Hello,
I am currently busy with building a large matrix bord of 4 panels with each 480 LEDS (total 1920LEDS). Every panel will have his own power supply contected to it. The matrix is controlled with an ESP32 using 4 pins (one pin for every panel).
I have 4 power supplys of each 10 AMP and want to do the wiring as follow. I was wondering if it is neceassry to connect the grounds with each other?
Thanks in advance for your help,
Greetings
All grounds must be common (connected together).
not only does GND need to be common, but you need one ground per data wire if the wires are longer than like 30cm. And dont forget to add a levelshifter.
you can get a full Panell overall as you use the MAPPING function in WLED
so you got the full row width
this also is in action if you sent Data over the Protocols
just map the intirer matrix to the preset ZERO
When i configure my 2d matrix panel the peek function is not working. Does anybody have an idea?
Peek shows only 30 by 16 matrix?
In 2D mode it won’t show all individual leds, only the overall look with fixed size dots as it’d be way too intensive to show everything.
Yeah we have noticed that before so that is a known issue , if you go beyond 32x32 ( this is really the recommended limit even from stability point of view as per the main wled dev ) then peek will be messed up . I have not personally built anything more then 32x32 with wled for that reason but if the fixture is working correctly then at least its a bit of good news . Something like that was posted on github so you could also file a bug report ,I do not think this is a priority so it would be back burner but I could be wrong and you might get a positive response .
thanks for the reply, now i know that it does not have anything to do with my setup. I just found the earlier github discussion. When the bord is finished i will post an photo of it. Thanks.
@dedehai, what do you exactly mean?I connected all the GND together at the power supplies, do i also need to connect them at the end of each dataline (so connect the white line after pixel 480 to the next line connected to the next power supply?). I use databoosters of quinled.
The first 8 lines are connected tot the first power supply and are working without flickering. Line 9 is the first line connected to the second powersupply and flickering. Is this because the white ground are not connected at the end?
Basically you want all the power supply grounds connected together, and if you have long data lines and/or long power supply wires and have issues there should be a ground line going from the esp to the panel together with the data line so the ground path doesn’t have to go all the way to the PSU and then to the panel through connections that carry a lot of current and thus introduce some voltage drop.
