Arduino led matrix max721911/21/2023 The wiring diagram below shows you how to connect the MAX7219 LED dot matrix display to the Arduino. Note that for this tutorial I used pin 3 (see table below). You can select any of the digital pins of the Arduino for the SS/CS pin. VCC, GND, CLK, and CS are shared between all of the displays. You can daisy chain multiple displays to create one large display by connecting DOUT of the first display to DIN of the next display.
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