Red Green & Blue LED head from a stage light for enlarger light source.

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Originally Posted by ic-racer

It would be great if you posted you schematic when you get that far.

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I can certainly do that although I don't usually bother for things like this. I just go straight from idea in my head to prototyping strip board.

I don't usually draw the circuit untill I get it working.

I think I must have been a nightmare at college too because of this and I would never write a flowchart for a program until I had got the program working.


Steve.

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Originally Posted by Struan Gray

'scuse me if I'm teaching you to suck eggs, but since the red LEDs are in-place already, you might want to have the option to have red-only light too.

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Not a bad idea. I don't have one of those swing under the lens red filters on my enlarger but sometimes I wish I did as I might want to check something after I have put the paper in the easel or I may have accidently moved the easel in placing the paper and I need to see the image to put it back in place.


Steve.

Guys, I'm extremely interested in this, and have puzzzled over it for months - but I lack the enviable electronics skills that several of you appear have. If you crack it, PLEASE would you post a layman's guide (I can solder up a circuit if I know what to buy), or else consider selling a unit to a mere mortal!

This site has good docs on spectral response of their LEDS:

http://www.superbrightleds.com/led_prods.htm

EDIT: They also have good links in their site. Here is a tutorial on mixing RGB LED light sources:

http://members.misty.com/don/ledrgb2w.html

this too!:

http://www.huws.org.uk/

And then it stopped....

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Originally Posted by Robbedoes

And then it stopped....

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Not here. I'm still using mine.


Steve.