I have some LED matrixes and few ma7219. So just to try it I hooked a matrix with a 7219 chip according to below tutorial.
Everything went fine, and I checked the wiring more than twice and it is fine to my knowlegde. But when I plug in the arduino into computer the matrix displays the first letter of the sentence and then the text vanishes (turns off). And I can gain get the letter by pressing reset on arduino. Even after that it vanishes after displaying the first letter "N".
Can someone help me with this ?
Thank you