Color sensing with Arduino - Explained

In this video I explain how to sense color of objects with Arduino. You can find more detailed description, and source code in this page: https://sharedinventions.com/?p=209

I have used BPX-43 photransistors as sensors. But I'm not sure I'm using then right. ... https://www.youtube.com/watch?v=c46GH6R1cUY