2 x 2 Matrix 4 Push Button Keyboard Module

The 2 x 2 Matrix 4 Push Button Keyboard Module is a compact, easy-to-integrate keypad ideal for user input in DIY electronics, robotics, or embedded systems projects. Featuring 4 tactile microswitches arranged in a 2×2 matrix format, the module allows multiple key inputs using just four I/O pins.

Each key is mapped through a matrix configuration, with two pins (R1–R2) for rows and two pins (L1–L2) for columns. This design minimizes required GPIOs while enabling simple key scanning using microcontrollers such as Arduino, ESP32, or Raspberry Pi. The module comes with a 90-degree pre-soldered header and has clearly marked pinouts for hassle-free wiring. It also includes four 3mm (M3) mounting holes for easy chassis integration.

🔧 Key Features

• 2×2 matrix configuration – 4 total inputs
• Microswitch tactile buttons for positive feedback
• Clearly labeled pinout (R1, R2, L1, L2)
• 90° pre-soldered header for easy breadboard use
• Compact design with sturdy PCB
• Suitable for digital input projects, menus, and settings

📐 Technical Specifications

📌 Applications

• User input interface for microcontroller projects
• Menu selection, passcode input, or function triggers
• Embedded systems and control panels
• DIY electronics and educational kits
• Portable or fixed robotics controls

💡 Why Choose This Module?

The 2 x 2 Matrix Push Button Keyboard module offers a simple, low-cost, and reliable method for inputting multiple signals into your system. The matrix configuration helps reduce pin usage while still enabling multi-key functionality, and the compact design makes it suitable for almost any project environment.

📦 Package Includes

• 1 × 2 x 2 Matrix 4 Push Button Keyboard Module