The goal is to divide all 25 LEDs into a 5X5 matrix. As such, the cathode leg of each 5 LEDs will represent the rows, and the anode leg will represent the columns. Each row is connected to an Arduino ...

On nano avoid A6, A7 as they don't have digital capability. And D13 due to arduino on board led. Other boards pin support may vary. Matrix wiring is intended for momentary switches, you cant use ...

The bare LED matrix has 16 pin outs with 8 common positive and another 8 common negative. For connecting this matrix directly to a UNO, we need to spare 16 pins on the UNO. With the output pins low on ...