I remember Nikola Tesla was working on generating "electricity out of thin air" and someone on youtube even has a working model of it. It hovered around 48 volts, so you'd need some kind of voltage regulator in front of it.
At least, you can show some respect to him and read a bit to understand his inventions. He developed the alternating-current power system that provides electricity for homes and buildings, so without you may not have typed your comment.
Of course you can get voltage out of it, now try to get useful power from it!