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From: firstname.lastname@example.org (Colubris)
Subject: Re: Proximity Detector
Date: 15 Oct 2002 16:33:28 -0700
NNTP-Posting-Date: 15 Oct 2002 23:33:28 GMT
Many home security and lighting PIR sensors can detect from 70 to 90
feet. Check your local "home-improvement" stores for various
detectors. You'll most likely have to remove all the 120 volt stuff
from the PCBoard - but that's not too hard.
More difficult is the video camera connection. A simple solenoid
probably won't do the job. The camera - to have reasonable battery
life - will have to power down between events. So, when motion is
detected, you'll need to power the camera ON - wait a bit for it to
get ready, then 'press and release' the record start/stop button.
After recording a set amount of time, you need to press the record
start/stop button again to stop recording. The typical video cam will
power down automatically after a time of no activity - so at this
point you can either turn the power off, or just let the camera turn
itself off after you're finished recording.
If the camera has a remote control, it would be very easy to hack with
a few opto-couplers and some timing logic. It's also not too
difficult to open up the case and solder in some wires.
If you've got bushels of money to burn and line power available, you
can buy a time-lapse security recorder - keep the cam on all the time
and just record continuously. If something has been stolen - review
the tape - if not, record over it the next night.
"Robbie Banks" wrote in message news:...
> Can anybody suggest a suitable detector. I've been looking for something
> that covers an area of about 30m with a 60 degree angle spread. All the PIR
> sensors I have found only seem to have a range of about 15m.
> It's to connect to a push solenoid to operate a video camera. The idea being
> to catch the theiving git that's making of with contents from the yard. Any
> suggestions would be appreciated.
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