Intruder/burglar Alarms

J

John Murdock

Member

• Apr 6, 2016

• #1

Has anyone come across or know of any intruder alarms based on some sort of motion sensing that triggers sound/light alarm which could work in practice?

 

Last edited: Apr 6, 2016

ericgibbs

Well-Known Member

Most Helpful Member

• Apr 6, 2016

• #2

him
I use these PIR's from Amazon.
They have a 3V output when a PIR object is detected, adjustable sensitivity and On period.

The PIR output can drive a transistor/relay combination

E

 

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Dr_Doggy

Well-Known Member

• Apr 6, 2016

• #3

this is motion sensor light:
**broken link removed**

you could put one of these on it:
http://ecx.images-amazon.com/images/I/616sfQwB+LL._SL1102_.jpg

then you could attach a ac120v-12v power adapter to power a common 12v alarm
http://site.ambery.com/webgraph/ACDC12V1A-Product.gif