KY-040 Rotary Encoder Module 

This project is a custom-designed breakout module for the KY-040 incremental rotary encoder, developed to provide a compact, reliable, and easy-to-integrate solution for embedded systems and microcontroller projects.

The PCB is optimized for clean signal routing and straightforward assembly, exposing the encoder's quadrature outputs (CLK and DT), integrated push-button (SW), power, and ground through clearly labeled header pins. The module is compatible with popular development boards such as ESP32, Arduino, STM32, and Raspberry Pi Pico, making it suitable for user interfaces, menu navigation, parameter adjustment, robotics, CNC controllers, IoT devices, and other embedded applications.

Designed with a focus on reliability and ease of use, the PCB simplifies wiring while maintaining stable signal integrity for accurate rotary input detection. Its compact form factor makes it ideal for both prototyping and production-ready hardware designs.

Features

• Custom PCB designed for the KY-040 rotary encoder

• Compact and space-efficient layout

• Clearly labeled I/O connections

• Supports quadrature encoder outputs (CLK and DT)

• Integrated push-button (SW) support

• Compatible with 3.3 V and 5 V microcontroller systems

• Easy integration with ESP32, Arduino, STM32, Raspberry Pi Pico, and similar platforms

• Suitable for embedded control interfaces, industrial automation, robotics, CNC systems, and DIY electronics projects

This custom module provides a dependable and convenient interface for applications requiring precise rotary input and user interaction.