Well, I'm trying to learn how to drive a led matrix, and I took a project from the book beginning arduino, but no matter the code i save into the arduino, all of the leds in the matrix are lit up, if someone could help me realizing what's going on, I appreciate, sorry my bad english!

led matrix with max 7219 help

Topic		Replies	Views
arduino led matrix problem Troubleshooting	3	1255	May 6, 2021
Max 7219 Help Needed - Very Simple Matrix Interfacing	10	3131	May 6, 2021
4 column, 5 row LED MATRIX with MAX7219 LEDs and Multiplexing	9	5126	May 6, 2021
Led Matrix with max7219 not working Interfacing	1	1073	May 6, 2021
Arduino connected to LED matrix (MAX 7219) Frequently-Asked Questions	18	9403	May 6, 2021