LoL Shield Audio Spectrum VU Meter
This project uses a Fast Fourier Transform library for Arduino to analyze an audio signal, break it up into frequency bands, and display that information on the LoL Shield.
The Arduino microcontroller is fast enough to calculate a fast Fourier transformation. It lives up to its name and is surprisingly fast and accurate.Since all the work is done by the microcontroller, this project is completely portable if you use batteries.
Instructions for how to build and code this project were released on Instructables. The project was a finalist in the Instructables Microcontroller Contest and featured in the Instructables eBook Awesome LED Projects.