4×4 matrix keypad


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Enhance your Arduino projects with the reliable and durable 4×4 Matrix Array/Matrix Keyboard. This high-quality membrane switch keypad offers 16 keys for efficient input control. With its impressive electronic and mechanical characteristics, it ensures accurate and responsive performance, making it ideal for various applications. Whether you’re a hobbyist or a professional, this keypad is designed to meet your needs for precision and reliability.


  1. Electronic Characteristics:

    • Circuit Rating: 35V (DC), 100mA, 1W
    • Contact Resistance: 10Ω to 500Ω (varies based on lead lengths and material used)
    • Insulation Resistance: 100MΩ at 100V
    • Dielectric Strength: 250VRms (50Hz to 60Hz for 1 minute)
    • Electric Shock Jitter: Less than 5ms
    • Lifespan: Tactile type: 1 million times
  2. Mechanical Properties:

    • Operating Pressure: Touch feeling: 170g to 397g (6oz to 14oz)
    • Switch Travel: Touch-type: 0.6mm to 1.5mm
  3. Environmental Parameters:

    • Operating Temperature: -40°C to +80°C
    • Storage Temperature: -40°C to +80°C
    • Temperature Test: 40°C, 90% to 95% humidity, 240 hours
    • Vibration: Maximum 20G (10Hz to 200Hz, per Mil-SLD-202 M204.Condition B)


The “4×4 Matrix Array/Matrix Keyboard 16 Key Membrane Switch Keypad for Arduino” is a versatile input device suitable for various applications. Here are some examples of its potential uses:

1. Electronics Projects: The keypad can be integrated into Arduino-based projects, such as home automation systems, robotic control interfaces, digital input panels, and more.

2. Human-Machine Interface: It can serve as a user interface component in industrial control systems, allowing operators to input commands and parameters conveniently.

3. Security Systems: The keypad’s tactile buttons make it suitable for password-based access control systems, security alarms, and other authentication applications.

4. Gaming Devices: The responsive and durable keys of the keypad can be utilized in DIY gaming consoles or as additional controls for gaming interfaces.

5. Educational Tools: The keypad is a valuable component in electronics and programming education, teaching students about input control and interface design.

6. Automation and Control Panels: It can be used in control panels for various automated systems, including machinery, equipment, and industrial processes.

7. Instrumentation and Measurement: The keypad’s compact design and reliable performance make it suitable for integration into measurement devices, data loggers, and scientific instruments.

8. DIY Electronics: The keypad offers a cost-effective solution for hobbyists and makers who want to add user input functionality to their custom-built electronic projects.

FAQs and Answers

Q: Can I use this keypad with my Arduino Uno?

A: Yes, the 4×5 Matrix Array/Matrix Keyboard is compatible with Arduino Uno and various other Arduino boards.

Q: How do I connect this keypad to my Arduino?

A: The keypad can be easily connected using the digital input/output pins on your Arduino board. Refer to the product documentation for detailed instructions.

Q: Can I use this keypad for password input or security applications?

A: Absolutely! The 4×5 Matrix Array/Matrix Keyboard is suitable for password input and other security-related applications. Its accurate input control ensures reliable performance.

Q: What is the lifespan of this keypad?

A: The tactile type keypad has a lifespan of one million times, making it highly durable for long-term use in your projects.

Q: Can this keypad withstand harsh environments?

A: Yes, this keypad is designed to operate in a wide temperature range from -40°C to +80°C, making it suitable for various environments. It is also tested to withstand vibrations and temperature fluctuations.

Q: Is it possible to customize the key layout on this keypad?

A: The 4×4 Matrix Array/Matrix Keyboard comes with a fixed 4×4 key layout. If you require customization, please reach out to our support team for further assistance.

Q: Does this keypad require any additional libraries or drivers for Arduino?

A: No, this keypad can be easily interfaced with Arduino using standard digital input/output functions. No additional libraries or drivers are required.

Q: Can I use this keypad for gaming applications?

A: While this keypad is primarily designed for general input control, it can be utilized for gaming applications that require simple button inputs.

Q: Is this keypad suitable for industrial applications?

A: Yes, the 4×4 Matrix Array/Matrix Keyboard’s robust construction and reliable performance make it suitable for various industrial applications requiring accurate input control.

Q: Can I integrate multiple keypads together?

A: Yes, it is possible to integrate multiple keypads together to expand the number of input keys. However, additional wiring and coding may be required.


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