Specification for the use of automotive potentiometers

Car potentiometers generally include car audio potentiometers, car air conditioner potentiometers, and car navigation potentiometers. Potentiometers can be used for tuning, temperature adjustment and function selection. This article introduces the wiring method of the car potentiometer, how to eliminate the noise of the car potentiometer? Precautions for the use of the car potentiometer, to help you understand the car potentiometer more deeply.

Wiring method of automobile potentiometer

When the car potentiometer is installed in the circuit, it must ensure the correct wiring connection of the three pins. Generally, in the volume control circuit, the 1 pin of the potentiometer should be connected to the signal ground wire, and the 2 pin is connected to the signal output wire. Pin 3 is the input line for borrowing number. But it should be noted that if the wiring at both ends of pin 1 and pin 3 is reversed, it will cause the potentiometer to adjust clockwise, causing the volume to become smaller and smaller.

How to eliminate noise from automotive potentiometers?

When the car potentiometer emits a lot of noise when adjusting the rotation, this situation is not damaged. Don't worry about replacing the potentiometer. So how to eliminate the problem of rotating noise of the potentiometer? Normally, the rotating noise of the potentiometer is normal. The reason is that there may be excessive dust or dirt inside the potentiometer that causes the potentiometer to cause poor contact and turn to produce noise. The specific repair method is to first flow some special alcohol cleaning fluid to the carbon inside the potentiometer. On the membrane, the rotary handle must be continuously rotated at this time, which is mainly to make the contact of the potentiometer slide on the carbon membrane, so as to achieve the purpose of cleaning the carbon membrane and the contact. Then listen to the noise level, then turn the knob and wait until the noise disappears.

Precautions for using automotive potentiometers

1. The potentiometers usually used on car audio are mainly based on the selected metal shaft, and the general volume potentiometer uses metal knobs or electroplated rotating shafts, so you must pay attention to the adjustment of the operating potentiometer. Do not touch the bare metal shaft with your hands, because under normal circumstances, human hands have a certain static state. If they touch the metal rotating handle (shaft) of the potentiometer, static electricity can easily pass through the rotating handle. The pin with the potentiometer causes the pin to discharge. Therefore, this kind of electrostatic discharge can easily lead to accidents such as electric shock.

2. Regarding the use of automotive potentiometers, the heat emitted from the resistor body will cause the temperature rise of the potentiometer itself. Then heat dissipation must be carried out by means of convection, conduction, etc. So if the car potentiometer is not installed properly, its heat dissipation will affect the potentiometer and cause the temperature to be too high and cause damage. Therefore, in the installation of car potentiometers, careful consideration should be given to providing ventilation and cooling conditions to ensure that the potentiometer can be used safely.

3. Also pay attention to the appropriate adjustment in the adjustment operation of the car potentiometer. The potentiometer is an adjustable electronic device. If the adjustment is frequent or the operating force is too large, it will easily cause damage to the potentiometer shaft. The volume cannot be turned off when the potentiometer is used.