![]() ![]() If you are not familiar with this interface, let me explain it. The labels on the left side (1,2,3,4,5) represent the supply (VCC which is normally 5V and GND) and also the interface of the IC which it uses to communicate with a microcontroller, in order to get the text that will be displayed and to set the working parameters. Now it may look a bit confusing but let me explain the functioning principle. So, I ordered the IC’s to control them, and came up with this schematic: I had some of those 8×8 Matrixes laying around and I could not find a use for them. If you are an electronics beginner, who already grasped the basics of Arduino and electronics, and want to tinker more around such circuits, here is your perfect place to start off.īefore getting further into the project, I want to present my idea and explain to you why I even made this tutorial. The IC I will use for this project is called MAX7219. ![]() To make our lives easier, we can use an IC which is design to do the chore of sending the corresponding signals for the LED’s. Controlling the LED Matrixes with an Integrated Circuit(IC): MAX7219 To do this by hand would be quite a chore because the goal of this project is to show some scrolling text on the Matrix. By sending a signal to a row and column we can light up an LED in the Matrix. To have a better understanding of how such LED Matrix works, here is its’ inner circuit:Īs you can see, the anodes of the LED’s form the rows, while the cathodes form the columns. They manufactured the PCB’s I am going to use for this project, but more details about that later. ![]() I want to thank PCBGOGO for making this tutorial possible. For example, the Matrix I am going to use in this project is an 8×8 Matrix, which means it has 8 columns and 8 rows of LED’s, and it looks like this: They consist of, as the name implies, LED’s. 3 Controlling the LED Matrixes with an Integrated Circuit(IC): MAX7219Įverybody is familiar with LED Matrixes. ![]()
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December 2022
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