Keypad control by Arduino - SriTu Hobby

Keypad Interfacing with Arduino Uno

Use a Keypad with Your Arduino - Projects

Use the Arduino Keyboard Library for automating simple tasks

Arduino Programmable Button Panel As Keyboard

Keyboard Instrument With Arduino (from Arduino Book)

Arduino - Keypad | Arduino Tutorial

Keypad With Arduino Without Using Keypad Library (First Tutorial)

Interface Keypad With Arduino