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Pricelist: Retail Price (B2C) Pricelist
Pricelist: Retail Price (B2C) Pricelist
KY-040 360 Degree Rotary Encoder Module with Push Button

KY-040 360 Degree Rotary Encoder Module with Push Button

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SpecificationDetails
Operating Voltage3.3V to 5V DC
Pulses Per Rotation20 Pulses
Rotation Angle360° Continuous (No Stop)
InterfaceDigital (CLK, DT, SW)
Mechanical Life30,000 Cycles (Rotation)
Switch TypeIntegrated Momentary Push Button
Dimensions32mm x 19mm x 30mm
Price
₹ 59.32 ₹ 59.32
(Tax included)

Product Description

The M274 Rotary Encoder Brick is designed for high-precision user input. As the shaft is turned, it generates two square-wave signals (Output A and Output B) that are 90 degrees out of phase. By tracking which signal leads the other, a microcontroller can determine both the direction of rotation (clockwise vs. counter-clockwise) and the distance traveled. The module includes onboard pull-up resistors for the CLK, DT, and SW pins, allowing for a direct "plug-and-play" connection to Arduino, ESP32, or Raspberry Pi.

Key Features

  • Infinite Rotation: No physical start or end point, perfect for infinitely scrolling menus.

  • Tactile Feedback: Features a subtle "detent" or click feel for every pulse, providing a high-quality user experience.

  • Built-in Reset/Select: The integrated push-button eliminates the need for extra "Enter" or "Back" buttons on your control panel.

  • Digital Accuracy: Unlike potentiometers, encoders do not suffer from "analog noise" or wear out as quickly, ensuring consistent values over time.

  • Breadboard Friendly: Standard 2.54mm pitch headers allow for easy prototyping on breadboards or with female-to-male jumper wires.

Technical Details

  • Output Channels: 2-phase quadrature output (90° phase shift).

  • Shaft Type: D-shape or Knurled (Standard 6mm).

  • Logic Compatibility: Works seamlessly with 3.3V and 5V logic systems.

Prototyping and Engineering Tips from Robogears

  • Software Debouncing: Mechanical encoders produce "contact bounce" (noisy electrical signals) when rotated. To prevent a single click from being registered as multiple rotations, use a software debounce library or a small 0.1uF capacitor between the CLK/DT pins and Ground.

  • Interrupt-Driven Code: For the smoothest response, use Hardware Interrupts on your microcontroller (e.g., attachInterrupt() on Arduino). This ensures the MCU never misses a pulse, even if it is busy performing other tasks like updating a display.

  • The "Push" Function: The SW (Switch) pin is typically active-low. When the shaft is pressed, the pin connects to Ground. Ensure you enable the internal INPUT_PULLUP on your microcontroller pin to keep the signal stable when the button is not pressed.

  • Knob Selection: To improve the ergonomics of your project, pair this module with a fluted aluminum or plastic knob. Standard 6mm "Potentiometer Knobs" fit perfectly on this encoder's shaft.

Package Includes

  • 1 x M274 360 Degree Rotary Encoder Brick Sensor Module

Disclaimer

Do not apply excessive lateral force to the shaft, as this can damage the internal mechanical contacts. Ensure the input voltage does not exceed 5V to protect the pull-up circuitry.