Description
Product Overview
The Matrix Keyboard with LED Display is an all-in-one interactive control module that combines a 4×4 matrix keypad with 8 integrated LEDs, creating a versatile platform for robotics projects, marquee displays, and user interface development . This “independent keyboard” design functions as a complete human-machine interface (HMI) solution, allowing you to both input commands via tactile buttons and receive visual feedback from the built-in LED indicators.
At its core, the module features a 4×5 matrix array (20 physical buttons) structured as a 16-switch matrix with 4 additional independent switches for specialized control functions . The 8 integrated LEDs can be programmed to create flowing light effects (marquee), serve as status indicators, or provide visual confirmation of button presses—perfect for smart car interfaces, robotic control panels, and interactive science projects .
The module is designed with educational and prototyping environments in mind, making it an excellent choice for Arduino programming education, robotics clubs, and electronics training . Its compact dimensions (61mm × 51mm) and included mounting hardware (4 standoffs and screws) allow for easy integration into custom enclosures or direct attachment to robot chassis .
Whether you’re building an interactive marquee sign for a school science fair, a control panel for an autonomous robot, or an educational tool for teaching microcontroller programming, this matrix keyboard with LED display provides a complete, ready-to-use solution that combines input and output capabilities in one convenient module.
Key Features
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20 Physical Buttons: 16-switch matrix array + 4 independent switches for versatile input control
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8 Integrated LEDs: Built-in indicators for status feedback, marquee effects, and visual user interaction
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Independent Keyboard Design: Functions as a standalone input device compatible with Arduino, Raspberry Pi, and other microcontrollers
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Compact Form Factor: 61mm × 51mm × 12mm dimensions designed for easy integration into robot chassis and project enclosures
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3.2V – 5V Operating Voltage: Compatible with both 3.3V and 5V logic systems
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Standard 2.54mm Socket Compatibility: Works with standard breadboards and jumper wires
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Mounting Hardware Included: 4 standoffs and screws for secure installation
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Wide Operating Temperature: Designed for reliable operation in various environments
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Marquee & Animation Ready: Programmable LEDs support scrolling light effects and visual feedback sequences
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Educational Focus: Ideal for science projects, robot car development, and microcontroller programming education
Technical Specifications
| Parameter | Operating Value |
|---|---|
| Product Dimensions (L × W × H) | 61mm × 51mm × 12mm |
| Total Buttons | 20 (16 matrix + 4 independent) |
| Matrix Configuration | 4×5 array |
| LED Count | 8 |
| Operating Voltage | 3.2V – 5V DC |
| Mounting Holes | 55mm × 45mm spacing |
| Included Hardware | 4 standoffs, 4 screws |
| Connector Type | 2.54mm pitch (standard breadboard compatible) |
| Switch Type | Tactile micro switches |
| LED Type | Standard indicator LEDs |
| Operating Temperature | -20°C to +70°C |
| Main Applications | Smart car, robotics, Arduino programming, science projects |
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