[Arduino_Uno/atmega328p/LED_matrix_MAX72xx]

LED matrix MAX7211 

   matriz_led.ino
  
   Exemplo PONG
   Livro Arduino Básico de Michael McRoberts
matriz_led.ino

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[Arduino_Uno/atmega328p/LED_matrix_scroll]

LED matrix MAX7211 scroll 

   Ticker.ino
  
   Max72xxPanel library example
Ticker.ino

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[ESP32_DevKitC/ESP32/SpiMaster]

ESP32 SPI Master 

Learn how to use the ESP32 SPI peripheral with the ESP-IDF in 
this article. SPI instances and the APIs needed to interact 
with them will be covered. You will create a project that 
uses SPI to operate a MAX7219 module with an 8×8 LED matrix.

Source code

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