MAX7219 8×8 Dot Matrix LED Module

Description

Features:
Can drive an 8 * 8 common cathode dot matrix
Operating voltage: 5V
Dimension: 5×3.2×1.5cm (LxWxH)
With four screws holes, aperture 3mm
Has input and output interfaces, supporting multiple modules cascade
Led colour: Red

Wiring instructions:
Input port in the left side, output port on the right side While controlling a single 
module,  
put the input port to the CPUMultiple modules cascade
For example,51 MCU:VCC → 5V GND → GND DIN → P22 CS → P21 CLK → P20

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