Potentiometers are widely used in electronic products, but do you really understand the characteristics of potentiometers? Let us learn.

Resolution of the potentiometer The resolution of the potentiometer is also called the resolution. For the wire wound potentiometer, when the moving contact moves one circle, the output voltage changes discontinuously. The ratio of this change to the output voltage is resolution. The theoretical resolution of the linear wire wound potentiometer is the reciprocal of the total number of turns N of the winding, and it is expressed as a percentage. The more total turns the pot has, the higher the resolution.

The maximum working voltage of the potentiometer The maximum working voltage of the potentiometer refers to the maximum working voltage that the potentiometer can withstand under the specified conditions and can work reliably for a long time without damage, also known as the rated working voltage. The actual working voltage of the potentiometer should be less than the rated working voltage. If the actual working voltage is higher than the rated working voltage, the power that the potentiometer bears will exceed the rated power, which will cause the potentiometer to overheat and damage.

The dynamic noise of the potentiometer When the potentiometer is under the action of the applied voltage and its moving contact point slides on the resistor body, the electrical noise generated is called the dynamic noise of the potentiometer. Dynamic noise is one of the main parameters of sliding noise. The magnitude of the dynamic noise is related to the speed of the rotating shaft, the contact resistance between the contact point and the resistor body, the uneven change of the resistivity of the resistor body, the number of moving contact points and the magnitude of the applied voltage. related.