4x4 Keypad - 16 Key - Matrix Membrane Type
VAT inclusive; Computed calculations added locally.
Overview
4×4 Keypad – 16 Key Matrix Membrane Type
Add a compact and reliable user interface to your electronics projects with the 4×4 Keypad – 16 Key Matrix Membrane Type. Featuring 16 membrane buttons arranged in a 4-row × 4-column matrix, this keypad is designed for convenient numerical and command input while keeping wiring requirements low.
The matrix configuration allows all 16 keys to be monitored using just 8 signal lines—four rows and four columns. A compatible microcontroller can scan these lines to determine which key has been pressed, making the keypad an efficient choice for projects with limited GPIO resources.
Its thin and flexible membrane construction is well suited to compact embedded systems and prototypes. Connect it with an Arduino, ESP32, Raspberry Pi, or other compatible microcontroller to create password systems, digital locks, calculators, menu interfaces, automation controllers, robotics projects, and more.
Whether you're developing a student electronics project or a custom embedded system, this 16-key membrane keypad provides a straightforward and cost-effective physical input solution.
Customer Reviews
Share your verified purchase experience with the community.
Earn Loyalty Rewards
Get 50 Points for reviewing + bonus points when upvoted!
Want to share your experience?
Sign in to leave a verified review for this product.
New here? Create a free account
Verified Comments Listing
Product Technical Information
Technical Details
16-Key Membrane Matrix Keypad
The 4×4 Keypad – 16 Key Matrix Membrane Type provides 16 individual buttons in a convenient 4×4 matrix arrangement. It can be used as a physical input interface for microcontroller and embedded-system projects.
The membrane construction gives the keypad a slim profile, making it suitable for applications where a conventional mechanical keypad may take up more space.
Efficient 4×4 Matrix Design
The 16 keys are organized into four rows and four columns. Instead of requiring 16 individual GPIO pins, the controller can identify the pressed key using 8 signal connections.
The standard arrangement consists of:
- 4 row lines
- 4 column lines
- 8 total signal connections
A microcontroller scans the rows and columns to identify individual key presses.
Compatible with Popular Microcontrollers
The keypad can be integrated into projects using:
- Arduino Uno
- Arduino Nano
- Arduino Mega
- ESP32
- ESP8266
- Raspberry Pi
- STM32
- Other compatible development boards
It is a passive switch matrix, so the connected controller handles the scanning and interpretation of the keys.
Ideal for Password Entry
A 4×4 keypad is particularly useful for projects that require PIN or password input. It can be combined with a microcontroller and suitable actuator or display to create a basic access-control prototype.
Works with Displays
Pair the keypad with an LCD, OLED, TFT, or other display to create an interactive menu or data-entry system. Users can enter values, select options, navigate menus, or control connected devices.
Suitable Applications
The keypad can be used for:
- Digital door-lock prototypes
- Password and PIN systems
- Calculators
- Menu interfaces
- Home automation
- Robotics
- Control panels
- Vending-machine prototypes
- Security-system prototypes
- Data-entry systems
- Arduino projects
- ESP32 projects
- Raspberry Pi projects
- Educational electronics
- DIY embedded systems
Slim and Flexible Design
The membrane-style construction provides a lightweight and space-saving input solution. It can be mounted on or integrated into project enclosures where a thin keypad interface is preferred.
Important: This keypad is a passive matrix of switches and does not contain a microcontroller. A compatible controller or scanning circuit is required to interpret key presses.
Frequently Asked Questions
You May Also Like
12×12×7.3mm 4-Pin Tactile Push Button Switch – Yellow Cap, Momentary Self-Reset
In Stock
What Engineers & Builders Say
Trusted by makers, robotics researchers, and DIY electronics enthusiasts across Bangladesh.
"The ESP32 DIY Ambilight Kit arrived within 24 hours in perfect packaging. Everything worked out of the box with flawless code support!"
Tanvir Ahmed
Robotics Engineer
"KathalTech is my go-to store for sensors, NodeMCU boards, and microcontrollers in Bangladesh. Highly reliable service and genuine components."
Nusrat Jahan
IoT Researcher
"Super fast delivery and great support. The pickup point option made it very convenient to collect my project parts after classes."
Sabbir Hossain
University Student & Hobbyist
Sign in with Google +100 PTS
Get 100 Welcome Points & track your orders seamlessly.