Role: adjust the voltage (including DC voltage and signal voltage) and the size of the current.
1. Used as a voltage divider:The potentiometer is a continuously adjustable resistor. When the knob or slider of the potentiometer is adjusted, the movable contact slides on the resistor body.
2. Used as a varistor:When the potentiometer is used as a varistor, it should be connected to the two ends of the device to obtain a smooth and continuously changing resistance value.
3. Used as a current controller:When the potentiometer is used as a current controller, one of the selected current outputs must be the sliding contact terminal