KY004 Key Switch Module - Functionality you can rely on: provides a convenient input interface for key switches, enabling detection of key presses and releases for your projects. - Broad compatibility: designed for Arduino, AVR, and PIC. Works with UNO and MEGA2560 boards, and can be easily integrated into breadboard circuits for quick prototyping and testing. - Easy to use and program: simple wiring and straightforward integration with Arduino sketches or PIC programs, allowing you to add key input with minimal code. - Clear value for hobbyists and developers: adds user input capability, reduces wiring complexity, and supports interactive controls in prototypes and final builds. - Practical use scenarios: - Create a small menu navigated by a single key in an LCD or OLED display project. - Collect user input or confirmation in a compact device during testing or demos. - Add a simple input option for educational projects or hardware debugging sessions.