SainSmart MAX7219 Red LED Dot Matrix Display Module MCU Control DIY Kit for Arduino

Module parameters: 1.A single module can drive an 8 * 8 common cathode lattice 2.Module Operating voltage: 5V. 3.Module size: 5 cm long X 3.2 cm wide X 1.5 cm high 4.With four screws hole, aperture 3mm, by using our M3 Tongzhu fixed 5.Module with input and output interfaces, supports multiple modules cascade Wiring instructions: 1.The module left as an input port to the output port on the right. 2.The control of a single module, simply input port to the CPU 3.Multiple modules cascade input termination CPU, 2 output termination module, a module of the input of the input terminal, the output terminal of the first two modules of the first three modules, and so on ... 51 MCU, for example: VCC ? 5V GND ? GND DIN ? P22 CS ? P21 CLK ? P20