ALAMSCN MAX7219 Dot Matrix Module 8x8 LED Display Modules for Arduino Raspberry Pi Microcontroller with 5Pin Wires Red -Pack of 4-

Features: 1.10MHz Serial Interface 2. Individual LED Segment Control 3. Decode/No-Decode Digit Selection 4. 150µA Low-Power Shutdown (Data Retained) 5. Digital and Analog Brightness Control 6. Display Blanked on Power-Up 7. Drive Common-Cathode LED Display Parameters: 1. A single module can drive a total of 8 * 8 dot matrix overcast 2. Working voltage: 5V 4. With 4 fixing screw holes, diameter 3mm 5. module with input and output interfaces, support for cascading multiple modules Applications: Bar-Graph Displays 7-Segment Displays Industrial Controllers Panel Meters LED Matrix Displays Wiring instructions: 1. The left side of the module as an input port, an output port on the right. 2. If a single control module, simply input port connected to CPU 3. cascading multiple modules, input and output termination CPU, input the output end of the second module of the first module, the first two modules of the first three input termination module, and so on.  51 microcontrollers, for example: VCC ? 5V GND ? GND DIN ? P2.2 CS ? P2.1 CLK ? P2.0 Package included: 4x MAX7219 8x8 LED Matrix Module (Red) 4x Dupont line 5Pin