A pot is a manually adjustable variable resistor with three terminals. In the figure below you can see some examples of potentiometers. In a circuit diagram, a potentiometer is represented by one of the two symbols below:. A potentiometer has 3 pins.
A potentiometer, or "pot" for short, is also known as a variable resistor. Variable resistors are used to dynamically change the resistance to control the current in a circuit, and may also be used as a voltage divider. For example, they are used to control the volume in a radio.
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