Potentiometer Symbol and Pinout Diagram(Trim, Rotary)

Potentiometer is a three-leg device with a sliding or rotating contact used to create variable resistance or voltage. The potentiometer symbol comprises a resistor symbol with an arrow in the middle. Whereas its pinout may vary depending on the potentiometer type you have(linear, rotary, or digital).

Potentiometer Symbol

There are two ways to represent a potentiometer using symbols i.e, American Standard and International Standard. Though the International Standard potentiometer symbol is new, the American Standard one is still used in many books.

Types of Screwdrivers and Their Use...
Types of Screwdrivers and Their Uses (PDF)

Potentiometer symbol(American Standard)

The potentiometer symbol in American Standard is denoted by a zigzag line(resistor symbol) with an arrow above it.

Potentiometer symbol
Potentiometer symbol

Potentiometer symbol(International Standard)

As per the International standard, the symbol of a potentiometer is a rectangular box with two terminals on either side and an arrow in the middle.

Potentiometer Pinout Diagram

The pinout of the potentiometer varies according to the type of potentiometer like sliding, rotating, or trim.

Potentiometer Pinout
Potentiometer Pinout

Single-turn potentiometer Pinout

Single turn potentiometer pinout
Single turn potentiometer pinout

This is one of the most widely used rotary potentiometers. The single-turn pot can be rotated at its knob in a single direction.

Trimpot Pinout

Trim potentiometer pinout
Trim potentiometer pinout

These pots are fixed in the circuit to make adjustments in the supply voltage. The resistive track in these pots is made of cement or carbon composition. The rotary wiper adjustments can be done with a small-bladed screwdriver.

Multi-turn Trimpot Pinout

Multiturn Trim potentiometer pinout
Multiturn Trim potentiometer pinout

The major difference between a multi-turn pot and a single-turn pot is that multiple rotations are possible in this model. This results in an enhanced precision as compared to the other type

Skeleton Trimpot Pinout

Skeleton Trim potentiometer pinout
Skeleton Trim potentiometer pinout

As the name suggests, this type of trimpot does not have any outer casing. The resistance can be varied using a screwdriver.

Dual Gang potentiometer Pinout

Dual gang potentiometer pinout
Dual gang potentiometer pinout

Dual-gang potentiometer consists of two single-turn potentiometers combined on a single shaft. These pots use two parallel channels to achieve dual functionality. 

Servo potentiometer Pinout

Servo potentiometer pinout
Servo potentiometer pinout

As its name specifies, servo potentiometers are used in servo motors. These pots automatically adjust the supply voltage fed to them. A servo pot is shown in the figure below.

Sliding potentiometer Pinout

Sliding potentiometer pinout
Sliding potentiometer pinout

Usually called faders, these potentiometers are a type of linear sliders that are made from conductive plastic.

Leave a Comment