After a friend showed him how convenient it was to have keypad entry to his vehicle, [EdsJunk] decided it was time he built his own. The build uses a spare waterproof keypad attached to an Arduino ...

Keypad pin 4 to Arduino digital 8 //R4; Keypad pin 5 to Arduino digital 4 //C3; Keypad pin 6 to Arduino digital 7 //R3; Keypad pin 7 to Arduino digital 6 //R2; Since keypads are available from many ...

If you want to add a keypad to your Arduino project, the options are pretty limited. There’s that red and blue 4×4 membrane we’ve all seen in password-protected door lock projects,… ...

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.

This project uses a $30 Arduino Uno R3, an RGB LCD display, a waterproof temperature sensor, food grade heat shrink, and a few other components, all of which are available at the link below from ...