2 32x64 LED matrices connected via GPIO

[Caliga]

Hello there,

For a work project (I work for a web development agency) we've decided to do some experiments with the Raspberry Pi2. One of these experiments which I've gotten the green light to do is a little project involving a 64x64 LED Matrices which can be found here:

http://www.led-card.com/product_info.ph ... cts_id=243

Unfortunately they only do a maximum of 32 x 64, so my hope is to set up two of these running in unison from a Raspberry Pi, controlling them with the GPIO pins.

I'm at a bit of a loss where to begin, I've found tutorials that show how to hook two 32x32 matrices together, and there are some libraries out there to handle the IO, for example: https://github.com/hzeller/rpi-rgb-led-matrix, but they only seem to go up to a certain size.

I believe this type of matrix can be daisy chained together, but I've read a lot of stuff about having to use level shifters (which I admittedly don't understand).

My question to you all is: have you ever done something similar? How best to wire these? Am I out of my mind?

Many thanks!

[davidcoton]

Talk to the supplier. If they don't know how to do it, then either it can't be done, or you shouldn't be buying from them.

[braniac]

Yes it can be done. The 32 x 32 panels can be daisy chained up to 8 in a row and the raspberry pi 2 offers 40 gpio pins which means 3 of those 8 panel rows in parallel without using extra cpu power compared to the old raspberry pi which would only be able to handle one such row. Remember to use comxplayer for your videos. Hope it helps a bit.

[austin77777]

Were you able to get this working? I am looking to use two, possibly three panels chained together but I have no clue how to do it. Any insight would be appreciated. Thanks!

[DougieLawson]

Take a look at the Adafruit LED matrices and software to drive them.
https://learn.adafruit.com/adafruit-rgb ... g-matrices