When we need to use an inverter. Sometimes we cannot find it. But We can build it easily. In two Circuit diagram below, just use 2 transistor,2 resistors, and one transformer only. They can convert 12VDC from battery to 220VAC or 120VAC to apply small light bulbs or lamps max 10 watts. Read more : [**Two Simplest Inverter Circuits using 2 transistors only**](https://www.eleccircuit.com/two-simplest-inverter-circuits-using-2-transistors-only/)