View Full Version : Rainbow LED

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

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


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, 02:49 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, 03:58 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.

01-30-2012, 04:41 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

01-31-2012, 03:53 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

02-01-2012, 03:13 AM
Excellent sources - thanks! RGB - I have a red, green, and will look for a blue LED to make a rainbow generator..