The Basic Knowledge You Should Know about Pulse Width Modulation!

Most of you here have heard Pulse Width Modulation (PWM) at least once in your life, but how well do you know about this PWM? If you want to unveil the mystery of PWM, then you need to spend a few minutes reading this article…

Pulse Width Modulation

For your information, Pulse Width Modulation (PWM) is a compelling technique that uses for controlling analog circuits with a microprocessor’s digital outputs. PWM is fully employed in various applications, where it can be ranged from measurement and communications to power control and conversion.

Analog voltages and currents can control things directly, like the volume of a car radio. In a simple analog radio, a knob is connected to a variable resistor. As you turn the knob, the resistance goes up or down. When this situation happens, the current flowing through the resistor will be increased or decreased. This will change the amount of current driving the speakers, thus increasing or decreasing the volume simultaneously.

An analog circuit is one, like the radio, whose output is linearly proportional to its input. As a result, you can use them to dim LEDs, control fans and motors’ speed, or control the power doing to a thermoelectric cooler! [more]

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