03-17-2022, 05:38 PM
The DB9's don't have any signals from pca9685, these are all GPIO's from Pi. You can split them up, simply run 4 wires to one relay board and 4 wires to another. Then the same with Ground. Here's a link showing which pins are what on the DB9's.
https://docs.google.com/document/d/1FtkR...=h.44sinio
https://docs.google.com/document/d/1FtkR...=h.44sinio