4x4 Keypad Module

4x4 keypad is a module used with different programmable boards for used for loading numbers as an input. It consists of 16 buttons in form of four lines and four columns.

Components Required:

• Arduino UNO
• Jumper wires
• 4x4 Keypad Module

Connecting with Arduino:

 4x4 keypad consists of 8 pins:

• 1-4 pins are rows
• 5-8 pins are column

Connections:

• Connect PIN 1 of keypad to PIN 2 of Arduino
• Connect PIN 2 of keypad to PIN 3 of Arduino
• Connect PIN 3 of keypad to PIN 4 of Arduino
• Connect PIN 4 of keypad to PIN 5 of Arduino
• Connect PIN 5 of keypad to PIN 6 of Arduino
• Connect PIN 6 of keypad to PIN 7 of Arduino
• Connect PIN 7 of keypad to PIN 8 of Arduino
• Connect PIN 8 of keypad to PIN 9 of Arduino

Adding keypad library:

• Click on Sketches -->>Include library--> then type “keypad”
• Click install

Code:

• Copy the code below and paste in Arduino IDE
• Click on Upload

Recording output:

• Open serial monitor
• Press button of 4x4 keypad