This is a project you don’t see every day. Could it be more practical and more cooler than it is ? probably not. I mean I want it, i know you will too. I think they should mass produce these things. Now for those of you who don’t get the ideea, this is a cube with a light inside, you hook it to your computer and when there is new mail the cube lights up green.
If you don’t happen to have a glowing cube lying around, you can modify this to work with almost any output device you could think of, from a simple LED, or a buzzer, to something far more clever like moving a servo. The interface between the cube and your computer its done via an Arduino board. The Arduino talks with your computer over a serial connection, which runs over the normal USB cable you use to communicate with your Arduino. This is quite simple to do, and fully documented on project page so follow the links if you decide to build this project.
Gmail Light Cube – New Email Notifier: [Link]