Put that delay(1000) back into updateShiftRegister(). Check that each column lights in turn, on all 3 rows. Then reduce to delay(500), then delay(250), delay(125), delay(63) and so on. At what point does the display to crazy like in your last video?
Put that delay(1000) back into updateShiftRegister(). Check that each column lights in turn, on all 3 rows. Then reduce to delay(500), then delay(250), delay(125), delay(63) and so on. At what point does the display to crazy like in your last video?