HUABAN Red Digital Tube LED Display MAX7219 Dot Matrix Module for Arduino Microcontroller 4 in One Display with 5P Line

Instructions: Note: A single module can drive a 8x8 dot matrix common cathode Operating Voltage: 5V Dimensions: 12.8X12.8X1.3cm/ Fixing screws with 64 holes with a diameter 3mm Module with input and output interfaces, support for cascading multiple modules Quality:1Set 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. Thank you!