4x3 Matrix Membrane Keypad 12 Keys (12-Button Matrix Keyboard Module)

The 4x3 Matrix Membrane Keypad is a compact and lightweight input device designed for numeric and function key input in embedded systems and electronic projects. It features 12 tactile membrane keys arranged in a 4-row × 3-column matrix, allowing efficient keypad scanning with minimal microcontroller I/O pins.

The keypad includes a flexible flat cable and self-adhesive backing for easy panel installation. It is compatible with Arduino, ESP32, ESP8266, STM32, Raspberry Pi, AVR, PIC, and other microcontroller platforms, making it ideal for password entry systems, security panels, vending machines, home automation, and DIY electronics projects.

Key Features -

• 4-row × 3-column matrix keypad layout

• 12 tactile membrane keys

• Compact and lightweight design

• Flexible flat cable connection

• Self-adhesive backing for easy mounting

• Durable membrane switch construction

• Low power operation

• Easy interface with microcontrollers

• Long operational life

• Ideal for embedded control applications

Specifications -

• Product type - Matrix Membrane Keypad

• Key configuration - 4 × 3 Matrix

• Number of keys - 12

• Interface type - Matrix Row and Column

• Contact type - Momentary Normally Open

• Operating voltage - 3.3V to 5V Logic Compatible

• Cable length - Approximately 8cm to 10cm

• Mounting type - Self-Adhesive Panel Mount

• Operating temperature - -20C to +60C

• Application - Numeric Input and Embedded Control Systems

Applications -

• Password entry systems

• Electronic door locks

• Security access panels

• Vending machines

• Industrial control panels

• Home automation systems

• Arduino and ESP32 projects

• Robotics control interfaces

• DIY electronics projects

• Embedded user input devices