Pink Pixels

Phil Spitler

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Apr 6, 2015, 9:45:31 PM4/6/15

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Hey LED peeps. I am having an issue with an installation where a lot of my pixels are coming out pink.

I also have some mismatched strips as you can see from the photo. I could add a blue tint in my app to neutralize the pink bout would love to know whey they are pink.

The strips are APA102 and I am feeding 5v to both ends of the strip to avoid voltage drop.

In this photo I am displaying grey pixels !!!

Cheers.

Phil

Anton Kast

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Apr 6, 2015, 9:49:49 PM4/6/15

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Still looks to me like voltage drop.

Try running an 18 gauge wire directly to the center. Any change? What's your power source?

Anton

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Phil Spitler

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Apr 6, 2015, 9:55:22 PM4/6/15

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The power source is a 40a 5v Meanwell PSU.

The 2 lighter panels have RGB LEDs and the darker are RBG (or the other way round).

Each panel has it's own PSU and it's own controller (PixelPusher)

Phil

On Apr 6, 2015, at 6:49 PM, Anton Kast wrote:

Still looks to me like voltage drop.
Try running an 18 gauge wire directly to the center. Any change? What's your power source?
Anton

On Apr 6, 2015 6:45 PM, "Phil Spitler" <ph...@bonfirelabs.com> wrote:

Hey LED peeps. I am having an issue with an installation where a lot of my pixels are coming out pink.

I also have some mismatched strips as you can see from the photo. I could add a blue tint in my app to neutralize the pink bout would love to know whey they are pink.

The strips are APA102 and I am feeding 5v to both ends of the strip to avoid voltage drop.

In this photo I am displaying grey pixels !!!

Cheers.

Phil

Phil Spitler | Creative Technologist | Bonfire Labs | t : 415.394.8200 m : 415.571.3139

Website | Facebook | LinkedIn

<2015-04-06 15.28.51.jpeg>

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Phil Spitler

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Apr 7, 2015, 4:07:10 PM4/7/15

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I'm going back in to test tomorrow.

Any other tests that people think are worth trying?

I plan on inject 5v to the center and both ends of a strip and disconnect existing power.

I might try to hook up an Arduino to using FastLED library to send grey to the strip.

Anything else to figure out the pink issue?

Cheers.

Phil

Phil Spitler | Creative Technologist | Bonfire Labs | t : 415.394.8200 m : 415.571.3139

Website | Facebook | LinkedIn

On Apr 6, 2015, at 6:49 PM, Anton Kast <anto...@gmail.com> wrote:

Still looks to me like voltage drop.

Try running an 18 gauge wire directly to the center. Any change? What's your power source?

Anton

On Apr 6, 2015 6:45 PM, "Phil Spitler" <ph...@bonfirelabs.com> wrote:

Hey LED peeps. I am having an issue with an installation where a lot of my pixels are coming out pink.

I also have some mismatched strips as you can see from the photo. I could add a blue tint in my app to neutralize the pink bout would love to know whey they are pink.

The strips are APA102 and I am feeding 5v to both ends of the strip to avoid voltage drop.

In this photo I am displaying grey pixels !!!

Cheers.

Phil

Phil Spitler | Creative Technologist | Bonfire Labs | t : 415.394.8200 m : 415.571.3139

Website | Facebook | LinkedIn

<2015-04-06 15.28.51.jpeg>

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Phil Spitler

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Apr 8, 2015, 7:00:44 PM4/8/15

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We injected power into 3 places on the strip and that really helped.

Hopefully that will do the trick once we apply the same method to all our strips.

Cheers.

Phil

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