Description:

• The MAX7219 8 × 8 Dot Matrix Mini LED Display Module is based on the MAX7219 compact chip, it is a serial input common cathode driver that provides the interface between micro-controllers and dies OF THE.
• All common microcontrollers can be connected to this module using a 4-wire serial interface.
• Each output can be addressed without refreshing the entire display.
• This module only requires 3 lines of I / O to drive the display, making it ideal for your microcontroller projects.
• It is easy to use and compatible with Arduino systems.
• LED brightness adjustment can be implemented in software.
• Modules can be chained on a serial interface to increase the display size according to your needs.

Characteristics:

• Operating voltage: 4.7V – 5.3V
• Typical voltage 5V
• Operating current: 320mA
• Max.operating current 500mA LED
• Color: RGB (red, green, blue)
• Module Size: 5cm long X 3.2cm wide X 1.5cm high PCB
• Dimensions: 1.26 ” x 2.0 ”
• Operating temperature: 0 to 50 C

Description of pins:

• CLK: serial clock input.
• CS: chip selection input.
• DIN: serial data input.
• DOUT: serial data output.
• VCC: Positive supply voltage. Connect to + 5V.
• GND: Earth

Example :