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Waveshare 8 x 8 Red Dot Matrix LED Module for Raspberry Pi B / B + - Black + White + Green
Can connect to Raspberry Pi B / B+ directly; Drive chip: MAX7219; Dot matrix: 8 x 8 common cathode red dot; With interfaces of power (3.3V / 5V)£¬ data input£¬ clock£¬ GND and NC£¬ etc.