A push button rotary encoder module with a potentiometer knob is an electronic control device that combines a push button and a rotary encoder into a single module. It is often used to provide input to an electronic circuit or microcontroller.

The rotary encoder part of the module is a type of angular position sensor that is used to detect the rotation of a shaft or other moving part. It typically has two or more output signals that change state as the shaft is rotated, allowing the angle of rotation to be determined.

The push button part of the module is a type of switch that is activated by pressing down on it. It is often used to provide a momentary input to a circuit, such as to initiate a specific action or to enter a particular mode.

The potentiometer knob is a adjustable resistor that is used to set a specific resistance value. It is often used in conjunction with the rotary encoder to allow the user to set a specific parameter or value.

This type of module is often used in a wide range of electronic devices and systems, such as in control panels, audio equipment, and other applications where it is necessary to provide input or control to an electronic circuit.

A rotary encoder, also called a shaft encoder, is an electro-mechanical device that converts the angular position or motion of a shaft or axle to analog or digital output signals. There are two main types of rotary encoder: absolute and incremental.