I'm setting up one of those trap cages in my back yard to catch some of the local neighborhood varmint, and I'd like to set up some kind of detection and alert system that lets me know when something gets in the cage. Searching eBay yields a number of 'remote driveway motion detectors' that send an alert signal to a box inside your house. Here's one...
Driveway Patrol Garage Motion Sensor Alarm Infrared Wireless Alert Secure System | eBay
The trap cage itself is going to be set up inside a large dog house basically so the sensor will have less visual noise to deal with and thus be less likely to give a false positive alarm. Question is...I know this type of sensor is typically used for detecting things a number of feet away, but will it also detect something like a possum say 6 inches in front of it?
Also, if there's a better device I could use that you know of (but still inexpensive) please let me know.
I'm all ears, thanks.