Thank you Omicron for getting this back on track. I do have the 18-20 motion sensor thing, Basically it is an IR sensor you put in your yard on a fence or tree, and when the IR sensor (which looks like much home alarm motion sensors you would have in your hallways) is tripped a Chime much like a doorbell sounds in another unit that I typically keep on my nightstand.

I have one in my back yard since my house is backed up to a geenbelt and it is the only one without a 6 foot wooden fence. Works good, range is nice, but batteries are annoying. Have to constantly check if the batteries are dead.

The mouse trap thing is awesome but there are legal rammifications to setting a booby trap I guess. In SHTF situation anything goes. I will probably look into that. I would prefer the intruder realize instantly that they are where they are not welcome and whatever they tripped to be loud enough to notify me.

I was just thinking that a 12 guage blank going off in my back yard would be enough... but being illegal and in the People's Republic of Aurora, probably not wise.