Description

The 16 Keys 4×4 Matrix Keyboard Module is a versatile input device widely used in electronics and embedded systems. It features 16 tactile buttons arranged in a 4×4 grid, allowing users to input numbers, letters, or commands efficiently.

This keypad operates using a matrix system of 4 rows and 4 columns, enabling all 16 keys to be read using only 8 microcontroller pins, which significantly reduces wiring complexity.

Built with membrane switch technology, the keypad offers a slim profile, quiet operation, and long lifespan. It is made from flexible, durable materials and often includes a self-adhesive backing for easy mounting on panels or enclosures.

The module typically supports 3.3V–5V logic levels, making it compatible with popular platforms such as Arduino, Raspberry Pi, ESP32, and other microcontrollers. It connects via an 8-pin ribbon cable, simplifying integration into various projects.

Common applications include:

• Password and security systems
• Calculator and menu interfaces
• Home automation control panels
• Industrial control systems
• DIY electronics and educational projects

Thanks to its compact design, ease of use, and cost-effectiveness, this keypad module is an essential component for adding user input functionality to a wide range of electronic systems.