Description

The 16-Key Membrane Switch Keypad (4×4 Matrix) is a versatile input device commonly used in embedded systems and DIY electronics projects. It features 16 buttons arranged in 4 rows and 4 columns, enabling efficient input handling using a matrix scanning technique.

This keypad connects through an 8-pin interface (4 rows and 4 columns), reducing the number of microcontroller pins required while still allowing detection of all key presses.

Built with membrane switch technology, the keypad offers a soft-touch feel, quiet operation, and high durability with a long lifespan. Its compact and ultra-thin design makes it easy to integrate into control panels, enclosures, and portable devices.

The keypad includes a self-adhesive backing, allowing it to be easily mounted on various surfaces without additional hardware. It typically operates at low voltage (3.3V–5V logic levels) and supports a wide range of platforms including Arduino, Raspberry Pi, and other microcontrollers.

Thanks to its simple interface and reliable performance, this keypad is widely used in applications such as password entry systems, calculators, access control panels, home automation, and menu navigation interfaces.

Whether you are building a user interface for a project or adding input controls to a system, the 4×4 membrane keypad provides an affordable, durable, and easy-to-use solution.