I am trying to find a way of determining the colour of an LED without an electrical connection to it, i.e a sensor pointed at the LED. I can place the sensor quite close to the RGB LED I intend to measure, but i'm struggling to come up with something that will do what I need.
I will be using the sensor with a micro controller of some kind, probably an arduino, or the ti myRIO.
I found this Colour sensor however it looks like it might be overkill for my requirements.
Many of the other sensors I have come across work by shining RGB LED's on the object and measuring what is reflected back. I don't think they would work when the object I am measuring is a light source in itself. Am I correct here? For example
Are there any other solutions that I am missing?