Once you have installed the library, it is time to connect the LED matrix to the Arduino board. The LED Matrix module has two sets of male header PINs. In this instructable you will only use the input PIN header
The wiring diagram below shows you how to connect the MAX7219 LED dot matrix display to the Arduino.Note that when using the MD_Parola library, you need to orient the display with the DIN connector on the right, otherwise the text will be printed upside down.For more information seethe sect...