i have this audio transformer (about the size of a bottle cap) with three prongs on one side and two on the other. i am completely mystified by this configuration. how would i (say for example) hook up this transformer to a 9v battery in order to increase voltage? thx
The two wires on the one side of the transformer is the side for the primary windings; the side of the transformer with the three wires coming out is the secondary, and is center tapped. You cannot use a transformer with a battery because a transformer steps up or steps down a change in voltage (AC signal voltage), not DC voltage from a battery. Take an ohm meter and measure the resistance of the primary windings and that of the secondary, from outside lead to the other outside lead, then from one secondary lead to it center lead. It will tell you about the transformer's electrical configuration.
There is no reason why the higher output supply would draw more current. The input current to the supply is indeed proportional to the amount of power consumed on the other end. In addition, it is even possible that the new power supply might be more efficient, and use less power if you get a good one. Look for one that has a Green certification. One power supply can be more efficient than the other. No power supply is 100% efficient. For instance, if your PC needs 90 watts and your Power supply is 90% efficient, the supply will need to draw 100 watts from the AC mains. In any case, I don't think you will be using any more energy with the upgraded supply, perhaps even less, and your PC should even run cooler.
9v battery has a D.C. and a transformer only work in A.C. circuits.
