Opinion needed on found circuit.

[Jamie]

Please review the link below.
http://www.electronics-lab.com/projects/sensors/030/Everything-that-moves alarm.gif

Is it their intention that Eddy currents traveling along the assumed
electrically conductive object is the bases of this circuit or, do
you think there is more to it than that?
This popped up while looking around for Eddy Current sensing and
this kind of intrigued me..
For ever reason, my older Netscrap browser shows it as an offset to
the left, so I can't read the article. IE only shows this image and
a blank window where the article should be.

 

[Jamie]

That's pretty much it.




The article is at:

http://www.electronics-lab.com/projects/sensors/030/

If you can't read the article, try upgrading to Firefox. ;>)


Mark L. Fergerson

Ok, Well, I still have an issue reading the crap off to the right side
but I got enough of it to see what they're suggesting.

They say "Any thing that moves", after reading, it's suggest that
anything that is near the RX coil. This would assume that the subject
will be standing in the field of the TX coil..

I think the article has some miss leading concepts in the way it's
worded.

Oh well, back to real work.


Thanks.