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How do I build a Circut to create temperature changes in LEDs? Looking for a range of 3000 to 6,000 for photography? Answered

I see commercial lights for photography that can change color in the range of 3-6,000 or tungsten to daylight values. These are not arrays of three RGB lights but rather single LEDs and the combination create fairly substantial light sources.  Looking for a schematic for some sort of regulator.  Thanks
Nathan
nathan@cityviewmag.com

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Jonathanrjpereira
Jonathanrjpereira

5 years ago

Are they single RGB LEDs?..each individual led contains three individual red,blue, and green LEDs. If so, you use PWM to control the intensity of the R G B leads individually to create any color you want. Search for "PWM led drivers" Maybe include "high current" as well if you will have a lot of LEDS.

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Downunder35m
Downunder35m

5 years ago

You can not change the color of a LED.
You can only use multiple LED's of different colors and mix them through PWM signals.
On a cheap scale I have seen people using ultra bright, white LED's with a normal incandescent bulb in the center.
By adjusting the voltages they change the light color - but also the intensity of course.

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verence
verence

5 years ago

The light 'colour'/temperature of an LED can not be changed. (Okay, you can increase the voltage and a green LED will light up orange ... for a short time, that is)

You could use RGB LEDs, but those are rather expensive and produce a crappy white.

Maybe what this guy did is something for you. He uses a combination of cold and warm white LEDs to create a range of light temperatures.

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steveastrouk
steveastrouk

5 years ago

They're still RGB's for a bet, only in one package.

How bright are they ? Also what distribution ?