4*4 Membrane Switch Matrix Keypad

The 4*4 Membrane Switch Matrix Keypad is a thin, flexible keypad with 16 keys arranged in 4 rows and 4 columns: the digits 0–9, the letters A–D, and the * and # keys. The keys are wired as a matrix, so all 16 buttons are read with only 8 pins. It is a popular input device for Arduino password locks, menus and calculators.

4*4 Membrane Switch Matrix Keypad Specifications

• Keys: 16 (0–9, A, B, C, D, * and #)
• Layout: 4 × 4 matrix, 4 rows and 4 columns
• Connector: 8 pins at 2.54 mm pitch on a flat ribbon cable
• Construction: thin membrane switches
• Interface: rows and columns scanned by a microcontroller

4*4 Membrane Switch Matrix Keypad Applications

• Door locks and password entry systems
• Menus and settings input for Arduino and ESP32 projects
• Calculators and number entry
• Access control and alarm system prototypes
• Robotics and STEM classes

What's in the Box

• 1 × 4×4 membrane matrix keypad

Tip: Use the Keypad library in the Arduino IDE and connect the 8 pins to 8 digital pins, usually 4 row pins followed by 4 column pins. Male-to-male jumper wires plug straight into the connector for breadboard or Arduino header wiring.

Orders placed before 14:00 are ready for pickup the same day. Delivery across Lebanon usually takes 1–3 working days.