On the lower PCB, we get a good look at one of the two analog joysticks. Its spring-loaded movement is tracked by two potentiometers that measure degrees of tilt in two axes.

Potentiometers are analog devices that vary their resistance with position—this makes for an ideal low-power sensor, as only a small amount of power is required to measure resistance.

With a quick flick of a plastic opening tool, we release the plastic clips holding the shoulder buttons spring assembly in place.