HiLetgo 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 three termination modules, and so on... ?51 microcontrollers, for example: VCC 5V GND GND DIN P2.2 CS P2.1 CLK P2.0 ?Size for manual measurement, there may be a 0 to 2 cm error, belongs to the normal phenomenon. ?And due to the difference between different monitors, the picture may not reflect the actual color of the item. Package list: ?1x MAX7219 Dot Matrix Module 4-in-1 ?1x 20cm DuPont line 5pin