4×4 Keyboard for Arduino

by Linksprite in Circuits > Arduino

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4×4 Keyboard for Arduino

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In Arduino app system, keyboard is one of the indispensable component to
man-machine dialogue. When the button is less, we can connect the button to the I/O port of Arduino. While there need more button and the I/O resource of Arduino is limit, it is better to choose the matrix keboard. Next I will demo that use the 4 * 4 keyboard on Arduino.

Step 1: Part List

  1. 1 x Arduino UNO
  2. 1 x 4*4 keyboard
  3. 8 x Wire

Step 2: Wiring Diagram

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Step 3: Test Code

Test code in here :

http://learn.linksprite.com/arduino/4x4-keyboard-for-arduino/

Step 4: Run Test

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(1) Connect the wiring according to the wiring diagram

(2) Download the Arduino library in attachment and save it to the Arduino IDE libraries:

(3) Open the ArduinoIDE and put the test code into the IDE, compile and download:

（4）Open the serial Monitor, set the baud rate to 9600, press any key and you will see the corresponding key value in the monitor；

Step 5： Download Code

Arduino Library：keypad

http://cnlearn.linksprite.com/wp-content/uploads/2...