KY-040 Rotary Encoder Sensor Module with Push Button – Incremental 360-Degree Rotary Encoder for Arduino & Raspberry Pi in Pakistan

Overview

When building interactive microcontroller interfaces, digital menu navigation systems, robotic speed controls, or adjustable power supplies, standard potentiometers only offer limited rotation angles and cannot track continuous spinning. The KY-040 Rotary Encoder Module with Push Button provides a versatile digital input solution, engineered to measure continuous 360-degree shaft rotation with quadrature output pulses alongside an integrated tactile switch.

Key Features

• Continuous 360-Degree Rotation: Incremental encoder design allows infinite rotation in both clockwise and counter-clockwise directions without hard stops.

• Integrated Push Button Switch: Features a built-in tactile switch activated by pressing down on the knob shaft, ideal for “select” or “enter” commands.

• Quadrature Output Signal: Outputs Phase A and Phase B digital square waves to accurately track both rotational speed and direction.

• Breakout Board Convenience: Comes mounted on a clean PCB with onboard pull-up resistors and standard 0.1-inch header pins for effortless breadboard wiring.

• Microcontroller Friendly: Easily integrates with Arduino, ESP32, STM32, and Raspberry Pi using standard interrupt or polling libraries.

Technical Specifications

Common Applications

• DIY Digital Instruments & Test Gear: Acts as a tuning or parameter-adjustment knob for custom bench power supplies and frequency generators.

• User Interface Panels: Enables scrolling through LCD/OLED menu selections and confirming choices with the integrated push button.

Note to customers: Adding small ceramic capacitors or software debouncing to the CLK and DT pins helps eliminate signal jitter in noisy electrical environments!