Code on GitHub.
music from: http://archive.org/details/techno_911
Description in the works…
Code on GitHub
There is a great tutorial on how to setup and use a 2×16 LCD on the Arduino website:
Here’s a good explanation of FFT theory:
My pinout is a little different because I wanted to save as many PWM pins to add servo control for the next stage of this project. I’ve been tinkering with the idea of moving physical objects around based on audio input, instead of just showing levels on a display.
To visualize the frequency levels of the incoming audio signal I use the 8-bit Fast Fourier transform code which is discussed here:
Honestly, I’m not convinced that what I’m seeing on the display is an accurate representation of the audio spectrum that I’m listening to, but it looks pretty cool and that’s all I really care about at this point. There is hardware available that would produce much more accurate results than this software. There is a “Color Organ” project on the Make website that I’d like to build someday:
Code and libraries on GitHub
You can send all kinds of fun stuff to a TV from an Arduino using the TVout Library. All you need is an RCA cable and two resistors (470 & 1k).
TV Ground to Arduino Ground
TV Signal to 470 to pin 7
TV Signal to 1k to pin 9
(Audio to pin 11)
Here is the one I built to experiment with:
It works! When I get another long RCA I’ll add audio support.
and you can do what with what!!!