MAX7219 Point Battage Module LH Control Single-Chip Module 4 In 1 Display With 5P Cable, Specification: Green Light

1. A single module can drive an 8x8 common negative dot matrix
2. Module operating voltage: 5V
3. With 64 fixed screw holes, hole diameter 3mm
4. With input/output interfaces, support multiple modules cascade.
5. 3 IO ports can drive 1 dot matrix, no flicker when displaying.
6. Size: 12.8 x 3.2 x 1.3cm, cable length about 20cm
7. Weight: about 45.2g

Wiring instructions:
1. Left side is input port, right side is output port.
2. When controlling a single module, connect the input port to the CPU.
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.
4. Take 51 microcontroller as an example:
- VCC → 5V
- GND → GND
- DIN → P2.2
- CS → P2.1
- CLK → P2.0