motion detection circuit

billozz said:

i am trying to find out if it would be difficult to build a circuit that would detect persons entering the driveway of my property and sound an alarm to alert me that they are there, if possible i would like to be alerted to people other than those there for legitimate reasons, i have had people damaging my vehicle and would like to catch them in the act. i know nothing about electronics but i am happy to follow any advise
thanks
Bill

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ericgibbs said:

hi,
You can buy a mains PIR detector with or without a light that sounds a 'ding dong' in house when someone enters the PIR area.

The ding dong unit plugs into a regular mains socket, its coded A,B, or C, so that you can have 3 external PIRS, giving an alarm

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QuietMan said:

This might apply for your problem, it doesn't hurt the video is pretty funny.

https://www.youtube.com/watch?v=uIbkLjjlMV8

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billozz said:

could you give me a clue where i could get that please eric

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