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Brittany McCrigler编辑

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[* black] Check out the potentiometers as we jog that dial...
+[* black] What's a potentiometer? 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, adjusts the voltage divider, allowing different voltages to flow through each terminal. The difference in volatages is "read" at each terminal to determine how much you are tilting the joystick.