I have a small circuit... transistor, transformer, resistor, and a diode. I have it powered by a battery. And everything is on a switch. However, when I turn the switch off, nothing happens. The power is still running through it. I know the switch works, because when I connect the battery to the circuit while the switch is off, it stays off, but when i turn it on, the only way to turn it off is to disconnect the battery. Thanks for any help.