HiLetgo MAX7219 Dot Matrix Module for Arduino Microcontroller 4 in 1 Display with 5pin Line sold2024 Ink cartridges not included for

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HiLetgo MAX7219 Dot Matrix Module for Arduino Microcontroller 4 in 1 Display with 5pin Line sold2024 Ink cartridges not included forHiLetgo MAX7219 Dot Matrix Module for Arduino Microcontroller 4 in 1 Display with 5pin Line Wiring instructions: The left side of the module to the input port, the right to an output port When the control of a single module, simply input port connected to CPU When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the