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Pulse Width Modulation (PWM)

maker

PWM is a modulation technique used to encode information into a pulsing signal by varying the pulse width.

expanded

Pulse Width Modulation (PWM) is a robust method used to control the power delivered to electrical devices by manipulating the duty cycle of a square wave signal. This technique is pivotal in applications such as motor speed control and LED light dimming, providing precise control over energy use. PWM is widely favored in embedded systems due to its efficiency and ease of implementation in digital signal processors.

examples

The Arduino Uno utilizes PWM to digitally control motor speed by varying the motor's supply voltage.

Common in prototyping and DIY projects to manage DC motor speeds effectively.

In computer cooling systems, PWM is used to adjust fan speed automatically between 600 RPM to 2000 RPM based on thermal requirements.

Critical in maintaining optimal thermal conditions in personal computer systems.

related terms

Pulse Width Modulation (PWM)
PWM is a modulation technique used to encode information into a pulsing signal by varying the pulse width.
Power supply
A device that provides electrical power to an electrical load, converting from one form of energy to electrical energy.
Stepper motor
A stepper motor is an electromechanical device that converts electrical pulses into discrete mechanical movements.
Potentiometer
A potentiometer is a three-terminal resistor with a rotating or sliding contact that forms an adjustable voltage divider.
Converter
A device that transforms electrical signals or power from one format to another.