MAX7219 dot matrix module microcontroller module 4 in one display MAX7219 dot matrix module microcontroller module 4 in one disp
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Black
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Wiring instructions:
1. The left side of the module is the input port, and the right side is the output port.
2. When controlling a single module, you only need to connect the input port to the CPU.
3. When multiple modules are cascaded, the input terminal of one module is connected to the CPU, the output terminal is connected to the inp