Here is how I am hooking up three 16 relay boards to my mega. Now just working on how to hook them up in series to talk to Vixen so only the relay comes on that I want and not the same relay on all three MEGAs.
I don't know if this will help you, but I am running my light show with an Arduino Mega and banks of relays each ran by an a Mega controlling 48 relays in this case I am using mechanical relays its what I had. They are programed to work with the vixen software daisy chained together. some...
one box will control my singing light bulbs, the rest will be switch both AC and DC elements throughout the yard. Was having trouble getting my renzilla up and running.
First year trying this kind of setup, but I am quite handy with electronics. Looked into this and decided to use Arduino mega 2560's daisy chained to control all of my lighting. Almost finished my first control box. I am adding singing light bulbs to my display, one control box set aside just...