Matrix geometry

1

Hello,
I want to build a matrix led on my ceiling of 3m x 2m.
I using the strips SK6812 for it.
LED spacing is 3.5cm for y dimension.
To get a setup that works per default I would need a strip every 3.5cm in x dimension. This would make 60 strips which is too much.
I could skip every second led for the 2d effects and have a strip every 7cm. That would be some waste.

-Is there a possibility to setup matrix geometry?
I need to adjust that the 3.5cm should be interpolated in a way that they for example fit to a 10cm in x direction.
-Is it advisable to have identical spacing for both matrix dimensions? Or would for example 3.5cm / 5cm work, too?

thanks a lot for any advise

2

It is possible to have 85x60 (300/3.5 x 200/3.5) matrix but you will need 6 outputs to get decent FPS.
Each output should drive no more than 700-800 LEDs for optimal performance.

3

But I already have the SK6812 strips.
The QuinLED-Dig-Octa has 8 outputs. That should hopefully be enough

4

So what? They are on compatible list.
There’s nothing wrong with them.

5

i want to build a matrix
the sk6812 has 3.5cm spacing between each led
i do not want a strip every 3.5cm
therefor im searching for an option to tell wled that the 2d setup has no equal spacing in each dimention

6

why does it matter?
Except if you want to display pixel art no effects take into account physical geometry.

7

for example text effecs

8

It does not care of the spacing.

9 
 what ??
10

the only text effect - Scrolling Text
it does not care about physical layout. none of the effects do.

If you are ok to skip every other LED on strip (to achieve the same spacing) then you can create a ledmap that only has every other LED mapped.
but IMO that is wasteful

11

thanks for the keyword, ill give ledmap a try