TRUSTECH MAX7219 Red LED Dot Matrix Display Module MCU Control DIY Kit for Ar-duino Electronic Components Electronic Hobby Kit

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.