4×4 Matrix 16-Key Membrane Keyboard Keypad

The 4×4 Matrix 16-Key Membrane Keyboard Keypad is a compact and reliable input device designed for user interaction in electronic and embedded system projects. It features 16 tactile keys arranged in a 4-row × 4-column matrix, allowing users to enter numbers, letters, symbols, and control commands efficiently. Its thin membrane construction, lightweight design, and adhesive backing make it easy to integrate into a wide range of DIY, educational, and industrial applications.

The keypad operates using a matrix scanning principle, where the 16 keys are organized into four rows and four columns. When a key is pressed, it connects a specific row and column, allowing a microcontroller to identify the pressed key by scanning the matrix. This method minimizes the number of GPIO pins required, making it ideal for microcontroller-based systems.

Constructed with a durable flexible membrane, the keypad provides a comfortable tactile response and long operational life. The rear adhesive layer enables secure mounting on panels, enclosures, or project boxes without additional hardware. The module is supplied with an 8-pin ribbon cable, allowing quick and convenient connection to development boards and custom circuits.

The 4×4 Matrix 16-Key Membrane Keyboard Keypad operates with standard digital input signals and is fully compatible with Arduino, ESP32, ESP8266, Raspberry Pi (via GPIO), STM32, PIC, AVR, 8051, NodeMCU, and other microcontroller platforms. It is commonly used in password entry systems, electronic locks, access control, calculators, menu navigation, home automation, industrial control panels, robotics, and embedded system projects.

Features

• 16 tactile keys arranged in a 4×4 matrix

• Thin and flexible membrane construction

• Matrix scanning interface with 8-pin connection

• Low GPIO pin requirement

• Durable and reliable key operation

• Comfortable tactile feedback

• Self-adhesive backing for easy mounting

• Compact and lightweight design

• Low power consumption

• Easy interfacing with microcontrollers

• Long operational life

Applications

• Password entry systems

• Electronic door locks

• Access control systems

• Security keypads

• Calculator projects

• Menu navigation interfaces

• Home automation systems

• Robotics and automation

• Arduino and ESP32 projects

• Raspberry Pi embedded systems

• Industrial control panels

• Educational STEM projects

• Laboratory experiments

• DIY electronics and prototype development

Package Includes

• 1 × 4×4 Matrix 16-Key Membrane Keyboard Keypad