4×4 Matrix Keypad Membrane Switch for Arduino, ARM and other MCU
Review: 5 - "A masterpiece of literature" by John Doe, written onMay 4, 20020

4×4 Matrix Keypad Membrane Switch for Arduino, ARM and other MCU

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  • Product SKU: KG032
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A 4 by 4 keypad is a type of input device commonly used in electronics and microcontroller-based projects. It consists of a thin and flexible membrane with printed conductive traces forming a matrix of buttons in a 4×4 Matrix Keypad configuration.

Here's how it works:

Structure of 4×4 Matrix Keypad:

The membrane switch is typically made of a flexible material like polyester, with conductive ink traces printed on the underside. The top layer is usually made of a durable material like polycarbonate or polyester with a matte finish to provide a smooth surface for pressing the buttons.

Matrix Configuration of 4×4 Matrix Keypad:

The switch contains a 4x4 matrix of buttons, totaling 16 buttons. Each row and column of buttons has a conductive trace associated with it.

Button Press of 4×4 Matrix Keypad:

When a button is pressed, it creates a connection between the corresponding row and column traces, effectively closing a circuit.

Scanning of 4×4 Matrix Keypad:

To detect button presses, the microcontroller (such as Arduino) scans the rows and columns sequentially. When a button is pressed, the controller can identify the specific row and column intersection where the connection is made.

Output of 4×4 Matrix Keypad:

Based on the detected row and column intersection, the microcontroller can determine which button has been pressed and respond accordingly, such as displaying a character on an LCD or executing a specific function in the program.

4x4 Matrix Keypad Membrane Switches are popular in various applications where a simple and cost-effective user interface is needed, like security systems, access control panels, electronic locks, calculators, and more. They are easy to integrate and provide reliable input functionality for a wide range of projects.

Versatile Applications of 4×4 Matrix Keypad

The 4x4 Matrix Keypad's durability and versatility make it suitable for a wide range of applications. From security systems and access control to data entry and automation, this keypad offers a multitude of possibilities. 4x4 membrane keypad Arduino's reliability and longevity ensure that it can handle frequent use and demanding tasks, providing consistent performance throughout its lifespan.

    Technical Details

    • Voltage(V) : DC 35V
    • Operating Current (A): 0.1
    • Contact Resistance: 500Ω
    • Insulation Resistance (MΩ): 100
    • Dielectric Strength: 250VRms

    Physical Attributes of 4 by 4 keypad

    • Length * Width * Height in mm 165 * 70 * 1
    • Weight in gm: 4

    Integration with Arduino of 4 by 4 keypad

    Products 4×4 Matrix Keypad


    Sample Code

    Integration with Raspberry Pi

    Products 4×4 Matrix Keypad

    Sample Code

    Product Video


    Package Includes

    • 1 x 4×4 Matrix Keypad Membrane Switch for Arduino, ARM and other MCU

    Customer Reviews

    Based on 4 reviews
    abdul rahman
    Great product - very standard

    Used these to build a nice macropad for my computer - worked great. These standard little matrix membrane keypads are perfect for prototype projects before you want to invest in a mechanical keypad

    doodhnath pandit
    Fast, fair, works, thanks!

    You might be able to get this cheaper from China but your going to half to wait a month. I got it in 2 days. Finished the prototype for the class project and now I'm studying Thermo. There is so much free info out there to support you in your projects with this guy if you're new. Have fun creating!

    akash gupta
    Excellent transaction

    Excellent transaction

    badshya khan
    Perfect for installation of keypad on golf cart.

    Used this keypad to mate with an ESP8266 onto my golf cart. Allows me to enter code to open/close two garage doors from the golf cart. Quality product.