2017 Mar 25, 03:43 AM
The current code works with Ray's board.
The advantage of Ray' s board is that it is all solid state. It is designed to switch 24V AC. The enclosure can be bit of a problem if you need to access alll the ports on the Pi.
Relay boards are are far less expensive but are electro-mechanical. They can switch AC or CD power with a wide voltage range so they can be used to control other things besides sprinkler valves.
Dan
The advantage of Ray' s board is that it is all solid state. It is designed to switch 24V AC. The enclosure can be bit of a problem if you need to access alll the ports on the Pi.
Relay boards are are far less expensive but are electro-mechanical. They can switch AC or CD power with a wide voltage range so they can be used to control other things besides sprinkler valves.
Dan