I was thinking of putting an induction system in the driveway so that a bell would ring when someone pulls in. We have a long drive, partly hidden, and it would be good to know if someone is coming. I'd put it far enough up the drive so that it wouldn't be set off by people who are just turning around from the street.

I like the idea of a hard-wired system so that I don't have to worry about battery replacement. Has anyone had any experience with these? Any recommendations of brands to seek out or avoid?

Paul