I'll use a very simple example here. Say I have a PlayStation2 controller. Say I also have a circuit consisting of just a battery and a light bulb. I want to make it so when I press the up button on the D-pad, the light comes on. I don't want to have to use anything complex, and I don't want to use any other parts of the controller, only that one button. Would it be possible to take that controller apart and solder 2 wires onto the board so it closes the circuit when that button is pressed? Just to make it as clear as possible I have a battery, with a wire running to a light bulb, with a wire running to the controller, and the last wire running to the other terminal on the battery. I already can (and have) done this with other kinds of buttons and various switches, but the buttons in game controllers operate differently. They don't have pins to solder the wires to. So where do I need to attach my wires to make the up button the PS2 controller work just like any simple button or switch?