MD_MAX72xx LED Matrix Arduino Library 3.5
Library to control connected MAX72XX devices as a pixel array
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These modules are commonly available from many suppliers (eg, eBay) at reasonable cost. They are characterized by IN and OUT connectors at the short ends of the rectangular PCB.
C C D G V L S I N c K N D c | | | | | V V V | | D7 D6 D5 D4 D3 D2 D1 D0 +------------------------+ | 7 6 5 4 3 2 1 0 |- DP | 1 |- A | 2 |- B | 3 |- C | O 4 |- D | O O 5 |- E | O O O 6 |- F | O O O O 7 |- G +-----+--+--+--+--+------+ | | | | | V V V | | C C D G V L S O N c K U D c T
Generic modules need to be oriented with the MAX7219 IC at the top and connected using short patch cables in a spiral pattern. The display is oriented with the IC at the top.