Its been a while. I've been very busy...
Anyways while doing my project I found some kool figures can be made using the ellipse radial equations. I've been thinking a good trainning project can be made from this for a newbie. I just don't have the time to do it.
The idea is to use one of these figures (or several) and feed one of the equation vaiables with samples coming in from a sensor connected to an Arduino analog input, let's say audio fom a mic, an LDR, or any other changing souce. A simple manually controlled pot could be the first item to try and so on. The figure could be animated and it will change shape (and maybe colors) in sync with the incoming signal. The Processing sketch should not be very difficult.
The Processing sketch I wrote to draw the figures is here:http://adrianelectronics.com/index.php?p=1_38_Software
Hope someone do it.