Gikfun MAX7219 Dot Matrix Module MCU Control Display Module DIY Kit for Arduino (Pack of 2pcs) EK1921

Hi everybody! Today we will examine the "Dot Matrix LED Module" and test it with the example of "Scrolling Text". This LED Matrix “4-in-1” has four singular displays soldered on one piece of a single printed circuit board. You can easily create a "scrolling text" project by getting this module. We needs only five wires and an Arduino Nano (works also with the other Arduino boards). Connect those wires as shown Now we are ready to load the code, but first we need to install the necessary libraries for the display. Open the Arduino IDE, click on “Sketch“, followed by “Include Library”. Click on “Manage Libraries“, a new window will open, the “Library Manager“. In the search-field enter MAX72xx and chose MD_MAX72xx and install it. So, the libraries are installed. Some types of these modules may require a modification. First test the module with an example sketch. As you can see, the letter