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rgb led

red green blue common cathode light emitting diodes anybody know any cool projects with them? The best ones I found were the hypno cubes and pov's, and some displays were cool. any others? I want to know before I buy a bunch of leds to save on shipping.

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Mar 15, 2008. 11:20 AMkillerjackalope says:
I know this is old but do you mean the ones that can be controlled, if so I have a tonne of ideas for them but even the ones that just change of their own accord would be intersting for many of these, a nice lightbox is one, i have one from Ikea that is actually a very complicated string or single colour leds rgbs would be more efficient and with little more than a timer circuit and some wit a a colour waving box could be made...
Mar 15, 2008. 11:45 AMkillerjackalope says:
Hmm it would be nice to have a lighting system controlled by these, flip a switch or trun a knob and change colours There are a lot more uses for these, you could actually do some charlieplexing and make a rudimentary display system with them...
Mar 15, 2008. 11:49 AMwhatsisface says:
There's an iBle on watching futurama on a 8x8 LED display

http://www.instructables.com/id/watch-futurama-on-an-8x8-pixel-screen/?ALLSTEPS
Mar 15, 2008. 11:51 AMkillerjackalope says:
the interesting thing is here you'd be able to have real colours and if you dedicated a bit of time 100 X 100 wouldn't be that hard, especially is you made a simple board for the LEDs....
Mar 15, 2008. 11:54 AMwhatsisface says:
And had the money for 10000 LED's. Plus getting a microcontroller with enough outputs to drive them may be tricky, put you could use more than 1. I wonder how many you could get as "Free samples".
Mar 16, 2008. 4:38 PMkillerjackalope says:
I was only saying it's a nice idea, however a microcontroller could be used to control a circuit that create waves of colours and the like, and if someone was very clever I'm sure a volume level meter could be made that simply shifts colour rather than has a bunch of leds, infact that'd be pretty sweet on the whole.
Mar 18, 2008. 10:16 AMwhatsisface says:
That would be pretty cool...
Mar 18, 2008. 10:49 AMkillerjackalope says:
I don't think it would actually be too complicated, basically instead of raising the voltage for the next stage you be raising the voltage on different legs of the RGB
Mar 15, 2008. 11:59 AMwhatsisface says:
*but
Mar 16, 2008. 4:39 PMzachninme says:
I have a project using RGB leds -- its cool and relitively cheap, using only 8 of them.

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