MAX7219 Dot led matrix module MCU control LED Display module for Arduino

Features:
    - Module with input and output interfaces, supports multiple modules cascade
    - A single module can drive an 8 x 8 common cathode lattice
    - With four screws hole, aperture 3mm, by using our M3 Tongzhu fixed
    Module Operating Voltage: 5V
    Led Color: Red
    Module Size: 50 x 32 x 15mm / 2 x 1.3 x 0.6inch
    Product Weight: 12g / 0.4oz
    Wiring instructions:
    1.The module left as an input port to the output port on the right.
    2.The control of a single module, simply input port to the CPU
    3.Multiple modules cascade input termination CPU, 2 output termination module, a module of the input of the input terminal, the output terminal of the first two modules of the first three modules, etc.
    51 MCU, for example:
    - VCC: 5V
    - GND: GND
    - DIN: P22
    - CS: P21
    - CLK: P20

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