Helix Posted February 1, 2008 Report Share Posted February 1, 2008 Hello there! I'm new to this forum but very interested in building a MIDIbox SID and I was wondering if there was any way to implement a 3colored LED in some way? Like this one: http://www.kjell.com/content/templates/shop_main_details.aspx?item=90540&path=69800000,71600000,71630000It would be totally kick ass to have 8 different LEDs that shines according to the soundvolume of each chip. Blue for low volume, yellow for medium and red for max. Quote Link to comment Share on other sites More sharing options...
Screaming_Rabbit Posted February 2, 2008 Report Share Posted February 2, 2008 ... no problem. You just connect them like 3 individual LEDs except that they have a "common"-connection on one end.Why 3 colours? You can mix them:- red & blue = magenta- green & Blue = cyan- red & green = yellow... that gives you 6 colours.It just needs some testing with the resistors... specially red & green, if you don't want a dirty or even brownish yellow.Greets, Roger Quote Link to comment Share on other sites More sharing options...
Helix Posted February 2, 2008 Author Report Share Posted February 2, 2008 Yeah, thought of that too. One would be able to have the whole spectrum of colours. The good thing is that they wont be brown or anything like that. Colours work that way when you mix paint, if you mix them all the cocktail becomes black. But when you add different colours of light they subtract and become brighter. So if you add all the colours you will get a white light. I guess ill have to experiment alot. But they are pretty expensive 5€ a piece from kjell.com. I bet they can be found cheaper elsewhere. Quote Link to comment Share on other sites More sharing options...
cimo Posted February 2, 2008 Report Share Posted February 2, 2008 i got mine here:http://www.ledtuning.nl/catalog/index.php?cPath=46&osCsid=d7b49db6c4b020ab95fe23bc314e8ab8 Quote Link to comment Share on other sites More sharing options...
Screaming_Rabbit Posted February 2, 2008 Report Share Posted February 2, 2008 One would be able to have the whole spectrum of colours.Using the full spectrum only makes sense to display e.g. intensity of a parameter. If you want to display the state of function, 6 colours are enough by far. - More colours are nothing more than confusing.Greats,Roger Quote Link to comment Share on other sites More sharing options...
nebula Posted February 4, 2008 Report Share Posted February 4, 2008 I got mine here:http://stores.ebay.com/Light-of-Victory-Led-Store-lvehk_W0QQ_trksidZp284Q2em158QQfrsrcZ1QQfsubZ14057638QQtZkm Quote Link to comment Share on other sites More sharing options...
Helix Posted February 4, 2008 Author Report Share Posted February 4, 2008 Yeah, thanks for all the replies. I haven't found any midibox that has multicolored leds, is there anyone here that has actually done it? Quote Link to comment Share on other sites More sharing options...
nebula Posted February 5, 2008 Report Share Posted February 5, 2008 If you're considering making an 8-SID MIDIbox, I don't think this of all things should be stopping you.If you want to indicate the volume with a multicolor LED, just use an LM3915 IC (try searching google for "LM3915 VU meter") on the output of each SID. It costs about $2.50, so 8 of them would be about 20 bucks. Add it to the cost of a hand full of RGB LEDs and a few support parts, and you could do exactly what you are suggesting. Quote Link to comment Share on other sites More sharing options...
levon Posted February 9, 2008 Report Share Posted February 9, 2008 Using the full spectrum only makes sense to display e.g. intensity of a parameter. If you want to display the state of function, 6 colours are enough by far. - More colours are nothing more than confusing.Greats,RogerThe other problem is the DOUT is binary, so you could only turn each RGB LED on or off, making 7 colours (including white) to have it show the full range you would need to connect it to an AOUT Quote Link to comment Share on other sites More sharing options...
nILS Posted February 9, 2008 Report Share Posted February 9, 2008 to have it show the full range you would need to connect it to an AOUT...which is a horrible idea ;-) Quote Link to comment Share on other sites More sharing options...
cimo Posted February 10, 2008 Report Share Posted February 10, 2008 Quote from: Screaming_Rabbit on 2008-02-02 at 18:59Quote from: Helix on 2008-02-02 at 12:58One would be able to have the whole spectrum of colours.Using the full spectrum only makes sense to display e.g. intensity of a parameter. If you want to display the state of function, 6 colours are enough by far. - More colours are nothing more than confusing.Greats,RogerThe other problem is the DOUT is binary, so you could only turn each RGB LED on or off, making 7 colours (including white) to have it show the full range you would need to connect it to an AOUTlevon if you want to dim a led you can just strobe the DIN. Quote Link to comment Share on other sites More sharing options...
levon Posted February 10, 2008 Report Share Posted February 10, 2008 Right... thats a much better idea.... keep in mind that i replied at 5:30 in the morning... :P Quote Link to comment Share on other sites More sharing options...
Screaming_Rabbit Posted February 10, 2008 Report Share Posted February 10, 2008 levon if you want to dim a led you can just strobe the DIN.... it was early in the morning for CIMO too ;)I would put a PWM on the DOUTGreets, Roger Quote Link to comment Share on other sites More sharing options...
/tilted/ Posted February 10, 2008 Report Share Posted February 10, 2008 you could do something just like what you mention using a combination of a LM3915 dot/bar driver and a 8 to 3 encoder chip.the LM3915 takes one of 10 outputs low in response to signal level, so you'll need to invert them to drive the encoder.these could then be fed into an 8-to-3 encoder chip, with the output used to drive the LED directly.ie Q(0) to Red, Q(1) to Green, Q(2) to Blue on your LED.you could then choose which order your colours should go.say your LED glows blue at low levels, through green/yellow at middle levels, etc:[tt]out 10 (max) - input (7) = 111 = All cells on = Whiteout 9 - input (1) = 001 = Red cell aloneout 8 - input (3) = 011 = Red+Green = Yellowout 7 - input (2) = 010 = Green cell aloneout 6 - input (6) = 110 = Green+Blue = Cyanout 5 - input (4) = 100 = Blue cell aloneout 4 - input (5) = 101 = Red+Blue = Magentaout 1-3 OR'd - input (0) = 000 = All cells off[/tt]Edit: I've just realised that this all assumes a common cathode LED, and yours is common anode. No big issue, just patch as follows:[tt]out 10 (max) - input (0) = 000 = All cells on = Whiteout 9 - input (6) = 110 = Red cell aloneout 8 - input (4) = 100 = Red+Green = Yellowout 7 - input (5) = 101 = Green cell aloneout 6 - input (1) = 001 = Green+Blue = Cyanout 5 - input (3) = 011 = Blue cell aloneout 4 - input (2) = 010 = Red+Blue = Magentaout 1-3 OR'd - input (7) = 111 = All cells off[/tt] Quote Link to comment Share on other sites More sharing options...
cimo Posted February 10, 2008 Report Share Posted February 10, 2008 Quote from: cimo on Today at 01:43levon if you want to dim a led you can just strobe the DIN.... it was early in the morning for CIMO too WinkI would put a PWM on the DOUTGreets, Rogerehe Roger, it was late night.. when i went to bed, just before falling asleep i figured out that i wrote DIN instead of DOUT but i was already too sleepy to go downstair and correct it, so i said to myself "let s try to guess who s gonna correct my post first" i thought about S1 and eventually Seppoman so it was not a good guess. ;)simone Quote Link to comment Share on other sites More sharing options...
stryd_one Posted February 11, 2008 Report Share Posted February 11, 2008 so i said to myself "let s try to guess who s gonna correct my post first" i thought about S1...Hahaha I've only just now read this thread :)BTW, Sorry for the flood of replies... I'm catching up on lost time... only 16 pages to go... can't you guys type slower?! ;D Quote Link to comment Share on other sites More sharing options...
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