I collected this homemade in order to be able to use power tools and other equipment away from the mains. The homemade product is called "A simple converter with 12 to 220V 50 Hz"
For the manufacture we need:
1) Two transistors KT315 (you can use any other with NPN conductivity)
2) Four transistors of the Mosfet type. IRFZ44 (you can use more powerful transistors)
3) Transformer with windings:
Primary winding = 220 V
Secondary windings two of 12 V
4) Low power switch
5) Resistors with a face value:
680 ohm 2 pieces
4.7 lump 2 pieces
6.2 Ohm 4 pieces (Can also be used on 10 Ohms)
6) Two electrolytic capacitors with a nominal value of 4.7 MF
7) Aluminum radiators
8) Four insulating gaskets for transistors (Not necessary. If transistors of one arm are on one radiator, and transistors of the other arm are on another radiator. And the radiators are not interconnected)
9) Four bolts with plastic washers (Not necessary. If the transistors of one shoulder are on one radiator, and the transistors of the other shoulder are on another radiator. And the radiators are not interconnected)
10) Jumpers
11) Circuit board.
Scheme.
The power of my converter is approximately 1000 watts.