Hello and Thanks, now i have the question, you said some replies up, you will not use to give power to a computer, because it needs a sin wave, then if the effective value for a wave is -> Vf / (2^(0'5) and 220V/(2^(0'5) = 156 V
if you use a Transformer 12 - 0 - 12 To 156 will be usefull...