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 Passive Proximity Sensor		  New Topic  Reply to Topic
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bill
Apprentece

USA
11 Posts
Posted - Sep 21 2008 :  08:15:56 AM  Show Profile  Reply with Quote
What is it and what is it used for???

pebe
Nobel Prize Winner

United Kingdom
1078 Posts
Posted - Sep 21 2008 :  09:08:45 AM  Show Profile  Reply with Quote
Which one?
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bill
Apprentece

USA
11 Posts
Posted - Sep 21 2008 :  9:18:53 PM  Show Profile  Reply with Quote
Are there more then one?
I was asked if I had ever used one. I just looked dumb and said no.
But the more I thought about it I would like to know something about it.
Edited by - bill on Sep 21 2008 9:20:55 PM
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audioguru
Nobel Prize Winner

Canada
4218 Posts
Posted - Sep 22 2008 :  12:08:16 AM  Show Profile  Reply with Quote
A PIR is a passive motion detector sensor.
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Aaron Cake
Administrator

Canada
6718 Posts
Posted - Sep 22 2008 :  7:02:24 PM  Show Profile  Visit Aaron Cake's Homepage  Send Aaron Cake an ICQ Message  Send Aaron Cake a Yahoo! Message  Reply with Quote
I've also seen passive motion sensors that use ambient light levels. They detect subtle changes in ambient light reflected into a sensor. PIR sensors are much better though.
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bill
Apprentece

USA
11 Posts
Posted - Sep 23 2008 :  09:13:31 AM  Show Profile  Reply with Quote
Thanks audioguru and Aaron Cake!!
That's what I like about this website. You are a big help!!!!
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