Working principle and adjustment method of potentiometer with switch2021

As the name suggests, a potentiometer with a switch function is a potentiometer product with a switch function. It has more switching function pins than ordinary potentiometers. This article will introduce you to the working principle of the switch potentiometer, the application field of the switch potentiometer, and the switch potential. Adjustment method.

Working principle of potentiometer with switch

The resistor body with switch potentiometer has two fixed ends. By manually adjusting the shaft or sliding handle, changing the position of the moving contact on the resistor body will change the resistance value between the moving contact and any fixed end. Change the magnitude of voltage and current.

Potentiometer with switch is an adjustable electronic component. It is composed of a resistor body and a rotating or sliding system. When a voltage is applied between the two fixed electric shocks of the resistor body, the position of the contact on the resistor body can be changed by rotating or sliding the system, and a corresponding position of the movable contact can be obtained between the movable contact and the fixed contact. A certain relationship of voltage. It is mostly used as a voltage divider, at this time the potentiometer with switch is a four-terminal element. The potentiometer with switch is basically a sliding rheostat. There are several styles. It is generally used in the volume switch of the speaker and the power of the laser head.

Application field of potentiometer with switch

Variable resistor used for voltage division. On the bare resistor body, one or two movable metal contacts are pressed tightly. The position of the contact determines the resistance between either end of the resistor and the contact. According to the material, wire winding, carbon film, solid core type with switch potentiometer; according to the relationship between the output and input voltage ratio and the rotation angle, it can be divided into linear type with switch potentiometer (in a linear relationship), function with switch potentiometer (in a curve relationship) ). The main parameters are resistance, tolerance, and rated power. It is widely used in electronic equipment for volume control in speakers and receivers.

Adjustment method with switch potentiometer

The adjustment method with switch potentiometer generally has positive and negative symmetrical power in the circuit of the device. First, when the center contact C of the potentiometer slides to the potentiometer A terminal, the OUT output voltage to ground is +12V, on the contrary, when the potentiometer When the center contact C slides to the potentiometer B end, the OUT output voltage to ground is -12V. At this time, the output terminal C of the potentiometer can be adjusted within the range of 0-∞V. Therefore, when the center contact C of the potentiometer slides to the potentiometer B, the volume is the smallest. Moreover, when the center contact C of the potentiometer slides to the potentiometer A, the volume is the largest. Finally, for the potentiometer's point c to When B, it will lead to poor contact and other phenomena, which will cause the potentiometer to adjust the volume and so on.