this post was submitted on 31 Jan 2024
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Flipper Zero

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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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FM Radio jamming? (self.flipperzero)
submitted 10 months ago* (last edited 10 months ago) by mulcahey to c/flipperzero
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Can you jam an FM radio signal with a FZ?

Let's say, hypothetically, there's a guy who parks on your street once a week and -- for some reason that no one understands and he refuses to explain -- he absolutely BLASTS a butt rock radio station from his car speakers for 20 minutes at a time, so loud that it bounces off all the buildings on your narrow street and it sounds like it's coming from every single window. And when you go out and say, "Hey dude, I'm taking a call for work, could you not do that here? Or anywhere, really?" he smirks and looks at you like you're the one acting crazy.

Again, this is a hypothetical.

But in this hypothetical situation, could you use a FZ to jam his car radio? How? (I know that many people might call the police/311 and ask them to do something about this. That is not how I want to do this.)

Thank you for indulging this completely made up scenario.

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[–] Fapper_McFapper 2 points 10 months ago (1 children)

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.

[–] mulcahey 2 points 10 months ago (1 children)

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

[–] Fapper_McFapper 3 points 10 months ago

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.