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[idbl_fanatic]

My drive way is open, into my yard, what I would like, is something like they have for garage door openers, if someone crosses the light beam it was send a signal to a lamp or something so that I would know someone was coming up my driveway, I know that there is the eagle eye, but I think that would pick up too much "other stuff" birds, cat's in the yard, etc, the driveway is 12 feet wide.

Thanks

[dave w]

X10 really does not have anything other than their motion sensors. I use an Active Eye for our drive and it is aimed high enough to miss dogs, cats, and racoons.

Did you look at "Smarthome.com" ? They carry a vehicle detection system that relies on the vehicle's metal mass for triggering. It is not X10, but if you wanted to tie into X10 system you could use a X10 PowerFlash to detect the units alarm output.

[idbl_fanatic]

Thanks, that's a little out of my price range though.......I may see what I can do with another eagle eye.......

[Knightrider]

I built one of these.

Here's what you need:

http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=LTS1

Hooked to a powerflash.

I had to make some mods, and shielded the receiver end from external light a little bit more, but it works.

I put the powerflash and the power supply in the garage and buried underground telco wire to each unit (don't ask how I got a spool of that stuff).

It's slightly flakey when the fence post gets jingled a bit, and lawnclippings/spiderwebs/dirt have accumulated on the receiver from time to time, but we're happy with it. 

I'll get some pics and more details when I see my son with the camera again.

[Brian H]

Knightrider; That sounds like a neat project.

[jgenter]

I used this:
http://www.asihome.com/ASIshop/product_info.php?products_id=105
It is a self-contained probe type magnetic sensor you bury beside the driveway (covers 12 foot width of driveway).
I used its relay output to trigger a powerflash. It is absolutely reliable and only responds to moving metal objects. Zero false alarms. Mine has been in operation for 10 years.