To take advantage of PWMIn digital systems, it will have a High and Low signals just imagine if want to apply digital system to control devices that control with analog, such as inversion of control motor speed, the ability to control the brightness of the light bulb, etc.In a digital system, will not be able to control these devices, we will have to take it straight in the PWM control will adjust the period of High-Low (Duty cycle), as in the following example.A 50% Duty cycle means that the period for which a High 50% and 50%, that is the Low period.25% Duty cycle means that the period for which a High 25% and 75%, that is the Low period.80% Duty cycle means that the period is a High 80%, and the period for which a Low 20%.
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