Vitaliy <piclist <at> maksimov.org> writes:

> > An LED can be made to detect light.  Put a red LED next to any red LEDs
> > on your unit, green next to green, etc.  Make sure that the detecting
> > LEDs have colored lenses, even if the LEDs on the unit are clear.
>=20
> Yeah, I remembered reading an article back in the 1990s about LEDs being=
=20
> used as photodiodes, so we did a bit of experimentation and found that th=
e=20
> S/N is too low for our application.
>=20

How about color sensor like TCS3200 from parallax?  Comes complete with len=
s, so
it should be "easy" to detect intensity and color at the same time.=20

Sergey Dryga
http://beaglerobotics.com




--=20
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