What is A Potentiometer?
It's similar to a resistor. While the resistance of a resistor remains constant, the resistance of a potentiometer?can be changed by turning its shaft.
It has three pins and the schematic symbol is as follows:
A strip of resistive material is sandwiched between the potentiometer's two side pins. Consider carbon. This material is resistant.
The middle pin is referred to as the wiper. It is connected somewhere between the two ends of the strip.
By turning the shaft of the potentiometer, you can move the point where the wiper connects to the carbon strip.
The resistance between the middle and left pins decreases as the wiper is moved to the left. And the resistance between the middle and right pins grows.
When you move the wiper to the right, the opposite happens.
When purchasing a potentiometer, you must select a value. For instance, 100,000. The resistance between the two end pins is represented by this value. It also has the highest resistance value you can get from it.