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Topic: 2 pin RGB rainbow-LED (Read 4646 times) previous topic - next topic

o_lampe

Just stumbled across a neat LED that shows rainbowcolors by itself:
http://www.superbrightleds.com/moreinfo/component-leds/rgb-slow-color-changing-led/778/

Has only 2 pins and with a few of these you can make a real multicolor rainbow. Just switch them on separately with a  four seconds delay.
It's not my fault when my Posts are full of Errors. This stupid autocorrection from my browser is set up for german grammar.

frollard

it would work but they don't have accurate timing in their internal processors, so the temporal drift would make them do random things as they heated and cooled differently.  It only takes a miniscule change at 'megahertz' to multiply quickly into a real distortion.

o_lampe

Makes sense...
Would be a bit overkill to use these LEDs and syncronize them by sampling their color.  :smiley-roll:
It's not my fault when my Posts are full of Errors. This stupid autocorrection from my browser is set up for german grammar.

Grumpy_Mike


Would be a bit overkill to use these LEDs and syncronize them by sampling their color.  :smiley-roll:

Not only overkill but it would not work. The only control you have over them is on or off, you have no way to synchronize them.

dhenry

Quote
It only takes a miniscule change at 'megahertz' to multiply quickly into a real distortion.


That by itself can be an interesting effect.

Or you can synchronize them by turning them off / on quickly periodically.

dhenry

Quote
Would be a bit overkill to use these LEDs and syncronize them by sampling their color.


You can sample its current: at some point it is going to cycle all of leds off - that's when you can synchronize them. It does require two pins per led for this to work.

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