The 4x4 Micro Switch Matrix Keypad is a compact and reliable input device ideal for a wide range of electronic and microcontroller-based projects. Featuring 16 tactile buttons arranged in a 4x4 matrix, this keypad provides a simple yet efficient solution for numeric or functional data entry. The module utilizes only 8 pins (4 rows and 4 columns) to detect key presses, reducing wiring complexity and conserving I/O resources. Each button connects its respective row and column, allowing the microcontroller to identify the pressed key through scanning techniques. Designed with durable microswitch buttons and pre-soldered headers, it’s easy to integrate into systems using Arduino, ESP32, Raspberry Pi, PIC, and STM32 platforms. Ideal for user interfaces, password systems, and educational robotics, the 4x4 Matrix Keypad offers reliability and ease of use in a lightweight, compact form. Featured By RoboticsBD.
Product Images are shown for illustrative purposes only and may differ from the actual product.
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Features:
16-Button Layout: Offers multiple input options for numeric and control functions.
4x4 Matrix Design: Efficiently detects key presses using 8 digital I/O pins.
Durable Microswitches: Provides tactile feedback and long operational life.
Wide Compatibility: Works seamlessly with Arduino, Raspberry Pi, ESP32, PIC, and STM32.
Pre-Soldered Pin Headers: Enables plug-and-play connectivity with minimal setup.
Compact Form Factor: Saves space in embedded and portable designs.
Simple Digital Interface: Ideal for direct microcontroller scanning and keypad libraries.
Mounting Holes: Four M3 holes for easy and stable installation.
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Applications:
Security Systems: Passcode entry for locks or access control.
Robotics: Used as control input for robotic arms or autonomous systems.
User Interface Systems: Ideal for navigating menus in DIY electronics.
Data Entry Devices: Perfect for calculator or configuration input.
Educational Projects: Common in electronics and microcontroller training setups.
Automation Projects: Used in programmable control panels and devices.
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| General Specifications |
| Key Count | 16 (4×4 matrix) |
| Rows | R1, R2, R3, R4 |
| Columns | L1, L2, L3, L4 |
| Operating Voltage | 3.3V – 5V |
| Interface Type | Digital (Matrix Scanning) |
| Button Type | Microswitch |
| Connector Type | Pre-soldered male headers |
| Mounting Holes | 4 × M3 |
| Compatibility | Arduino, Raspberry Pi, ESP32, PIC, STM32 |
| Dimensions | Compact and lightweight |
| Shipment Weight | 0.026 kg |
| Shipment Dimensions | 7 × 6 × 2 cm |
Please allow 5% measuring deviation due to manual measurement.
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Documentation:
How to Use the 4x4 Matrix Keypad
- Connect the Module: Use the 8-pin interface (R1-R4 & L1-L4) to connect with a microcontroller.
- Detect Key Presses: Implement row-column scanning in the microcontroller to detect which button is pressed.
- Integrate with Your Project: Use the keypad for password input, menu selection, robotic control, and more.
- Mounting Options: Secure the keypad in your project using the 4 mounting holes for a stable setup.
Package Includes:
1 x 4x4 Micro Switch Matrix Keypad
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