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Re: Driveway alarm Posted by don_young [Email] (#815) [Profile/Gallery] (more from don_young) on Wed, 12 Feb 2014 01:28:18 In Reply to: Driveway alarm, BobS, Thu, 6 Feb 2014 19:57:23 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I elected to go with product in the link below. Came with a battery powered sensor and I bought an additional solar powered sensor/transmitter. Both operate by detecting changes in magnetic flux. I have placed one about 20 feet from the street (so passing trucks don't trigger it) and the other about 50 ft further up the driveway. The receiver tones generated by the two sensors are different so directionality can be deduced. Because this does not involve a passive infrared detector, warm-blooded animals won't trigger the sensors, but by the same token the UPS guy/gal won't be detected if they walk the package to your door, unless, of course, a hand-truck is used.
_______________________________________ ================================ Current stable: 1967 96 V-4 Monte Carlo 1968 Sonett II V-4 1988 900T convertible 2006 9-3 2.0T sport-combi -- stage 1 BSR 2011 9-3X -- Stage 1 BSR ================================
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