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rpi-rgb-led-matrix
Controlling up to three chains of 64x64, 32x32, 16x32 or similar RGB LED displays using Raspberry Pi GPIO
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InfluxDB
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Btw, for the PCB, I remember looking into the ColorLight 5A-75 a while back, because I found this project for it: https://github.com/NiklasFauth/colorlight-led-cube and it seemed like it would be a good starting point to modify for my own project.
Here is the project I'm using with RPi: https://github.com/hzeller/rpi-rgb-led-matrix
Rather than designing your own PCB, I suggest that you use a ColorLight 5A-75 LED driver board. These are commercial boards that are designed to drive LED panels. They contains Lattice ECP5 FPGAs and have been completely reverse engineered for hobby use. They are very cheap, around $20 on AliExpress.
I build an LED cube with panels like that and drove them with an FPGA. The GitHub repo with SpinalHDL source code and presentation (without a lot of FPGA specific technical content.