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Sam Goldheart编辑

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[* black] Check out the potentiometers as we jog that dial…
-[* black] What's a potentiometer, you ask? Good question.
+[* icon_note] What's a potentiometer, you ask? Good question.
[* black] A potentiometer is a special resistor that has multiple terminals and an adjustable voltage divider.
[* black] A mechanical action, in this case the movement of the joystick, changes the resistance of each potentiometer. Measuring the voltage through each potentiometer indicates the joystick's deflection along two axes, pinpointing its position.