LedControl Library, for connecting many 7 segment or LED displays
LedControl
MAX7219 Led Modulo 8 Bit 7-Segment LED Display per Lampone Pi – AZ-Delivery
Led control library for Arduino MAX7219 downlaod
Interface LED Dot Matrix Display with ESP32 and MAX7219
Matrice LED 8×8 LED con MAX7219 e Arduino - Makerslab Fablab
7セグLED表示 その6 8文字-MAX7219 - Arduinoクックブック
Matrici LED 8x8 con Arduino e MAX7219 - Arduino, esperimenti e progetti in italiano - Sisuino blogArduino, esperimenti e progetti in italiano – Sisuino blog
MAX7219 Led Modulo 8 Bit 7-Segment LED Display per Lampone Pi – AZ-Delivery