Ray I am looking at the possibilities of using an OpenSprinkler unit to turn on and off lighting as discussed in this thread. We have a yard that tends to get a few parties and has multiple Malibu type lighting systems. I would like to bypass the built in clock turn the manual switch on and turn on and off the AC power to the unit via the relays discussed above. I plan to switch the option in the Opensprinkler to Concurrent as opposed to Sequential. there for I can have all the lights be on at the same time if wanted.
My question is how many relays do you think the opensprinkler board could drive at the same time?