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,… ...

The Arduino project was born in 2003 at the Interaction Design Institute Ivrea in Ivrea, Italy, to provide a simple path for non-engineers to create complex devices with sensor input and actuator ...

It’s something [Daniel1111] has done with his Arduino CD player, which uses the little microcontroller board to control a CD-ROM drive via its IDE bus.