PIR based security system

[makri]

hello

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

makri

 

[kender]

You could start by reading the manual for this PIR sensor https://www.parallax.com/detail.asp?product_id=555-28027
an this page **broken link removed**

 

[rogerynt]

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