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Hey! everyone My name is Steve 19 year old from India .

Today i'm going to show you How to Connect 4x4 Matrix Keypad with Arduino .

It's Just Amazing

You Can Do Several Work with This

Click Here to See The Video

Step 1: Stuff You Need

Step 2: How to Connect

Arduino to 4x4 Matrix Keypad

D2 - Pin 1 
D3 - Pin 2
D4 - Pin 3 
D5 - Pin 4
D6 - Pin 5
D7 - Pin 6 
D8 - Pin 7
D9 - Pin 8


Arduino to Led With Resistance in Series

D10 - Led 1
D11 - Led 2
D12 - Led 3
D13 - Led 4


Step 3: Upload the Sketch

Just Plug Your USB and Upload The Sketch


Step 4: Function

  • Press 1 Led 1 Goes High
  • Press 4 Led 1 Goes Low
  • Press 2 Led 2 Goes High
  • Press 5 Led 2 Goes Low
  • Press 3 Led 3 Goes High
  • Press 6 Led 3 Goes Low
  • Press A Led 4 Goes High
  • Press B Led 4 Goes Low
  • Press # Led 1 , Led 2 , Led 3 , Led 4 Goes High
  • Press * Led 1 , Led 2 , Led 3 , Led 4 Goes Low

You Can Just Change The code little bit to Change The Function .

Step 5: Operation

Just Press The Key And See How It's Works

It's Kinda Cool

Click Here to See The Video

<p>what are the uses of this project </p>
there are many .<br>but mostly u can use it as a switch .
<p>You can save som Arduino pin's to keyboard matrix by using: http://forum.arduino.cc/index.php?topic=141978.0</p>
<p>Wow That's Really Great BTW Thanks For The Link </p>

About This Instructable

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Bio: Hi my name is Steve and i'm a Creative and I got Technical skills i can build anything just stick to my account . I ... More »
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