I have to say that, at first all of this sounded a lot harder than it actually is. The problem is that there are a lot of deprecated methods still being brought up which causes a lot of headache and confusion. Thanks for Ambibox (Probably THE best screen capture for Ambilighting). Without it, I would probably still try to setup all my zones in Processing only to become disappointed by the results.
Here is my current setup:
55" LG 3D TV
100 bullet type WS2801 LEDs
Arduino Uno R3 running Adalight
Ambibox v2.1.0 + Playclaw 4 to capture video players, games, etc.
XBMC for normal Videos
KMPlayer for 3D Videos
Total cost to get everything working was around 120 Euros.
Connecting the LEDs to the Arduino was a breeze. Supplying enough power for 100 LEDs was not a problem thanks to the 5v 10A Power Supply. Uploading the necessary sketches to the Arduino and running the first test pattern worked "right out of the box". The most frustrating and head ache causing part was the screen capturing software...
Processing - Old and deprecated, you have to define each zone using x and y coordinates. You have little to no control over color, gamma, etc. It is also one of the slowest screen capturing software out there.
Atmolight - This one has given me the most head aches for sure... The sketches needed for this just didn't want to upload to the Arduino Uno. I can't say if the software itself is any good since I was not able to test it.
Lightpack (now Prismatik) - Very good software, lots of options, and great compatibility. Only problem...setting up the zones. If the zone calculator wasn't this weak, this would have been a good choice.
Ambibox - Much like Prismatik but this time...everything is working the way it should! Individual color adjustments for each zone, great zone wizard, just awesome. User demmax2004 was kind enough to iron out any issues I had in getting Ambibox up and running and I would like to thank him for that. Thanks to him, I now have a ambilight setup that I could have only dreamed of!
In order to show you my satisfaction, I have prepared a short video and a few pictures of my current setup!
Please feel free to ask any questions you may have.







Youtube Video - http://www.youtube.com/watch?v=I_icyqHsk0M
Good luck!


