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Pulse-width modulation
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===Soft-blinking LED indicator=== PWM techniques would typically be used to make some indicator (like an [[LED]]) ''soft blink''. The light will slowly go from dark to full intensity, and slowly dimmed to dark again. Then it repeats. The period would be several soft blinks per second up to several seconds for one blink. An indicator of this type would not disturb as much as a ''hard-blinking'' on/off indicator. The indicator lamp on the [[IBook|Apple iBook G4, PowerBook 6,7 (2005)]] was of this type. This kind of indicator is also called ''pulsing glow'', as opposed to calling it ''flashing''.
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