Livegrid: LED Matrices Made Easy
Briefly

Being mass-produced hardware, they are quite robust and can be procured for relatively cheap from Aliexpress or with markup from Adafruit or similar DIY brands.
But since the tech behind these panels is constantly evolving and the Chinese suppliers are famously bad at communication, you will often end up with panels that don't behave precisely as you imagined.
Read at CreativeApplications.Net
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