4x4 Matrix 16 Keypad Keyboard Module 16 Button MCU for Arduino Quick summary A compact 4x4 matrix keypad module with 16 tactile buttons, built for microcontroller projects. Provides a simple, reliable way to add numeric and command input to Arduino and other MCU based systems. Key benefits Simple user input: Adds a familiar keypad interface for PIN entry, menu navigation, and data entry without complex wiring. Easy integration: Designed for microcontroller projects including Arduino. Works with standard keypad scanning libraries and common GPIO arrangements. Space efficient: Compact module fits on breadboards and inside enclosures where a full keyboard would be impractical. Durable and responsive: Tactile buttons deliver reliable presses for regular use in prototyping and finished projects. Clear layout: 4x4 matrix arrangement covers numbers and extra function keys in a compact footprint. What it does and how it helps Provides 16 distinct keys arranged in a 4 by 4 matrix to capture user input for commands, passwords, or numeric entry. Lets developers implement secure input, menu control, or direct numeric control without dedicating many microcontroller pins to individual switches. Streamlines project interaction by offering immediate tactile feedback and a standard key arrangement familiar to users. Compatibility and function Compatible with Arduino and most other microcontrollers when used with standard keypad scanning code. Acts as a matrix keypad module for MCU projects, requiring typical GPIO scanning or library support for key detection. Works well in both prototype and finished product configurations where direct physical input is needed. Material, size, and performance Compact PCB module with tactile keys suitable for breadboard and enclosure mounting. Designed for consistent and repeatable key actuation for reliable performance in daily use. Durable construction intended for repeated presses during development and deployment. Practical applications and use scenarios Security panel or door lock prototype: Capture PIN codes for access control in a DIY security system. Menu control for embedded devices: Navigate settings and enter values on hobbyist instruments, clocks, or automation controllers. Input interface for robotic and IoT projects: Provide a simple control panel for mode selection, command entry, or calibration steps. Why choose this module Straightforward integration into MCU projects, especially Arduino based builds. Compact and reliable way to add versatile input without redesigning hardware. Familiar keypad layout that makes devices easier to use and test. Note Requires standard keypad scanning or library support on the microcontroller to detect individual key presses.