The LEDs are arranged as 8×8 set of rows and columns. Well, the maximum number of LEDs light up at the same time is actually eight. ![]() The question now is how is that possible. The 64 LEDs are driven by 16 output pins of the IC. Actually these pins are all the same except that the DOUT pin of the previous board goes to the DIN pin of the new board. If we want to connect more than one module we just connect the output pins of the previous breakout board to the input pins of the new module. The VCC and GND of the module go to the 5V and GND pins of the Arduino and the three other pins, DIN, CLK, and CS go to any digital pin of the Arduino board. Now let’s take a closer look at the MAX7219 driver. In this tutorial, I will use six MAX7219 LED matrix linked together with a slider potentiometer to control the direction and speed of the scrolling text in real-time.ĬIRCUIT SCHEMATIC arduino 8×8 led matrix scrolling text (CIRCUIT SCHEMATIC) The library in question is the ‘ Parola’ library by MajicDesigns. ![]() So I decided to make this new tutorial but this time using a more flexible library which provides more options. ![]() ![]() It worked, but the library I used at the time was very limited and hard to modify how the text scrolls across multiple matrix modules. Quite a while ago, I did a tutorial on how to create a Scrolling Text using a MAX7219 LED Matrix and an Arduino.
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