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Johnny 5 and LedWiz
RandyT:
Sound like you are reading an awful lot into your experiments. LED's vary greatly in their output capabilities. Your requirement of using 2 red LEDs for 1 each of green and blue speaks more to the type of LED's you are using than the differences between colors. Decent RGB LED's are tuned to allow one to achieve a fairly convincing "white" with little difficulty.
--- Quote from: Jukeman on October 08, 2006, 03:13:05 pm ---The other thing is you will never generate the other end of the color spectrum which includes black(which is the absence of color). There is three colors that can generate black but these are not made to my knowledge at least not in a led. I know you're saying i thought he just said black was the absence of color but now we are talking about black as being generated as a artists color. If you are making you own lighting you can use tinted acylic(non glare) and put it over the white. Now the great mystery is how does a TV get black?
--- End quote ---
There are no "colors" that can generate black. Black is the total absorption or lack of light. Putting a tinted acrylic cover over a white LED does nothing more than filter out certain wavelengths relative to the specs of the material. If the wavelength isn't there in the LED, or not there in sufficient levels, the tinted cover won't do what you expect it to. If you are talking about dark tinted acrylic to produce "dark" light, then that is just silly.
There is no great mystery as to how "black" is generated on a CRT. The electron beam gun shuts off and the phosphor is not excited so no light is produced.. The quality of the "blacks" you get are based on the shade of the phosphor on the inside of the screen, the tint of the CRT glass, and the amount of ambient light in the room where the CRT is viewed.
--- Quote ---Additive and Subtractive Color
Offset printing, digital printing, paints, plastics, fabric and photographic prints are based on the subtractive system of color (CMY/CMYK) in which cyan, magenta and yellow mix to form black (K).
--- End quote ---
This is just incorrect. (K) is black. No real offset / digital printers use a 3 color process, rather a 4 color process which includes real black ink. Cyan, Magenta and Yellow by themselves just produce a muddy dark gray, which is why inkjet printers which use separate CMY and Black (K) ink cartridges produce vastly superior text and imagery.
Also, this is not precision spectrometry here. If you are trying make an orange light, and of 10 people 9 say the color is "orange" and the tenth says it's a slightly reddish orange, there's good chance you succeeded in making an orange light. Anything beyond that in this application is overkill to the nth degree.
Presets with user defined R, G and B values which are linked to on-screen color icons is probably all anyone would really need.
RandyT
digitaldj:
True that they will generate white but will not generate the color spectrum like it should. I have experimented with every rgb that is available on the market as part of research project for a college term paper.
The tinted acrylic is only to simulate what would be the phosphor of a TV screen and when illuminated with varying brightness of white can produce shades of gray. I never said there was a great mystery to a TV generating black.
Actually commercial printing equipment use more colors to generate the full color spectrum.
Still with CMY it is very close to black and would suffice instead of none. Matter of fact 48 steps of PWM is definately over kill. Generating over 4096 is going to be way more than the human eye can typically see.
Wow! You try to make this all sound so simple which tells me that you lack the knowledge on the subject. Try to tell Color Kinetics(leading L.e.d. Lighting Manufaturer) what their doing is putting way to much effort into their products and see what they tell you.
Besides i was only making reference to my findings and just take from it what you will.
Jukeman
RandyT:
--- Quote from: Jukeman on October 08, 2006, 09:24:53 pm ---Still with CMY it is very close to black and would suffice instead of none at all which your board doesn't seem to be able to do. Matter of fact 48 steps of PWM is definately over kill. Generating over 4096 is going to be way more than the human eye can see.
--- End quote ---
Well, it might be if the LED-Wiz was only designed with LED's in mind. The fact is, it can operate as a 48 level DC motor speed control, or any other application where PWM might be desirable. The fact that it can give you that level of adjusrment with an LED is so much the better. No point in crippling something if you have the capability to make it better.
--- Quote ---Actually commercial printing equipment use more colors to generate the full color spectrum.
--- End quote ---
4 color process is still the standard. Most inkjets don't have the color gamut that commercial offset printers have with their inks and therefore have intermediate colors to fill in the gaps.
--- Quote ---Wow! You try to make this all sound so simple which tells me that you lack the knowledge on the subject.
--- End quote ---
I spent 7 years doing thin film deposition and manufacturing laser optics and another 5 on top of that in glasses-free 3D system design and manufacture. I know a thing or two about "light."
RandyT
digitaldj:
What makes you think i have differences with alot of folks, it seems it's just you? If you are refering to the differences i have with the guys that have Virtual Jukbox software then it speaks for it's self.
I have spent a year working with and developing my own lighting and just wanted to share my findings so if you don't believe them then that is fine. I guess my new employer may be dissapointed in my knowledge(not)we will see. I get to move to the town of sin and work with a lighting company that designs lighting systems used on casinos and corporate buildings all over the world.
Laser is whole different animal and i don't know how you can compare that to L.e.d. lighting.
And like i said 48 steps is way overkill, looks like you need to read alot more about led lighting. As i was going to mention before and took it out of the post that it seems like you have a problem with me and you must feel threatened by what i am doing.
Let's just get back to what the original posts were all about! If you want to brow beat me then do it by email.
Jukeman
arzoo:
--- Quote from: Howard_Casto on October 07, 2006, 12:00:08 am ---well j5 supports a colors.ini, it's just one doesn't exist yet. The idea is to document the colors of the actual buttons used on the arcade machine.
--- End quote ---
Can I create my own colors.ini for a selected set of games?
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