4x4 Matrix Keypad – 16-Key

The 4x4 matrix keypad is a compact and flexible input device featuring 16 tactile keys arranged in a 4-row by 4-column grid. It’s perfect for adding numeric or alphanumeric input to microcontroller-based systems such as password-protected locks, menu-driven interfaces, calculators, and automation panels.

With a simple pinout and easy integration via libraries, this keypad works seamlessly with Arduino, ESP32, STM32, and Raspberry Pi. Its adhesive backing and flexible membrane design make it ideal for both prototyping and permanent installations.