I have a number of things that have an output relay and I would like to trigger an event from contact closure/opening on them.
What is the best way to be able to do this? I have seen door/window contact detectors which can be used for this but all I have seen are battery powered and I would prefer to use something that plugs in.
Does anyone know of a good item to use for this?
What is the best way to be able to do this? I have seen door/window contact detectors which can be used for this but all I have seen are battery powered and I would prefer to use something that plugs in.
Does anyone know of a good item to use for this?
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