Where I live, car theft is rampant. Brand new Mercs, Audis, BMWs and more being stolen from people's driveways. The methodology employed is a relay attack where a high gain amplifier of some sort is used to probe for /communicate with the remote fob. More detail below.
I wish to create a small device which buzzes when communication over the frequencies 433.92MHz (in Europe) or 315MHz (US) is detected. Let's say within a range of 2-3m (we don't want it detecting a signal 100m away!). Ideally a little bit more of the spectrum either side of the above frequencies should be detectable too. The idea would be to place the box somewhere near where the keyfob is stored. If during the night a thief attempts to detect the remote fob, a buzzer should go off and give the owner a chance to disrupt the attempted theft.
I have an emerging amateur interest in electronics and understand basic electrical concepts. I have played around with pots, digital/analog I/O boards, Arduino (have good coding skills in general). It's a start right?
I'm tying to understand some of the components required to make my idea happen and perhaps some suggestions on how to make it more reliable/fool proof. If anyone wants to shoot the idea down, please do so with a little explanation as to why it wouldn't work.
Many thanks
I wish to create a small device which buzzes when communication over the frequencies 433.92MHz (in Europe) or 315MHz (US) is detected. Let's say within a range of 2-3m (we don't want it detecting a signal 100m away!). Ideally a little bit more of the spectrum either side of the above frequencies should be detectable too. The idea would be to place the box somewhere near where the keyfob is stored. If during the night a thief attempts to detect the remote fob, a buzzer should go off and give the owner a chance to disrupt the attempted theft.
I have an emerging amateur interest in electronics and understand basic electrical concepts. I have played around with pots, digital/analog I/O boards, Arduino (have good coding skills in general). It's a start right?
I'm tying to understand some of the components required to make my idea happen and perhaps some suggestions on how to make it more reliable/fool proof. If anyone wants to shoot the idea down, please do so with a little explanation as to why it wouldn't work.
Many thanks