I am creating a 16 by 16 LED Matrix using 74hc595 Shift Registers to address the columns and using 4017 Decade Counters to control the row. I am using the 4017's in connection with a transistor to sink the current from the LED's. I understand how to use one 4017 to sink the current but I am trying to cascade another 4017 so I can count until 20 using outputs. I have an arduino providing the clock signal and have tied
ENABLE output to ground, and can control
An explanation of why a supposed solution works would also be great, as I would love to understand how my matrix works from the inside out.