KY-040 Rotary Encoder

KY-040 360° Rotary Encoder Module (With Pins – Control Input Sensor Board)

Add precise user input control to your electronics projects with the KY-040 Rotary Encoder Module. This 360-degree rotation sensor is ideal for menu navigation, position control, and interactive systems in Arduino and embedded applications.

Unlike simple potentiometers, this rotary encoder provides infinite rotation and digital pulse output, making it perfect for modern control interfaces.

Key Features:

360° continuous rotation (no end stops)
Digital pulse output for precise position detection
Built-in push-button switch (press function included)
Easy integration with Arduino, ESP8266, ESP32, STM32, and more
Stable performance with clear signal output
Includes header pins for breadboard or PCB mounting

Specifications:

Model: KY-040
Operating Voltage: 3.3V – 5V DC
Output Type: Digital A/B quadrature signals + push button
Encoder Type: Incremental rotary encoder
Pulses per Rotation: Typically 20 steps per cycle (varies slightly)
Interface: 5-pin (CLK, DT, SW, +, GND)
Mounting: PCB module with pin headers

Perfect For:

Menu navigation systems
Volume or parameter control interfaces
Robotics control panels
Arduino and IoT user interfaces
DIY electronics and HMI projects

Whether you're building a smart control panel or upgrading your project interface, the KY-040 rotary encoder provides smooth, accurate, and responsive input control.