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Car potentiometers generally include car audio potentiometers, car air conditioning potentiometers and car navigation potentiometers. Potentiometers can be used for tuning, temperature regulation and function selection. This article introduces the wiring method of automobile potentiometer, and how to eliminate the noise of automobile potentiometer? Precautions for the use of car potentiometers, to help you better understand the car potentiometers. Wiring method of automobile potentiometer When the automobile potentiometer is installed in the circuit, it should ensure the correct wiring connection of the three pins. Generally, in the volume control circuit, the first pin of the potentiometer should be connected to the signal ground wire, the second pin is connected to the signal output wire, and the third pin is connected to the borrowing signal input wire. However, it should be noted that if the wires at both ends of pin 1 and pin 3 are connected reversely, it will cause the volume of the potentiometer to become smaller and smaller when the potentiometer is adjusted clockwise. How to eliminate the noise of automobile potentiometer? When the car potentiometer makes a lot of noise when adjusting and rotating, it is not damaged. Don't worry about replacing the potentiometer. How to eliminate the rotating noise of the potentiometer? Usually, the rotary noise of the potentiometer is caused by excessive dust or dirt and other sundries inside the potentiometer. The specific repair method is to first flow some special alcohol cleaning liquid onto the carbon film inside the potentiometer, and then continuously rotate the rotary handle, which can make the contact of the potentiometer slide on the carbon film, So as to achieve the purpose of cleaning carbon film and contact. Then listen to the noise level, and then turn the crank until the noise disappears. Precautions for use of automobile potentiometer 1. The potentiometers commonly used in car audio are mainly based on the selection of metal shaft handles, and the volume potentiometers generally use metal knobs or electrically plated rotating shafts, so in the adjustment of operating potentiometers, it is necessary to pay attention not to touch the exposed metal rotating shafts with your hands, because under normal circumstances, people's hands are in a certain static state. If you touch the metal rotating handles (shafts) of potentiometers, Static electricity can easily lead to pin discharge through the rotating handle and potentiometer pin. Thus, this electrostatic discharge phenomenon can easily lead to electric shock and other accidents. 2. During the use of the automobile potentiometer, the heat from its resistor body will cause the temperature rise of the potentiometer itself. Then heat must be dissipated by convection and conduction. If the car potentiometer is not installed properly, its heat dissipation will affect the potentiometer, resulting in excessive temperature and damage. Therefore, in order to ensure the safe use of the potentiometer, it is necessary to carefully consider the provision of ventilation and cooling conditions in the installation of the automobile potentiometer. 3. Also, pay attention to the moderation of the adjustment of the car potentiometer. The potentiometer is an adjustable electronic device. If the adjustment is frequent or the operation force is too large, it will easily damage the potentiometer shaft, causing the volume of the potentiometer to be turned off.