4x4 Matrix Keypad Module – 16-Key Membrane Switch for Arduino and Embedded Projects
The 4x4 Matrix Keypad Module is a flexible and easy-to-use input device featuring 16 tactile keys arranged in a 4-row by 4-column layout. It’s perfect for password entry, menu navigation, and numeric input in embedded systems and Arduino projects. This keypad uses a simple matrix wiring design, minimizing the number of I/O pins required.
 
Key Features:
16-Key Layout
Includes 0–9 digits, A–D, *, and # for full alphanumeric and control input.
Flexible Membrane Design
Thin, lightweight, and easy to mount on flat surfaces or enclosures.
4×4 Matrix Configuration
Uses only 8 digital I/O pins (4 rows + 4 columns) for input scanning.
Adhesive Backing
Peel-and-stick layer for secure attachment to your project enclosure or panel.
Highly Compatible
Works with Arduino, ESP32, STM32, Raspberry Pi, and other microcontrollers.
 
Applications:
Keypad entry systems
Security panels and password locks
Menu navigation interfaces
Embedded human-machine interfaces
DIY electronics and automation projects
 
Package Includes:
1 × 4x4 Matrix Keypad Module (membrane type)
 
Specifications:
Key Layout: 4 rows × 4 columns (16 keys total)
Connection Type: 8-pin flexible flat cable
Key Characters: 0–9, A–D, *, #
Operating Voltage: 3.3V – 5V
Compatible With: Arduino, STM32, Raspberry Pi, ESP32
 
Dimensions:
Length: 70 mm
Width: 77 mm
Cable Length: 85 mm
 
Weight: 8 g
 
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