circuito conversor 220v a 110v
HI,
OK.
If your load have a constant 250w (+-2.5A) consumption at 110v, you can put a serial resistor, but in that case you need a resistor of 250w!!!
Definitively not a good choice.
The other way it's, make a rectifier to get a DC wave from the 220v line, and next you need to put a circuit that create a PWM wave where the fundamental wave are a 110v AC (maybe 60 HZ).
Note, in that case you must be careful with the load characteristic, if it is one AC motor, no problem, but if it is a electronic load...
Hope helps,
NeuralC