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Humanoido
01-30-2012, 02:36 PM
Where can I find a single LED that can reproduce all colors of the rainbow, or how to make one?

RobotWorkshop
01-30-2012, 02:57 PM
Something like this?

http://www.radioshack.com/product/index.jsp?productId=3020765

I am using one as a status indicator and by varying the PWM signal to each of the colors you can get a wide range of colors from it.

PJ Allen
01-30-2012, 03:49 PM
But that's actually 3 LEDs in one case.
Perhaps "we" are searching for an LED with a single polychromatic die.

Duane Degn
01-30-2012, 04:58 PM
SparkFun sells a few (http://www.sparkfun.com/products/10820)different types and in various amounts.

Look for "RGB" on this page (http://www.sparkfun.com/categories/172).

If you're adventureous you can also find them on eBay.

Forrest
01-30-2012, 05:41 PM
I picked-up a pen with RGB LED that strobes through the colors of the rainbow at Frys in December. I think it only cost $1.99

Forrest
01-31-2012, 04:53 AM
Here's the RGB LED Pen I got at Frys for $1.99 http://www.frys.com/product/5830373#detailed

More info here http://www.miraclebeam.com/item_display.asp?pid=2042

Humanoido
02-01-2012, 04:13 AM
Excellent sources - thanks! RGB - I have a red, green, and will look for a blue LED to make a rainbow generator..