Piranha RGB LED very uneven

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maxe
 
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Joined: Wed Oct 10, 2012 11:47 am

Piranha RGB LED very uneven

Post by maxe »

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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adafruit_support_bill
 
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Re: Piranha RGB LED very uneven

Post by adafruit_support_bill »

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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maxe
 
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Re: Piranha RGB LED very uneven

Post by maxe »

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

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