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I'm tring to build a led display with 32 strips of ws2812b led strips with 60 leds each. That's a total amount of 1920 leds. How many power supplies should I buy? Given the max current of 50mA per leds, that's a 50mA x 60 x 32 = 96A. I'm going to buy to power supplies of 5V 60A (https://www.amazon.it/HAILI-Trasformatore-Adattatore-Alimentazione-Telecamere/dp/B07Y38SMQ3/). What should be the connection of the strips? Should I power every side of each strip? I made a schema:

enter image description here

Do you have any suggestions to connect all these cables with each other? (32 + 32 each side).

The Led strip I'm using is the 1m 60 IP30 + WS2812BECO Black PCB as pictured here: enter image description here

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  • \$\begingroup\$ The ws2812b is not a strip it's an individual RGB LED as far as I remember. You are asking someone to confirm that the cabling arrangement for a power supply with no data sheet connected to some unspecified strips of LEDs is OK. Your expectations may be too high. \$\endgroup\$
    – Andy aka
    Mar 29, 2020 at 18:21
  • \$\begingroup\$ Do not draw a schematic in this case. Rather draw the actual wiring diagram showing how you plan to connect the LEDs. You will need two 60 A supplies. \$\endgroup\$
    – skvery
    Mar 29, 2020 at 18:24
  • \$\begingroup\$ Your are right, the LEDs are connected as pictured in the red box. There are 60 leds on each strip. \$\endgroup\$
    – Diego Braga
    Mar 29, 2020 at 18:38
  • \$\begingroup\$ How far apart will the strips be placed? 60 leds/m = 18 watt/meter that's 300 mW per LED+driver - 10 mA for each driver? Anyway: 18 W * 32 = 576 W (cooling?) - 115.2 A. \$\endgroup\$
    – greybeard
    Jul 31 at 4:31

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The wiring of the power depends on the layout of the strips, if they are connected exactly like in the image, i would switch build a ring supply (powering both sides of the strips.

Please be aware of the following:

  • 5V, 96A is no joke in terms of security. If the wires touch, there will be a huge arc.
  • 5V 96A requires large wire (like 25mm2)
  • Each strip of 60 LED's requires 3.6A, check if the strips are made for this current
  • Check if its possible to drive 1920 led from one data pin. Shifting out data for 1920 led is around 76.8k bits of data
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    \$\begingroup\$ 5V, 96A is no joke in terms of security. If the wires touch, there will be a huge arc. --> Another solution would be buy 10 power supply that provide 5V 10A if it's more safe; Each strip of 60 LED's requires 3.6A, check if the strips are made for this current --> from the vendor, I can see that 60 leds/m = 18 watt/meter; Check if its possible to drive 1920 led from one data pin. Shifting out data for 1920 led is around 76.8k bits of data --> Raspberry Pi Zero W has 512MB of RAM, I'll check how much memory is available \$\endgroup\$
    – Diego Braga
    Mar 29, 2020 at 19:22
  • \$\begingroup\$ @DiegoBraga how fast do you want/need to update the LEDs? It’s not a matter of memory (this is insignificant) but speed of the data link to the LEDs. \$\endgroup\$
    – jcaron
    Mar 29, 2020 at 21:37
  • \$\begingroup\$ @jcaron I want it to be really fast. I checked yesterday and the free memory on the Raspberry Pi Zero was 44MB, so pretty much space for the shifting data. What I'm concern is the connection of the 2 power units in the diagram I've attached: should I connected each side of the strip for both positive and negative lines? or should I attach just the input side for the positive line? \$\endgroup\$
    – Diego Braga
    Mar 30, 2020 at 7:29

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