Well its been a couple days and I have completed the current design of the LED bed Adaptive color controller.

Therory of operation:
1. A set of 3 photo-diodes each tuned to red, green, and blue light will convert light into voltage.
2. A 2-stage Amplifier circuit for each color(red, Green, Blue, and White) will provide the control to a FET
a) the first stage is an inverting amp with a -1 gain.
b) the second stage is set up as a voltage controlled Current Source, using the Amp and the FET
3. The current source will change current based on the output voltage from the Photo-Diodes.

Well I was going around hack-a-day today and saw the "led pimp bed" article. Well I decided to take the challenge of designing the adaptive color controller. But first I wanted to make a few design improvements to the LED module itself

First, I drew out the schematic.