducts when the relay is closed. It is also called a freewheeling diode.

9 thoughts on “Remote Control Circuit Breaker Using a Micro controller 2023:”

  1. This article was so well articulated and informative. Whenever i face any kind of problem i know i will find the solutions here.

  2. Very valuable post as it explains the importance of its principles and main points of remote controlling circuits. Always feel amazed by this articles and highly recommended for knowledges

  3. This post amazingly explains the importance of the principles and points of remote controlling circuits. Highly recommended it to read specially for students.


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