Rotary potentiometer is actually a kind of variable resistor. Because of the change of voltage potential or electromotive force when it works, it can obtain a certain proportion of voltage or resistance at the output end to the input end, so it is called potentiometer.

The precision rotary potentiometer is mainly composed of contact brush, carbon diaphragm, rotating shaft, lead-out terminal, sleeve, shell and other parts. Contact brush and carbon diaphragm are the most important two parts. Contact brush plays the role of electric transmission, while carbon diaphragm brings the characteristics of resistance change, which directly determines the rotating potential. Use effect and service life of the device.

The main function of precision rotary potentiometer is to adjust voltage and limit current. The effect is to adjust the volume, speed, temperature, brightness, contrast and frequency. Its main use is similar to that of rotary encoder. That is to say, rotary potentiometer can be used in any equipment that needs to adjust parameters by rotation.

How to connect the rotary potentiometer?

Generally, the rotary potentiometer has three feet, the resistance of 0 feet counts one foot, the middle two feet, and the last three feet. Two of them are used to connect the output of the 1,3 foot is the total resistance of the potentiometer, two foot is sliding above, adjust the size of resistance to control the voltage.

Notes for Installation of Rotary Potentiometer

When installing the fixed nut of the rotary encoder potentiometer, the strength should not be too tight to avoid destroying the screw teeth or poor rotation; when installing the "iron shell direct sliding" potentiometer, avoid using too long screw, otherwise it may hinder the movement of the sliding handle, or even directly damage the potentiometer itself. In the process of putting the knob on the potentiometer, the thrust should not be too large, otherwise it may cause damage to the potentiometer.

Rotary potentiometers, as semi-finished products of electronic components, are widely used in various industries. Common rotary potentiometers include carbon film potentiometers, welding wire terminal potentiometers, synthetic carbon film potentiometers, conductive plastic potentiometers, etc., which belong to resistance potentiometers.

The working principle of precision rotary potentiometer is mechanical contact between contact brush and resistor.

The rotary encoder potentiometer are widely used in many fields, such as instruments, communication equipment, household appliances, on-board power amplifiers, radios, loudspeakers, etc. They are also used in circular pinless sheet potentiometers because of their light weight, small size, wide range of adjustable resistance and strong stability.

Matters needing attention in selecting rotating shaft of rotary encoder potentiometer

The resistance of the fine-tuning potentiometer can be adjusted as well as the resistance of the rotary potentiometer, but the resistance of the fine-tuning potentiometer is fixed without constant adjustment. Rotary axis is the component of rotating potentiometer, which is easy to adjust the resistance of potentiometer. When choosing the rotating shaft, the dimension accuracy and smoothness of the rotating shaft are required to ensure good handle, low noise and certain mechanical strength.