Homemade 220V generator requires the following:
220V generator (housing, stator core, stator coil, rotor, permanent magnet, bearings, cooling blades, etc. .).
With a generator, you also need equipment to drive the generator: gasoline engine, diesel engine, fan blades, hydraulic turbine, etc.
It is impossible to make your own generator, so it is best to buy a ready-made one.
Disassemble a small DC motor from an old used tape recorder or DVD player, and install a small fan blade on the motor shaft, or buy it directly and make sure that it comes with a sun hat with a small fan, no batteries. Solder a light-emitting diode to the motor terminal, preferably red (catchy and low starting voltage). Use the wind to blow the fan blades to rotate the motor.