4×4 Matrix Keypad Module for Arduino & Raspberry Pi | 16-Button Input Keyboard

The 4×4 Matrix Keypad Module for Arduino & Raspberry Pi | 16-Button Input Keyboard provides a simple and reliable interface for user input. It features 16 tactile buttons arranged in a matrix format, requiring only 8 microcontroller pins for operation.

Key Features

• 16 push buttons in 4×4 matrix layout
• Tactile feedback with audible click
• Matrix wiring saves microcontroller pins (8 vs 16)
• Durable membrane construction for long life
• Easy to interface with any microcontroller
• Standard 0-9, A-D, *, # layout
• Sticky backing for panel mounting

Technical Specifications

Applications

• Password entry systems and security panels
• Menu navigation on LCD displays
• Calculator projects
• Remote control input panels
• Data entry terminals
• Access control keypads

Important Notes

• Use Keypad library by Mark Stanley for Arduino
• Connect rows to outputs and columns to inputs (or vice versa)
• Enable internal pull-ups on input pins for reliable reading
• Debounce in software or use Keypad library built-in debounce
• Can share row/column pins with other devices if careful