Search for: Log In Register OpenSprinkler › Forums › Comments, Suggestions, Requests › 24 VAC Relays This topic has 1 reply, 2 voices, and was last updated 9 years, 10 months ago by Ray. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts March 6, 2015 at 5:14 pm #35853 AnonymousInactive You can also go to your local central vacuum store and ask for the power supply and relay out of their discarded central vacuums. These are all run on 24 VAC, there is a relay and transformer on all of these units. March 6, 2015 at 10:52 pm #35857 RayKeymaster Thanks. Just as a reference link, we wrote a blog post about 24VAC relays that we’ve tested internally: https://opensprinkler.com/using-24v-ac-relays-with-opensprinkler/ Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In OpenSprinkler › Forums › Comments, Suggestions, Requests › 24 VAC Relays