In small electronic projects that need an AC supply, the conversion of DC into an AC supply is a big deal. Even in big projects designers need to convert the DC voltages. For example, we all are conscious of electrical load shedding. Hence, have used or seen the UPS systems. And, if you are familiar with the UPS, then you must have seen the battery of this UPS. Certainly, this battery is a DC battery. However, the appliances we use in our homes are AC appliances. In the same vein, Solar backup systems, conditioning systems also require AC voltages. Therefore, an inverter is required to convert the DC voltage into an AC voltage.
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In this circuit, the IC CD4047 is the central element. The IC is wired as an astable multivibrator. This has been achieved with the help of a potentiometer VR1 in the circuit. By varying this potentiometer and capacitor C1, one can get different ranges of output pulses at pin 10 and 11 of an IC. On the other hand, drain pins of Mosfets are wired with the secondary of the transformer in the circuit. And, source pins are connected to the negative terminal of the battery.