MAX7219 Dot Matrix Module Microcontroller Module 4 in 1 Display

Four 8x8 matrices joined on one board, giving a 32 by 8 pixel display long enough to show readable scrolling text. This is the module behind message boards, clocks and ticker displays. All four sections chain internally, so it still uses only three Arduino pins, and further modules connect end to end for longer displays. The MD_MAX72XX and Parola libraries handle scrolling and text effects for you. 32x8 pixels, long enough for readable scrolling text; Still only three Arduino pins for all four matrices; Chains end to end for longer message boards; Parola library provides ready-made scrolling effects