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MAX7219 Dot Matrix Module 8 Dot Matrix Electronic Display Module 8 in 1 Display Module SCM Control Drive LED Module for Arduino Microcontroller 8*1 hidden our prabiotic and probiotic supplementsMAX7219 Dot Matrix Module 8 Dot Matrix Electronic Display Module 8 in 1 Display Module SCM Control Drive LED Module for Arduino Microcontroller Product Features MAX7219 is an integrated serial I O common cathode display driver that connects a microprocessor to an 8 digit 7 segment digital LED display, or to a line graph display or 64 separate LEDs A single module can drive an 8*8 dot matrix common cathode. An external register is used to set the