I remember reading a story about a guy who went to prison for running a cell phone jammer on the interstate to keep people from using their phones while driving, so keep that in mind if you decide to try jamming radio signals in an area. Hypothetically.
this post was submitted on 31 Jan 2024
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Flipper Zero is a portable multi-tool for pentesters and geeks in a toy-like body. It loves to hack digital stuff around such as radio protocols, access control systems, hardware and more. It's fully opensource and customizable so you can extend it in whatever way you like.
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You are correct. It is against the law because it prohibits emergency services.
Then there was that old fart who did it on a train quiet compartment https://www.cnet.com/culture/man-arrested-for-allegedly-using-cell-phone-jammer-on-train/
Have you considered just tossing a rock through his windshield instead?
hypothetically of course
Hypothetically no. You'd have a better chance with one of two ways. 1. If the radio receives RF signals someone might be able to find the correct RF signal that would allow them to change the station on a radio or turn it off and on to the point of frustration. Again this is only if it has the ability to receive rf signals and the the send/receive is in range 2. An FM transmitter with the same radio frequency that would over power the radio signal in the local area. If you have ever heard two radio signals at the same time it is because they are competing on the same band. If there was a strong enough signal close enough whatever was playing on the more powerful signal would be heard. Unfortunatly if the hypothetical person just decided to play a CD this would not help in any way. Blocking FM transmissions could be prohibited in areas based on the fact that emergency services might use them. Pressing a panic button on a car alarm is not against the law but it is very annoying to anyone around.
What's the radio station frequency? I wonder if you'd be able to do it with one of those car fm transmitters. They're typically limited to between 87.9 and 107.9, but they're also limited in power to around 200 feet of range - and within those constraints it's fully legal in the US. But sticking to the legal transmit power limit would make me feel a lot safer about not getting in trouble because if you have to transmit out of the legal frequency range, it'll make it much much less likely someone will notice.
Flipper zero out of the box does not cover frequencies between 88 MHz and 108 MHz. Maybe a GPIO attachment and custom software like extreme. But I’m still not sure it will cover the FM band.
I wonder if we can build an FM jammer for this hypothetical situation. You know, just to see if it works.
I would be happy to contribute some money to this hypothetical effort. I wish I had skills or knowledge to contribute as well, but I'm afraid those are in even shorter supply
Maybe we can start with one of those wireless FM transceivers that allow you to connect your phone to an available radio station. Most of the time those are frequency agile. Meaning you can change the frequency to whatever you want. Now we need an amplifier to amplify the output side of the transceiver and voila, we’ve created an FM band frequency agile jammer. Hypothetically of course.