Item Type: Dot Matrix Control Module_x000D_ Material: Synthetic Cardboard_x000D_ A single module can drive an 8 x 8 common negative dot matrix_x000D_ Module Working Voltage: DC5V_x000D_ Fixing Screw Holes: 64_x000D_ Hole Diameter: Approx.3mm / 0.1in_x000D_ Wiring Instructions: _x000D_ 1. The left side of the module is the input port, and the right side is the output port._x000D_ 2. When controlling a single module, only need to connect the input port to the CPU_x000D_ 3. 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. .._x000D_ Take 51 Microcontroller as Example: _x000D_ VCC 5V_x000D_ GND GND_x000D_ DIN P2.2_x000D_ CS P2.1_x000D_ CLK P2.0