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Subject: Re: Electronic Parking Spot Finder
Date: Fri, 20 Dec 2002 02:00:15 GMT
NNTP-Posting-Date: Fri, 20 Dec 2002 13:00:15 EST
Organization: BigPond Internet Services (http://www.bigpond.net.au)
You would probably find this MUCH easier with a Flux Gate Magnetometer
or other magnetic field sensor. Philips and Honeywell SSEC have a good
> I live in urban Boston and parking is notoriously bad around here.
> I'm considering building an electonic project to help with this and
> would love any feedback. My idea is that around here street spaces
> are the best thing to have because you are not blocked in as you are
> if you park in the single lane driveway that comes with my house. I
> want to build a detector that I can turn on when I park in the
> driveway and it will "watch" the street to see if any spaces open up
> and then let me know with some alarm or flashing light or whatever.
> My idea for the electronics is this:
> If I had an array of 6-12" long .5" diameter black plastic tubes that
> contained a photodiode. I would use the tubes to "aim" the sensors at
> each parking space I want to monitor. I would have one tube acting as
> a base level control to account for changes in ambient light. I would
> compare the signal from each sensor with the baseline and tune it to
> react so that the reflected wavelength off the cars would trip the
> alert when a car left a monitored spot. What do you guys think?
> Thanks for any input
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