LED lumias
Since lumias seem to be the latest craze I feel the urge to bring up the question if you can use LEDs instead of lasers with lumias. It seems like a much cheaper solution, especially for those very welcome blue colors. You can get pretty narrow beams with LEDs, especially if you use optics.
I built this simple lumia-like LED contraption:
http://www.youtube.com/watch?v=PTKiEO8uTYc
http://tocket.mine.nu/albumtest/temp...lbumtest%2fled
It uses 11 1W LEDs, 5 red, 3 green and 3 blue that are controlled by PWM. On top of them is a glass bowl, like this:
Rotating or slowly moving the bowl creates a very nice effect, but it is rather heavy.
Has anyone else built LED lumias before? Do you think it's a good idea?
Oh, here's an interesting effect of PWM with my camera that I noticed.
http://www.youtube.com/watch?v=YgrUZHSN9NE
You can really see the pulse width in an almost matrix-like effect. I have seen this phenomenon with my camera before, recording some explosions, but never been able to fully explain it. Why do CCDs do that?
Here's the brain in my next LED project in progress by the way:
An Arduino microcontroller. These things are wonderfully easy to use. It took me about 30 minutes to make an IR remote controlled RGB color mixer using it. I've never programmed for anything but my computer before and I'm not particularly good at electronics either.
As for the project... Well, 5 3W RGB LEDs are on their way to me from china now. They will be powered by 3 TLC5940 LED drivers, receiving their instructions from the Arduino. This will then all be put inside of an IKEA lamp, like this:
Should make a nice moodlight. Perhaps even with some lumia effects in it...
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