Piranha RGB LED very uneven
Moderators: adafruit_support_bill, adafruit

Piranha RGB LED very uneven

by maxe on Wed Nov 21, 2012 9:39 pm

Any tips for getting the output of the piranha to be very diffused? I can't get a nice warm white out of it for the life of me. I have put it inside a ping-pong ball and the surface of the ball is very discretely colored when all channels are at full brightness. I get one quadrant that is primarily green and blue, and a full hemi that is mostly red. This effect is most pronounced at the limits of the angular range, but even at 20 degrees I can really see a lot of color separation... Are there other LEDs that are better at producing an even mix across a wider angular range=?

Thoughts?
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Re: Piranha RGB LED very uneven

by adafruit_support_bill on Thu Nov 22, 2012 6:50 am

All RGB leds exhibit this property to some degree. It is less obvious in the diffused packaged ones: https://www.adafruit.com/products/159

I've had some luck diffusing the output from a water-clear packaged led by scuffing the surface with a scotch-brite pad.
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Re: Piranha RGB LED very uneven

by maxe on Fri Nov 30, 2012 11:33 pm

A bit of fine grit sandpaper worked very well... Thanks for the tip!
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