4×3 Membrane Switch Matrix Keypad – 12 Keys, Adhesive Back

This 4×3 membrane keypad is a versatile, thin, and flexible input device designed for Arduino and microcontroller projects. With 12 responsive keys, a durable adhesive back, and an easy-to-use cable connector, it’s perfect for applications in robotics, automation, and DIY projects.

4×3 Matrix 12 keys Membrane Switch Keypad

The DC 12V 4×3 Matrix 12-Key Membrane Switch Keypad is a high-quality, soft-touch keypad designed for durability with a lifespan of up to 100 million key presses. It offers excellent resistance to environmental factors, making it suitable for a variety of applications.

This 12-button keypad is an affordable and reliable solution for integrating a human interface into microcontroller projects. It comes with a convenient adhesive backing, allowing for easy mounting in a wide range of applications.

The 4×3 keypad layout consists of 12 buttons arranged in a matrix configuration. As a membrane keypad with no moving parts, it ensures long-term reliability and smooth operation. A female 7-pin Berg connector is required for interfacing the keypad with your microcontroller circuit.

Key Highlights:

• 12-Key Layout (3×4): Compact and user-friendly design for precise input.
• Flexible & Thin Design: Ideal for compact electronic projects.
• Adhesive Backing: Simplifies mounting on various surfaces.
• Plug-and-Play Connector: Hassle-free integration with microcontrollers like Arduino.

Features:

• Compact Size: Easy to integrate into small-scale electronics projects.
• High Durability: Designed for up to 1 million key presses.
• 3×4 Matrix Design: 12 marked buttons for versatile applications.
• Adhesive Back: Strong adhesive layer for secure placement.
• Wide Compatibility: Works seamlessly with Arduino, Raspberry Pi, and other controllers.
• Flexible Membrane: Lightweight construction, ideal for portable devices.
• Excellent price-performance ratio
• Easy communication with any microcontroller
• 5 pins 2.54mm pitch connector, 4×3 type 12 keys.
• The sticker can peel off for adhesive mounting.
• Used widely in industrial and home electronic equipment, instruments, etc.
• This allows a microcontroller to ‘scan’ the 7 output pins to see which of the 12 buttons is being pressed.

How to Use:

1. Connect the Cable: Attach the keypad’s 7-pin cable to your microcontroller.
2. Pin Mapping: Use software libraries (e.g., Arduino Keypad Library) to configure and detect the key presses.
3. Mount Securely: Peel off the adhesive back and stick it to your desired surface.
4. Test Functions: Program each button to perform specific actions in your project.

General Specification:

Package Includes:

• 1x 4×3 Membrane Switch Matrix Keypad
• 1x Adhesive Backing for Mounting