I want to build a custom irrigation control system using the Raspberry PI. The main obstacle I have to getting started is knowing how I can use the Raspberry PI to send power to the valves to open and close them.
I currently have an existing irrigation system and control system, so everything is already wired, setup, and working.
I essentially want to write some software for the PI, remove the existing irrigation controller and replace it with the PI and drive the irrigation using the custom software.
From what I have read, I'll need an add-on board to be able to drive the valves...that's where I need the help. I'm looking for some direction on where to look next.
Thanks for the help!