Introduction to several commonly used potentiometers

The potentiometer is a commonly used electronic component. The volume of the potentiometer is much larger than that of the variable resistor. The shape of the potentiometer is different, and the specific characteristics of the various potentiometers are different. Today I will give you a brief introduction to the appearance and characteristics of several common potentiometers.

1. Rotary single potentiometer: This is a round-shaped potentiometer. It has a metal handle. The length of this handle varies among different potentiometers. Some are quite long, and some are quite short. The handle can be rotated within a certain angle from left to right. But it cannot rotate 360 ​​degrees. This kind of potentiometer usually has 3 pins, and some have 4 report pins. The 4th follow pin is the pin (ground pin) connected to the shell. It is used as a ground wire in the circuit to eliminate the human body when adjusting the potentiometer. Come on.

2. Direct sliding single potentiometer: This is a rectangular potentiometer. It has a vertical upward handle, this handle can only slide in a straight line but cannot rotate, and its pin piece is at the bottom.

3. Rotary double potentiometer: It is similar to the rotary single potentiometer, but it has two single potentiometers, each of which has the same characteristics. A rotary handle is used to control the organization and adjustment of two single potentiometers. Each single potentiometer has 3 pins.

4. Direct sliding double potentiometer: It is similar to the direct sliding single potentiometer. It consists of two single potentiometers. A rotary handle is used to control the organization and adjustment of the two single potentiometers. Each connected potentiometer has 3 pins.

5. Direct sliding SMD potentiometer: The direct sliding SMD potentiometer has no pins. Compared with ordinary potentiometers, it has a much smaller volume and is mainly used in some small electronic appliances.

6. Rotary SMD potentiometer: The rotary SMD potentiometer is the same as the ordinary rotary potentiometer, and the resistance value can be changed by rotating adjustment.

7. Wire-wound multi-turn potentiometer: The structure of this potentiometer is different from ordinary potentiometers. The power it can withstand is relatively large, and it can be greater than 360 readings when adjusting the resistance.

8. Precision potentiometer: The precision potentiometer has high adjustment accuracy and is commonly used in some precision circuits.

9. Small potentiometer with switch: It is often used to draw the controller. It is attached with a power switch. When the potentiometer just starts to rotate, first turn on the switch contact point in the potentiometer, and then turn on the potentiometer. Adjustment. There are also many types of potentiometers with switches, such as volume potentiometers in radios and switches in larger rotary potentiometers. There are two more potentiometer pins with switches than ordinary potentiometers, and these two pins are the contact pins of the power switch.