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See: http://www.instructables.com/id/Star-Map/step16/Se...I used the transistor for brightness control - when the amount of current flowing through the gate is limited, the amount of current flowing through the main part of the transistor is limited as well.Limiting the current means that the LEDs run at a lower brightness than (for my LEDs) "blinding".You could build a test circuit similar to the one in that step, to demonstrate the concept for yourself.
I didn't think of that, they all come to the same trunk. I also wanted to ask, why do you use a transistor ? Wouldn't that work the same without it ?Thanks for your great project :-)
Awesome! :-)I hope the three sizes of fibres works well for you. If you can, best to terminate each fibre size to a different light source. That way the relative brightnesses can be adjusted to what you want.
I'm trying to build this up as well. I'm following what you did except I'm using 3 different sizes of optical fibers. Maybe I just went crazy and it won't make any differences but I thought I'd give a try. You can see on the pictures I posted that I'm using 5 (3 fiber sizes + 2 LED sizes) different colors to categorize the stars from fainter to brighter.I'll continue my build and send pics along :-)
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I pulled it from the software you suggested but as to what it is I really just took a screen shot and went from there. Not really sure which one it is.
I put it from the software you pointed me to. As to which one I have no idea.
I still have to paint the frame but here it is. For anyone using arduino on this project, I had to set the LED values at 5 so they were barely on. I'm guessing it would have been better (dimmer) to use the acrylic rods but I went for five 3mm leds and one 5mm led flush mounted.
HI! I was looking around for christmas trees and I was wondering if a christmas tree that changes color works fine as well?
Amazing idea. I am making a small one for my wife. I am only using the ufo lamp and 6 led for the bigger star powered by an arduino to make them twinkle. I will post picture when I am finished. Thank you.
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