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Description of Types and Structural Characteristics of Adjustable Resistors

Time：2023-07-26

Adjustable resistors are generally composed of a resistor body and a rolling or sliding system. Its operating principle and potentiometer operating principle are roughly the same. When a voltage is applied between the two fixed electric contacts of the resistor body, the orientation of the contact on the resistor body is changed by rolling or sliding system, and a voltage that is necessarily related to the position of the moving contact can be obtained between the moving contact and the fixed contact. However, the current adjustable resistor for the specification of the type of product distinction is very numerous, so do you know anything about these specifications of the product. Description of

adjustable resistor types: the letter specification of

conventional general resistor prefix indicates products with different specifications and types:

(1) letter "c": solid

(2) letter "s": oxide film

(3) letter "w": cement

(4) letter "t": special (fuse)

(5) letter "RJ": metal film

(6) letter "RJ": metal oxide film

adjustable resistor structure characteristic analysis:

. adjustable resistor is usually a thin and long cylindrical shape with a length of about 1cm and a diameter of about 0.3cm. the volume size of the resistor is also different, the larger the volume, the greater the power of the adjustable resistor, the volume of the metal film resistor is smaller than the volume of the carbon film adjustable resistor at the same power.

2. The adjustable resistor has only two pins, and the two pins are not divided into positive and negative polarities. The two pins of the common adjustable resistor extend in the direction of the smoke axis and can be bent for installation on the circuit board.

3. Now more color ring adjustable resistors are used, and there will be four color rings on the resistors (there are 3 and 5 others). These color rings are used to indicate the resistance value and error level of the adjustable resistors. For non-color ring adjustable resistors, parameters such as resistance value will be directly marked on the resistor.

About the working principle of the adjustable resistor

The adjustable resistor is composed of a resistor body and a rolling or sliding system. Its operating principle with the potentiometer operating principle is somewhat similar. When a voltage is applied between the two fixed electric contacts of the resistor body, the orientation of the contact on the resistor body is changed by rolling or sliding system, and a voltage that is necessarily related to the position of the moving contact can be obtained between the moving contact and the fixed contact. On the exposed resistor body, one or two movable metal contacts are pressed tightly. Contact orientation determines the resistance between either end of the resistor and the contact. According to the data, it can be divided into carbon film, wire wound and solid core adjustable resistors. According to the relationship between input and output voltage ratio and rotating viewpoint, it can be divided into linear adjustable resistors and function potentiometers. Therefore, adjustable resistors are widely used in electronic equipment as volume control in receivers and acoustics.

Keywords： Description of Types and Structural Characteristics of Adjustable Resistors