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pixels on my house


Steelers95

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I am working on a plan to put pixels on my house next year. After taking many measurements today I have a few questions.  I'm working with ws2811 pixels and a sandevice e682 controller and In order to get the pixels to fit the house correctly I will need to use strings of 55 pixels instead of 50.

 

1) will I need to use power injection if I have a pixel string of 55 pixels that is between 15-16 ft. away from the controller

2) is it possible even with power injection to have a string of 55 pixels that is 25 ft. away from the controller

3) I have been reading up on how to inject power into a string of pixels. if im correct I can use a different power supply than the one that is powering the controller and I can run wire from the v+ and V- on that power supply directly to the 12v and ground on the pixel string. while only running the data and ground wires from the controller, not the 12v. is that a correct way of injecting power or am I 100 percent  wrong.

 Thank you for any help or advice you may have.

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1.  No

2.  you might need null pixels

3.  You can run multiple power supplies.  Data goes straight thru, V+ isolate, V- tie all together.

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Power injection question comes up quite often and I know I do not describe it very good so I drew this up this morning while I was waiting for a meeting to start.

 

PowerInjection_zps7c652e94.jpg

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I may be wrong, but I was told if using multiple power supplies on the same run of pixels, the V- should be tied together on all of the PS's. So which way is it? Is your drawing correct or do the PS's need to be tied together? I may need to do this this year is the reason I'm asking.

 

I don't think they need to be tied if using multiple PS's on different strings, which is the way I did it this year and had no problems.

 

Any electrical gurus that can chime in on this?

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Thanks for taking the time to make a drawing, helps out a lot .

 

Your Welcome.  It did not take very long but there are many different options on how to apply this to draw them all.  I tried to be as generic as possible.

Edited by KStatefan
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I may be wrong, but I was told if using multiple power supplies on the same run of pixels, the V- should be tied together on all of the PS's. So which way is it? Is your drawing correct or do the PS's need to be tied together? I may need to do this this year is the reason I'm asking.

I don't think they need to be tied if using multiple PS's on different strings, which is the way I did it this year and had no problems.

Any electrical gurus that can chime in on this?

It is true, they are tied together in the drawing.

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OK guys, thanks for helping my understanding too. I was told different and that's the only reason I questioned it. I just wanted to know I had it right before I do this. It may be as soon as 2015 and I may not have to do it at all. Thanks for the info.

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Great drawing. I'm going to be doing this for this year. And was wondering how to go about it.

Thanks.

Edited by Cdanna77
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I thought your first explanation was good!

 

Great drawing,

 

 steelers-

I have a 23' run from sandevice to controller with no problems.


correction - sandevice to first pixel

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3 core LED pixel wire I got from china (ray wu I think). It is like 20 gauge, maybe smaller. I can send you a link later if you want.

 

~Matt

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