What is Pulse Width Modulation? How to generate PWM signal ? Pulse Width Modulation Explained

In this video, the pulse width modulation is explained using the example.

By watching this video, you will learn the following topics:

1) What is Pulse Width Modulation

2) The applications of Pulse Width Modulation

3) Duty Cycle and Switching Frequency of PWM Signal

4) How PWM is effective than conventional methods

5) How to Generate PWM signal?


What is Pulse Width Modulation:

It is a modulation technique where changing the width of the digital control signal, the power delivered to any load is controlled.

Because of its precise control over the controlled parameter, low power loss and high efficiency this technique is used in a wide range of applications.

Applications of Pulse Width Modulation:

1) Dimming the LED Lights
2) Controlling the fan speed of CPU (Controlling the speed of DC Motor)
3) Controlling the brightness of the display in laptops
4) In power supplies (DC-DC converter, SMPS etc)

In this video, the pulse width modulation technique is explained by taking the example of the LED circuit.
In the video, it has been explained that how the brightness of the LED can be controlled using this pulse width modulation technique and how it is superior to the conventional method.

Duty cycle and Switching Frequency of the PWM signal:

With PWM signal two parameters are always associated:
1) Duty Cycle
2) Switching Frequency

Switching Frequency defines how fast the switching takes place. It defines the time period of the PWM signal

The Duty Cycle defines the ON time of the pulse. It is the ratio of the On time of the pulse to the total time period.

How to Generate PWM Signal:

There are many ways PWM signal can be generated. In the video, three simple ways have been explained.

1) Using Comparator
2) Using 555 timer IC
3) Using Microcontroller board (Arduino)

This video will be helpful to everyone in understanding what is Pulse Width Modulation and how it can be used for controlling the different devices.

#PWM
#PulseWidthModulation

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