4×4 Membrane Switch Matrix Keypad – 16-Key Tactile Keyboard

The 4×4 Membrane Matrix Keypad is a compact and reliable 16-button keypad designed for microcontroller-based projects such as Arduino, Raspberry Pi, and other embedded systems. Its thin, flexible design with self-adhesive backing makes it easy to mount on flat surfaces or inside project enclosures.

Each of the 16 keys (0–9, A–D, *, #) is connected in a matrix arrangement, minimizing I/O pin usage while offering responsive tactile feedback. This keypad is ideal for applications requiring numeric or alphanumeric input in a space-saving and cost-effective form factor.

Technical Specifications

• Keypad Layout: 4 Rows × 4 Columns (Matrix)

• Total Keys: 16 (0–9, A–D, *, #)

• Operating Voltage: 3.3V to 5V

• Connector Type: 8-pin header (2.54mm pitch)

• Dimensions: 70mm × 77mm (approx.)

• Cable Length: ~85mm

• Material: PET (polyester film) with conductive ink

• Mounting: Self-adhesive backing

• Key Type: Tactile membrane switch

Package Includes

• 1 × 4×4 Matrix Membrane Switch Keypad

Applications

• Arduino and Raspberry Pi input interfaces

• Password entry systems

• DIY security keypads

• Access control and authentication

• Menu navigation in embedded systems

• Custom control panels and electronics projects