8-Digit 7 Segment LED Display
MAX7219 digital display control module can be used for Arduino.
Compatible with 5V and 3.3V microcontrollers (51/AVR/STM32, etc).
MAX7219 is an integrated serial input / output common-cathode display driver, which connects your microprocessor to a 7-segment digital LED display with 8 digits.
Only three ΙΟ ports are used to drive the eight digit display. ΜΑΧ7219 supports flicker free displays as well as cascading displays.