Automatic Changeover Switch Circuit in Hindi/Urdu AC 220v to 9v DC

  • Published on Aug 10, 2018
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    are driven either by a battery or an AC-DC power supply. Youtube '''''


    power is made available mostly through AC supply mains, DC power is made available through batteries. However there are circumstances when there is a scarcity of AC power (through power failure) or DC power (due to limited lifetime of batteries). To overcome this problem, we usually come across many alternatives. For example we can use generators or inverters in emergency cases to get AC power when the mains supply is switched off. Similarly in case of DC power, we can use either a battery or an AC to DC power supply in alternative. Here this article presents the principle, design and operation of a automatic changeover circuit wherein a DC load like a series of


    or AC power for their operation. While


    in Hindi/Urdu Many electrical and electronic appliances require