Unquestionably, the guts of input devices are pretty cool to look at.
But how well do you know the components that make up a PC?
Sony PlayStation controllers or other gamepads will be similar inside.

These voltages are calibrated so that they give a value for the position of the joystick.
Not all gamepads use such a system, though.
drifting: where dirt and damage in the potentiometers leads to the controller registering a constant joystick movement.
These just handle direct physical inputs and there are others that can track eye movement or entire bodies.