(blogarhythm ~ Diablo - Don't Fret)
The Fretboard is a pretty simple Arduino project that visualizes the build status of up to 24 projects with an addressable LED array. The latest incarnation of the project is housed in an old classical guitar … hence the name ;-)
All the code and design details for The Fretboard are open-source and available at fretboard.tardate.com. Feel free to fork or borrow any ideas for your own build. If you build anything similar, I'd love to hear about it.