dionysusjg
New Member
Hey all. I'm working on a project, and I would like to add a proximity alarm feature, ie, there are two halves to the device. If the halves move further than a set distance from each other (say, 5 meters) then an alarm in one or both is triggered (ie the devices need to be kept close to each other)?
Can anyone point me to an existing device or schematic for such a circuit?
Can anyone point me to an existing device or schematic for such a circuit?