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need not to be.. if there is a change in dc voltage wrt time , there is an ac component , all u need is a capacitor to block dc and get ac.Asjad said:Dear Friend,
In DC pulses the voltage only changes from 0v, to a positive voltage.
To get AC you would need to have say +5v, 0v and -5v
With PWM the time for one complete cycle varies, usually used for power control
Hope this helps
liquidics said:If I toggle a DC source on and off does that generate a half-wave AC source or is there more to it?