Fading Arduino RGB LED from one color to the other?

Question

I\'ve currently managed to get my LED to cycle through eight colors that I\'ve selected. Everything is working correctly, except that I want to go for a more natural feel, and w

Answer 1

If you want to fade between colours, work in a colourspace which makes it easy and then convert back to RGB at the end.

For example, work in HSL colour space, keep S and L constant (say a fully saturated and bright colour) and then "fade" H around the circle - you'll go from red through green, blue and back to red. Convert back to RGB and then use those values for your LED drives. I used this technique for a "mood lamp" app, and other code for the colour space conversion can be found on SO.