PWM stands for “Pulse Width Modulation.” It is a widely used technique in electronics and engineering for controlling the power delivered to various devices, such as motors, LEDs, and heaters. PWM works by rapidly switching a signal on and off at a specific frequency, and by varying the width or duty cycle of the “on” time within each cycle, the average power delivered to the device can be controlled.
In a PWM signal, the ratio of the time the signal is on (high) to the time it is off (low) is what determines the output power. If the signal is on for a longer duration within each cycle, the device receives more power, and if the signal is on for a shorter duration, the device receives less power.
PWM is highly versatile and efficient, making it suitable for a wide range of applications. It is commonly used in motor control to regulate speed, in LED lighting to control brightness, and in temperature control systems to maintain desired temperatures. The rapid switching between on and off states creates an average voltage or current level that can be finely adjusted, allowing for precise and dynamic control in various electronic and electrical systems.