4×4 Matrix Keypad

The 4x4 Matrix Keypad is a user-friendly input device consisting of 16 keys arranged in a 4x4 matrix. It is widely used in embedded systems, microcontroller projects, and DIY electronics for user input. Each key press is detected by scanning the matrix, allowing for efficient and reliable data entry. The keypad is compact, durable, and easy to integrate into various projects. 

Key Features:

• Key Configuration: 4 rows and 4 columns, totaling 16 keys
• Interface: Matrix scanning
• Key Labels: Numeric and function keys (0-9, A-D, *, #)
• Compact Design: Suitable for handheld devices and small projects
• Durable: Made from high-quality materials for long-lasting use
• Flexible: Can be connected to any microcontroller or development board
• Low Power Consumption: Efficient operation with minimal power usage

Technical Specifications:

• Number of Keys: 16 (4x4 matrix)
• Operating Voltage: 3.3V to 5V
• Current Consumption: < 10mA
• Contact Resistance: ≤ 200 ohms
• Insulation Resistance: ≥ 100M ohms (at 250V DC)
• Operating Temperature Range: -20°C to +60°C
• Keypad Dimensions: 69mm x 69mm x 1.8mm
• Connection Type: 8-pin header

Applications:

• Embedded Systems: User input for microcontroller-based projects.
• DIY Electronics: Ideal for hobbyists and makers creating custom projects.
• Access Control: Use in security systems for code entry.
• Consumer Electronics: Keypad input for appliances and gadgets.
• Educational Projects: Commonly used in educational kits and learning modules.

Usage:

1. Wiring: Connect the 8-pin header to the microcontroller or development board, ensuring correct row and column connections.
2. Programming: Use libraries (e.g., Keypad library for Arduino) to read key presses and handle input.
3. Integration: Incorporate the keypad into your project for reliable user input.
4. Testing: Verify the functionality by pressing keys and checking the output.

Caution:

• Proper Connection: Ensure the keypad is connected correctly to avoid malfunction.
• Voltage Levels: Operate within the specified voltage range to prevent damage.

Datasheet: For detailed technical specifications, refer to the 4x4 Matrix Keypad Datasheet.