4×4 Numeric Keypad Module Overview
The Numeric Keypad Module (4×4) is a compact, reliable input device designed for Arduino, Raspberry Pi, microcontrollers, and custom electronics. The module uses a standard 4 by 4 matrix layout to provide 16 keys with clear printing and a soft, tactile click. It is perfect for password entry, menu navigation, numeric input, and control panels in both hobby and professional projects.
Why Choose This 4×4 Keypad
- Simple matrix output that is easy to read with common keypad libraries
- Wide voltage compatibility: operates from 3.3V to 5V
- Durable flexible membrane that is lightweight and easy to mount
- Standard single-row 8-pin header for fast wiring and prototyping
Common Applications
- Arduino numeric keypad projects and educational kits
- Access control and keypad-based door locks
- Industrial panels and embedded system inputs
- Robotics, counters, timers, and menu navigation
- Prototyping on breadboards or panel mounting in custom enclosures
Key Features
- 4×4 matrix layout with 16 clearly marked keys (0-9, A-D, *, #)
- Responsive tactile feel with durable membrane construction
- Operating voltage: 3.3V to 5V for broad microcontroller compatibility
- Connection: 8-pin single-row header for easy wiring
- Output: matrix-style digital signal compatible with keypad libraries
- Compact size: approx. 70mm x 77mm for tight spaces
Technical Specifications
- Layout: 4×4 Matrix
- Keys: 0-9, A-D, *, #
- Operating Voltage: 3.3V to 5V
- Connection: 8-pin single-row header
- Size: 70mm x 77mm (approx.)
- Material: Flexible plastic membrane
- Output: Matrix-style digital signal
Compatibility and Wiring
Wiring the 4×4 numeric keypad is straightforward. It exposes 8 pins (4 row lines and 4 column lines) that connect directly to digital inputs on Arduino, Raspberry Pi (with appropriate voltage considerations), and other microcontrollers. Use common keypad libraries for direct support and simple code examples.
Quick Setup Tips
- Use internal pull-up or pull-down resistors on microcontroller inputs as required
- Map rows and columns in software to match your wiring order
- Debounce key presses in code to avoid false triggers
- Mount on a flat surface or breadboard for stable use
Mounting and Integration
The keypad can be panel-mounted or used free-standing on breadboards and prototype rigs. Its flexible back allows snug fitting in enclosures while remaining easy to remove for adjustments. Clear key printing improves visibility in low-light or quick-entry situations.
Why It Was Made
Projects need simple and accurate input. This digital keypad module was made to deliver fast, reliable numeric input in small spaces. It is ideal for entering passwords, controlling functions, or navigating menus and user interfaces.
Why Buy From Colgroad
At Colgroad, we stock trusted components like this keypad module 4×4 with fast delivery across Pakistan. Our inventory is selected for hobbyists and professionals, offering genuine parts, fast support, and great value.
Call to Action
Bring your next project to life with a reliable numeric input. Buy this 4×4 keypad module today from Colgroad for fast delivery in Pakistan.
Note: Images are for illustration purposes only.
Voltron (verified owner) –
Voltron –