One of the problems that I run into all the time at work is using Skype and other online conferencing systems and a pair of bluetooth headphones. Invariably, I'll be on a call and someone will walk up expecting me to be able to talk. After interrupting me once again, I had someone make the offhand comment that I needed a light to show if I was available or not. This project is the result.
I'm a total novice at designing circuits and programming, so be gentle in your critique.
I've uploaded the circuit board files to github.
The Gerber files are formatted for production through DirtyPCBs.com
The star I used at work was printed from a custom STL and the circuit board shared by ronp5683 at OSHPark.com