Potentiometer connection

Photocoupler

This article mainly introduces the connection of the potentiometer. The potentiometer is actually a kind of variable resistor . The connection of the potentiometer is similar to the connection of the sliding rheostat. Let me briefly introduce the addition of the potentiometer. What?

1. Potentiometer connection - introduction

The potentiometer is a kind of variable resistor , and has three terminals, and the resistance value can be adjusted according to a certain variation rule. Potentiometers usually consist of a resistor and a movable brush. When the brush moves along the resistor body, a resistance value or voltage which is in a certain relationship with the displacement amount is obtained at the output end. According to the structure between the potentiometer and the resistor body and whether there is a Switch, the potentiometer can be divided into a wire wound, a synthetic carbon film, a metallic glass glaze, an organic solid core and a conductive plastic.

The unit of the potentiometer resistance is the same as the resistor, and the basic unit is also ohm, which is represented by the symbol Ω. The potentiometer is represented by the letter R or RP (the old standard is W) in the circuit, and its circuit graphic symbol is as shown below:

2. Potentiometer connection - main features

The structural characteristics of the potentiometer - the resistor body of the potentiometer has two fixed ends. By manually adjusting the rotating shaft or the sliding handle, changing the position of the moving contact on the resistor body changes the moving contact between any fixed end and the fixed end. The resistance value, which changes the magnitude of the voltage and current.

3. Potentiometer connection - function

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. At this time, an output voltage which is related to the potentiometer applied voltage and the movable arm angle or stroke can be obtained at the output end of the potentiometer.

2) Used as a varistor

When the potentiometer is used as a varistor, it should be connected to the two ends of the device, so that a smooth and continuously changing resistance value can be obtained within the stroke range of the potentiometer.

3) Used as current controller

When the potentiometer is used as a current controller, one of the selected current outputs must be the sliding contact terminal.

4. Potentiometer connection

The general potentiometer, the middle is the moving piece, so when measuring the resistance, the pin 3 is the total resistance, the moving piece will not change the moving value, and the resistance will increase from the clockwise direction (moving the piece) , 2, 3 is the opposite.

The 6 feet are called double potentiometers, which means that 2 single units are together.

The 8 feet should be equipped with a switch, which is generally used in car audio.

Circuit diagram of the potentiometer:

The physical connection diagram of the potentiometer:

Potentiometer connection is written here, pro, do you understand? The following is an article related to Xiaobian for you. Interested to see it, I have benefited a lot~~~

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