MAX7219 Dot Matrix Module For Arduino Microcontroller 4-in-1 Display with 5P Lin...

Description Wiring instructions:The left side of the module is the input port, and the right side is the output port.When controlling a single module, only need to connect the input port to the CPU.When multiple modules are cascaded, the input of the first module is connected to the CPU, the output is connected to the input of the second module, the output of the second module is connected to the input of the third module, and so on...Take 51 microcontroller as an example:VCC  →  5VGND  →  GNDDIN  →  P2.2CS   →  P2.1CLK  →  P2.0Shipping list:1. MAX7219 dot matrix module  (finished product, with dot matrix, has been tested)2. 20CM Dupont line 5P