Why log on to see if your friends are available for a game of Halo 3 when you can glance at this traffic-light-indicator to see if it’s go time?
Courtesy of tinker and gamer AndrewF, this fun little hack combines a small traffic light, an Arduino board, and the Xbox live API to provide a real-time indicator of how many of your friends are online and gaming.
When the light is red, nobody is available to play. Yellow and green indicate one and several of your friends are available. Hit up the link below to check out the parts list and project code.