0
\$\begingroup\$

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

\$\endgroup\$
  • \$\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 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 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 at 18:38
0
\$\begingroup\$

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
| improve this answer | |
\$\endgroup\$
  • 1
    \$\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 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 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 at 7:29

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.