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What is PWM dimming, and what are the alternatives?

Lots of modern phones use pulse width modulation, or PWM, to manage brightness. But what is PWM, why is it harmful, and what ...
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PWM Pulse Width Modulation; Basics and Some Advanced Concepts

Pulse Width Modulation (PWM) is a basic concept that is employed in many areas of electronics. PWM is a simple averaging method that is used in everything from microwave power percentages to LED ...