Tags: Keypad, Membrane, Sealed, 4X4, Button, Arduino, AVR, PIC

Keypad Membrane Sealed 4X4 Button for Arduino AVR PIC

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    • Product Code: Digital
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    This is a 4x4 matrix sixteen key membrane switch keypad that is easy to use and will look nice in your project. It has 8 outputs and 16 key, you should use the “Scan mode” to judge which button has been pressed down. Support in Arduino, AVR, PIC, STM, Raspberry PiThe adhesive backing on this low-pro..
    This is a 4x4 matrix sixteen key membrane switch keypad that is easy to use and will look nice in your project. It has 8 outputs and 16 key, you should use the “Scan mode” to judge which button has been pressed down. Support in Arduino, AVR, PIC, STM, Raspberry Pi

    The adhesive backing on this low-profile membrane keypad allows you to place it just about anywhere. The 16 keys are wired in a 4x4 matrix, readily decoded with an Arduino. The electrical connection is via a flat flexible ribbon cable terminated with a breadboard friendly 0.1" pitch single row female connector. 

    The simplest decoding method requires a digital output for each column and a digital input for each row. The pin count can be reduced by adding a resistor divider network and creatively using the Arduino's analog input capability.  you can use this Arduino Keypad.h Library Click here to DOWNLOAD it.

    The 0.1" single row female header is breadboard friendly (when coupled with a male single row header). The overall dimensions of the membrane are 78mm Tall x 70mm Wide, The flexible ribbon cable is 75mm long (not including the connector).
    This is a great way to experiment with matrix decoding on the Arduino!
    Arduino code 4x4 Keypad

    This Video will help you start with Keypad Membrane Sealed 4X4 Button for Arduino you will learn how to work and wire the keypad with Arduino :


    This is the Arduino code for 4x4 keypad.

    This video shows you how to use 4x4 keypad for arduino.
    1. Library code for 4x4 Keypad
    /*
     * Original sourse: https://playground.arduino.cc/Code/Keypad
     * This is the Arduino code for 4x4 keypad.
     * watch the video for details and demo http://youtu.be/qIDzzG2LUtg
     *  * 
     * Written by Ahmad Nejrabi for Robojax Video channel www.Robojax.com
     * Date: Dec 18, 2017, in Ajax, Ontario, Canada
     * Permission granted to share this code given that this
     * note is kept with the code.
     * Disclaimer: this code is "AS IS" and for educational purpose only.
     * this code has been downloaded from http://robojax.com/learn/arduino/
     * 
     */
    /* @file HelloKeypad.pde
    || @version 1.0
    || @author Alexander Brevig
    || @contact [email protected]
    ||
    || @description
    || | Demonstrates the simplest use of the matrix Keypad library.
    || #
    */
    #include <Keypad.h>
    
    const byte ROWS = 4; //four rows
    const byte COLS = 4; //three columns
    char keys[ROWS][COLS] = {
      {'1','2','3','A'},
      {'4','5','6','B'},
      {'7','8','9','C'},
      {'*','0','#','D'}
    };
    
    byte rowPins[ROWS] = {2, 3, 4, 5}; //connect to the row pinouts of the keypad
    byte colPins[COLS] = {6,7,8,9}; //connect to the column pinouts of the keypad
    
    Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
    
    void setup(){
      Serial.begin(9600);
    }
      
    void loop(){
      char key = keypad.getKey();
        // just print the pressed key
       if (key){
        Serial.println(key);
      } 
      
      // this checkes if 4 is pressed, then do something. Here  we print the text but you can control something.
      if (key =='4'){
        Serial.println("Key 4 is pressed");
      }
    }
    				

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    Tags: button;keypad;input

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