Components Required

Image Component Quantity Available in Kit
evive 1
USB A-B Cable 1


In many projects, we need some numerical input which is not always available by Computer Serial so a 3X4 keypad can be used as an alternative

Primarily, it contains some rows and columns and where they intersect there is a push button which connects row and column

Flowchart for reading data


This hard work can be reduced by installing Keypad.h library which can be downloaded by clicking here.


  • Arduino IDE
  • Keypad Library

Hardware connections: