Product Review

Instruction of Wiring:
The left side of the module to the input port, the right to the output port
When control a single module, simply connect the input port to CPU
When multiple modules are cascaded, input port of the first module connects to CPU, its output port to the input port of the second module, and the output port of the second module to the input port of the third module, and so on.
Take 51 microcontrollers for example:
VCC→ 5V
GND→ GND
DIN→ P2.2
CS→ P2.1
CLK→ P2.0

Package Includes:
1x MAX7219 Dot Matrix Module
1x 20cm 5P Dupont line