Driveway Alarms

It's that plastic wrap they use to protect delicate objects in the mail. It has large bubbles of air.

When you step on them they pop, but it needs a lot of force. A small animal can't do it but a car would.

If it's a long way from the house you'll need a microphone to pick up the noise.

The advantage is there's almost no way to get false alarms from rain, wind, squirrels, lightning, etc.

Good idea. Those always worked.

And nobody today, know what they are .... except for a few of us here!

has large bubbles of air.

can't do it but a car would.

squirrels, lightning, etc.

I have a Dakota Alert DCMA-2500 that works even better than bubble wrap. The sensor is mounted 30" above grade and set on the least sensitivity to avoid detecting squirrels and other small mammals. It's pointed at the gate and alerts immediately if the gate opens or someone sticks in their arm or tosses over a package (FedEx!). The receiver is mounted in the pantry and wired to the doorbell circuit. The transmitter and receiver are 260' apart with several walls, a deck, numerous trees and a 95' elevation change in between. The 9v battery in the sensor lasts for years. It works perfectly with very few - one or two a year - false alarms.