Because I dive in to check the schematic: if you need to drive DC valves, you should consider getting OpenSprinkler DC, which outputs DC voltage. I know the name sounds confusing, but OpenSprinkler DC just means it’s DC powered, and it can work with both 24V AC valves as well as 12V DC valves. So in a sense it’s more general-purpose.
If you want to just purchase the boards and not the enclosure, we can arrange for that. Just submit a support ticket.