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colored led recognition with photoresistor or -diode

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Chris_D:
Hallo,
I have this project in mind: I want to create an array of leds, with different colours, wich should be recognized - so to speak - by photoresistors or -diodes(or better: the resistor should react on the color of the led).
Is there someone who already tried to do this? I mean: one photoresistor should recognize a red led for instance, and the other a green led, and they shouldn't be able to react on the color of the other.

BeBuLamar:
You would need 3 photoresistors (or some integrated device with 3 sensors) and the R,G,B filters.

Chris_D:

--- Quote from: BeBuLamar on November 26, 2021, 03:18:11 pm ---You would need 3 photoresistors (or some integrated device with 3 sensors) and the R,G,B filters.

--- End quote ---
Do you mean creating RGB filters or do they exist? Because I want to create a really huge array of leds.And I want to do it as cheap as possible.

Benta:
It's called a Bayer filter. Do a search.

Kleinstein:
There are ready made light sensors with integrated filters, a bit like a 1 pixel camera.

For a large array I would consider a camera.

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