I have gone through that; mp. I must say that was a good model ofcourse. But to be more specific, I have raised this question only to know construct an inverter (DC to AC) with a cheap and best technique. Also, at the times, I wanted to know about different techniques employed in the said project. Can you people please tell me about a best 50Hz, 12VDC to 220VAC inverter design technique. By the way, is the square wave AC suitable for home appliances' (tube light, incandescent light, induction motors, etc.) usage?