Originally Posted by mytech

Hi everybody, i brought an PIR sensor. Inside it there are 6 terminals.
1.12+ive, 2.12-ive, 3-4.tamper(like open switch symbol), 5-6.Alarm(like open switch symbol).

After giving the power supply the LED is glowing for a period when i cross in front of it.. And i didnt know about remaining 4 pins.. i need get output when i cross.. i checked with multimeter with 4 pins.. i didnt get any volts.. what is tamper?.. how can i get the output from this??..
Thanks..

hi,
Link terminals 3 and 4 together, connect a DMM set for resistance/ohms across terminals 5 and 6.

You dont get a voltge output its just a contact.

The tamper wire is usually a loop of wire around the area you want to cover, if its cut the 5/6 contacts should close.

If you want a voltage on term 5 and 6 use an additional external battery.

Is this clear.?

Originally Posted by mytech

Hi can any one upload some details about PIR..
I mean like data sheet which explains the angles.. directions and some more details(pdf).. I couldnt find easily.
Thanks.

hi,
Most PIR detectors are supplied with a beam pattern and beam angle data.

They vary a lot.
For example,, I Googled pir detector patterns

http://www.espuk.com/pdfs/INF-PIR.pdf

http://www.gx-security.co.uk/images/...541f5411f42f7a