MAX7219 4 In 1 / 8x8 LED Dot Matrix Display Module for Arduino

1) Driver Chip: MAX7219

2) Input Voltage: 3.7 to 5.3 V

3) Input Current: 320 mA

4) Display Dimensions: 32x32x6 (LxWxH) mm

5) PCB Dimensions: 128×32 (LxW) mm

Integrated serial input/output common cathode display driver, connects the microprocessor with an 8-digit 7-segment digital LED display, or it can be connected to a bar graph display or 64 independent LED. Includes an on-chip B-type BCD encoder, multi-scan circuit, segment word drive, but also a 8x8 static RAM used to store each data, only one external register is used to set the segment current for each LED. Four-wire serial interface can be connected to all common microprocessors, and each data can be addressed at the time of updating without having to rewrite all the displays. Allows to select or not code for each data, 150μA low power shutdown mode: analog and digital brightness control, a scan limit register allows to display 1-8 bits data, and test mode: for all LEDs to emit light. To drive a dot matrix just needs three IO, the dot matrix displays without flicker, support cascade.

Pin Connection

Dot LED Module to the Arduino

Vcc      –     5V

GND   –    GND

DIN    –    Pin 12

CS       –    Pin 10

CLK    –    Pin 11

Size: Approx. 12.8×3.2×1.3 cm/ 5.04×1.26×0.51 inch

A single module can drive a 8x8 dot matrix common cathode

Operating Voltage: 5V

Fixing screws with 64 holes with a diameter 3mm

Module with input and output interfaces, support for cascading multiple modules

The input port is in the left side of module, and the output port is in the right left of that