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PIR based security system

 
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makri



Joined: 01 Jan 2004
Posts: 121
Location: India, Kerala
Post02 Feb 2007 10:17   PIR based security system
hello

anybody can help to find a PIR based security system circuits and pir sensor details

makri
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kender



Joined: 19 Jun 2005
Posts: 978
Helped: 70
Location: Stanford, SF Bay Peninsula, California, Earth, Solar System, Milky Way
Post05 Feb 2007 3:37   PIR based security system
You could start by reading the manual for this PIR sensor http://www.parallax.com/detail.asp?product_id=555-28027
an this page http://www.scary-terry.com/itw/pirsensor/pirsensor.htm
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rogerynt



Joined: 06 Mar 2007
Posts: 109
Helped: 11
Post07 Mar 2007 11:13   Re: PIR based security system
Please make sure to add a schmit trigger and window comparator after amplifiying PIR output signal, otherwise there will be a lot false trigger.

Roger
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