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A potentiometer is likewise generally known as a potmeter or pot. The most widely recognized type of potmeter is the single turn revolving potmeter. This sort of pot is regularly utilized in sound volume control (logarithmic shape) just as numerous different applications. Various materials are utilized to build potentiometers, including carbon creation, cermet, wirewound, conductive plastic, or metal film. The resistive component can be viewed as two resistors in series(potentiometer opposition), where the wiper position decides the obstruction proportion of the main resistor to the subsequent resistor.

Potentiometer definition

A potentiometer is a physically customizable, variable resistor with three terminals. Two terminals are associated with a resistive component, the third terminal is associated with a flexible wiper. The situation of the wiper decides the yield voltage.

Kinds of potentiometers

A wide assortment of potmeters exists. Physically flexible potmeters can be partitioned in turning or direct development types. The tables underneath list the accessible sorts and their applications. Other than physically movable pots, likewise electronically controlled potentiometers exist, frequently called advanced potmeters.

Computerized potentiometers:
Computerized potentiometers will be potentiometers that are controlled electronically. As a rule, they exist of a variety of little resistive parts in arrangement. Each resistive component is outfitted with a switch that can fill in as the tap-off point or virtual wiper position. An advanced potmeter can be constrained by for instance up/down signs or conventions like I²C and SPI.

A potentiometer can likewise be wired as a rheostat or single variable obstruction. The most ideal approach to wire a potentiometer as a rheostat is to associate the wiper and one end terminal together, this forestalls unending obstruction if the wiper every so often loses contact. More data can be found on the devoted page about rheostats.


The potentiometer tighten is the connection between the mechanical position and opposition proportion. Straight shape and logarithmic(audio) tighten are the most widely recognized types of tighten. For more data visit the devoted page about potentiometer tighten.

Stamping codes:
Potentiometers esteem are frequently set apart with a lucid string demonstrating the absolute obstruction, for example, “100k” for a 100 kOhm potentiometer. Now and again a 3 digit coding framework like SMD resistor coding is utilized. In this framework, the main digits show the worth and the last digit demonstrates the multiplier. For instance, a 1 kOhm would be coded as 102, which means 10ω x 102 = 1 kω.

The shape of a potentiometer is typically shown with a letter. The accompanying table records the pre-owned coding for potentiometer tighten, various norms utilize similar letters which can be confounding. It is consistently a smart thought to twofold check the shape by estimation.


The goal of a potentiometer is the littlest conceivable change in opposition proportion. Wirewound resistors regularly have a lower goal on the grounds that the wire turns present discrete strides in opposition. Conductive plastic potmeters have the best goal. The goal can be affected by the wiper setup, a wiper comprising of a few spread contact focuses builds the potentiometer goal.


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