Circuit schematic above is one of the voltage inverter circuit, starting from 6-Volt input on the DC current into 220-volt AC output. For maximum output power up to 30W only, and is also very small voltage current. Input voltage plus the entrance on the transistor Q2 to provide the voltage at the collector and then go on Circumference transformer
L1 and enter the base. Emitter will be merged ddengan voltage supplied L2 min. And LED 1 is useful as an indicator of whether or not an inverter works especially on the transistor Q2.