Super cool project for those super human geek types.
The Arc Reactor first started out as a Calgary Comic & Entertainment Expo demo in order to augment the intelligence and add superhuman-level multitasking. It was so popular that we decided to make it into a kit so everyone can feel some superhuman in them. This realistic looking pendant is supposed to be worn under the garment and shine through with 6 pre-programmed color and pulsing modes.
This project uses an Arduino Pro Mini processor, a NeoPixel ring, and a LiPo battery. Other misc parts are used to put everything together. This is a perfect introduction to microprocessor-based electronics... The infamous "Hello World" mixed in with a bit of addressable LED magic. Huge WoW factor for very little effort!
The new detailed tutorial is located here.
See the Arc Reactor in action: