The Arduino uses a shift register to interact with the keyboard’s 8×10 matrix, and the sketch translates any serial data it receives into the keypresses the clone is expecting.

However, with [jakeofalltrades’] project, you can read an old-fashioned phone dial using an Arduino. The idea behind a phone dial is actually pretty simple.

Watch the video below to learn more about his Arduino-based portable keypad that connects to your Arduino development board and offers the complete alphabet, numbers 0-9 as well as several commands.