Matrix 4×4 16 Keypad Keyboard Module

Matrix 4×4 16-Key Keypad Keyboard Module is a compact input device featuring a 4-row by 4-column push-button matrix, providing 16 individual keys for user input. Designed for microcontroller projects, it offers a simple interface for entering numeric, alphabetic, or command inputs in embedded systems, DIY electronics, and control panels.

Key Features:

• 4×4 Key Matrix: Provides 16 tactile push buttons arranged for efficient input scanning.
• Simple Wiring: Uses row and column connections to minimize required I/O pins.
• Microcontroller Compatible: Works seamlessly with Arduino, Raspberry Pi, and other platforms.
• Durable Buttons: Long-life tactile switches for reliable operation.
• Compact PCB Design: Ideal for breadboard and custom enclosure integration.

Technical Specifications:

• Key Arrangement: 4 rows × 4 columns (16 keys total)
• Operating Voltage: 3.3V to 5V DC
• Switch Type: Tactile push button (momentary contact)
• Connection Interface: 8-pin header (4 row pins + 4 column pins)
• Contact Bounce: Debouncing required in software for clean input

Mechanical Specifications:

• PCB Material: FR4 with solder mask
• Pin Header: Standard 2.54mm pitch male header
• Button Cap: Integrated tactile switch actuator

Dimensions:

• PCB Size: Approx. 43 mm × 38 mm
• Mounting Holes: Not included (compact integration-friendly design)

Pinout and Wiring:

• R1–R4: Row lines for scanning keys
• C1–C4: Column lines for scanning keys
• Wiring Tip: Use keypad scanning libraries for simplified code implementation

Datasheet Reference:

• Search online for “4×4 matrix keypad module datasheet” for detailed pin mapping and sample code

Applications:

• Embedded System Inputs: Enter commands, passwords, or numeric data.
• Security Systems: Keypad-based access control units.
• DIY Electronics: Menu navigation in hobby projects.
• Control Panels: User interface for automation systems.

Equivalent Models:

• Membrane 4×4 Keypad: Flexible keypad with same pinout and function.
• 3×4 Matrix Keypad: Reduced key count alternative for smaller applications.
• Custom PCB Keypads: Designed for specific embedded systems with matrix scanning.

Package Includes:

• 1 × Matrix 4×4 16-Key Keypad Keyboard Module