Power Balancing + Power Injection - Double Check

Gooliez

Apprentice elf
Joined
Dec 31, 2025
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51
Location
Spreyton, Tasmania
Hi Guys, Me again.

I'm building a matrix with 1440 pixels. Split in 2 ( 720 per port)

I've connected up 1 part to test how the brightness level @30% sits and clearly there is drop off (12v Pixels)

With Zig Zag configuration it loops back to the same side, so was looking at Power balancing, Which all I do is cut the Data on one side of the inputs. But I'm thinking to put less stress on the PSU, i'll power inject at the 400 pixel mark.

If i run the Positive from the second power supply say 25% each direction from the middle, it should give power to a total of 50% of the pixels,
Negative Runs the full lot.

can you check my Awesome graphic skills and see if what i'm thinking of doing is correct?
 

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Config will work.
On another front, what timing are you planning on using with those pixels?
720 pixels per port will limit the speed you can update the pixels. How much will depend on more factors than I can bring up here, but note that it takes x-milliseconds to update each pixel and multiply that times the number of pixels on the port. If you are running what is current day "slow" refresh rates, I see no problem. If you are going for the higher rates, as in smoother transitions, you may witness some artifacts.

Not saying anything is wrong, just there are tradeoffs for packing your ports.
 
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