Open GeorgeFlorian opened 4 years ago
did you ever figure this out? i'm trying to create a chain of 12 panels in a 3 rows x 4 columns configuration with 32x64 panels. i read something about an "s-mapper", but i'm also reading that "parallel" only works with the chip board that has 3 outputs. i'm using an adafruit hat, so i need to run everything off of 1 continuous chain of 12. thanks!
you want to run them parallel using one of the parallel adapters, the single chain adafruit hat will result in too low of a refresh rate for 12 panels. You can test the expected refresh rate by running the program with the necessary options and outputting the refresh rate.
i actually am running all 12 at once right now, and don't see too much of a refresh rate issue. i'm just using it for a MM:SS timer for a kids running series, and maybe to scroll a few announcements. i snaked them as shown above, basically:
'<<<< - pi4 '>>>> '<<<<
i'm just not sure how to get it to read the panels in the correct way with the mapping. where can i find an adapter? does it take the place of the adafruit hat on the 40 pins? thanks!
This is a quick video with the image scroller. I have some flicker, and I'm planning to write the two leads together I saw mentioned in another post.
On Fri, Mar 6, 2020, 5:25 PM Henner Zeller notifications@github.com wrote:
you want to run them parallel using one of the parallel adapters, the single chain adafruit hat will result in too low of a refresh rate for 12 panels. You can test the expected refresh rate by running the program with the necessary options and outputting the refresh rate.
— You are receiving this because you commented. Reply to this email directly, view it on GitHub https://github.com/hzeller/rpi-rgb-led-matrix/issues/904?email_source=notifications&email_token=AGJKW7XTQOSAXM6RHVYAWWLRGFZ7BA5CNFSM4I5OGFL2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEODBUPA#issuecomment-595991100, or unsubscribe https://github.com/notifications/unsubscribe-auth/AGJKW7SLWXWAAUR3KH7TY7TRGFZ7BANCNFSM4I5OGFLQ .
Check out the page that describes the adapters https://github.com/hzeller/rpi-rgb-led-matrix/tree/master/adapter There is also a 3rd party provider that sells fully built 3 chain connectors for about $3.
is there a way to create an S-mapper with the adafruit hat? i'm willing to give it a shot and see how the display looks before venturing to a separate board.
sorry to be persistent, but is there a way to do this without the adapter if i'm okay with the low refresh rate? i just need to invert those middle 4 panels. thanks!
Hello !
I have a project that involves a big display, composed of 5x10 panels.
I would like to know if I can do this with only one RPI 4 and, since 50/3=16.6, what should the
chain_length
value should be ?I am confused by the U-Mapper scheme.
Considering that the panels are pointing UP and looking at the back of the panels, the Input is on the left-side and the output is on the right-side. So, turning them around and looking at them from the front, the input will be on the right-side. As such, a chain will should like this:
Looking from the front:
First and second chain should have 20 panels each and the third one 10. I will use
pixel_mapper_config = "U-mapper";
andparallel = 2
. But what should I write atchain_length
?I will be using an active adapter.
The cables from a row's first panel to the adapter's connector will be very long. I have read something you wrote in a thread:
But I don't understand what you mean.
What do you think ?
Thank you !