other | MAX7219 Dot Matrix Module For Arduino Microcontroller 4 In One Display with 5P Line

Only 3 IO ports are needed to drive 1 dot matrix! There is no flicker during dot matrix display! Support cascading!Module parameters:1. A single module can drive an 8*8 common cathode dot matrix2. Module working voltage: 5V3. Module size: Length 12.8 cm X width 3.2 cm X height 1.3 cm4. The module has input and output interfaces, supporting multiple modules cascadingWiring instructions:1. The left side of the module is the input port, and the right side is the output port.2. When controlling a single module, you only need to connect the input port to the CPU3. When multiple modules are cascaded, the input terminal of the first module is connected to the CPU, the output terminal is connected to the input terminal of the second module, the output terminal of the second module is connected to the input terminal of the third module, and so on...