This video explains how a 64x64 RGB LED Matrix work. In the end I show a small project based on ESP8266.

0:00 Project introduction
0:35 RGB Matrix codes
1:26 Connectors
1:47 Workings of a LED Matrix
4:23 ICs on the matrix PCB
6:09 HUB75 connector
7:22 Arduino IDE ESP8266 project

Falstad circuit schematics of LED Matrix:
https://tinyurl.com/yhmkmx7s

Github repository with LED Matrix Date Time project:
https://github.com/marekl123/led-matr...

ESP8266 Github page:
https://github.com/esp8266/Arduino

PxMatrix github page:
https://github.com/2dom/PxMatrix

Link to schematics of a RGB LED Matrix:
https://github.com/esden/led-panel-do...

Datasheet ICN2028AP (A driver IC specially designed for LED display screens):
http://www.88869188.com/uploads/20180...

Datasheet SM5166P (A highly integrated LED drive control chip):
http://www.diyleyuan.com/jc/201C/SM51...

Datasheet 74HC245 (Octal bus tranceiver; 3-state):
https://www.farnell.com/datasheets/75...

Datasheet 74HC138 (3-to-8 line decoder/demultiplexer; inverting):
https://pdf1.alldatasheet.com/datashe...

Music track: Single Lane Tunnel from Nihilore
https://www.nihilore.com/