Friday, 15 June 2012

PWM (Pulse Width Modulation)

     PWM is a mechanism for generating an output signal over the period between high and low where we can control the duration of high and low signal in accordance with what we want. Percent duty cycle is the period of high signal and the signal period, the percentage of duty cycle will be directly proportional to the average voltage produced. The following illustration of the PWM signal, eg, high condition 5 V and the condition of low 0 V. Setting a pulse width modulation or PWM is one technique that "powerful" as used in the current control system. Width modulation is used in different settings very broad field, one of which is: speed control, power control, measurement and communication.

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