This is an 8-digit 7 segment display module from DF Robot. It supports 16-level brightness adjustment and can be driven via two normal I/O ports. The display features 4 different slave addresses, standard I2C pins, compatible with Gravity interface, and free from MCU scanning.
Max7219 LED 8 Digit 7 Segment Display
This 8 Digit Seven Segment Display Module takes advantage of the Maxim MAX7219 driver IC to allow you to driver its 8 seven segment LED’s using just 3 digital pi..
MAX7219 Display Driver
The MAX7219 is a compact, serial input/output common-cathode display driver that interfaces microprocessors (µPs) to 7-segment numeric LED displays of up to 8 digits, bar-graph..