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Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Joel_Mckay on Saturday November 12, 2022 @12:33PM (#33575178)
Sigh, getting a amateur radio operator license is not difficult, and teaches people such wonderful concepts like avoiding interference with noisy transmitters.

1. If you are using a modulated square-wave without a filter, than the harmonics/overtones will be splattering the local spectrum.

2. Tools like KerberosSDR make triangulating illegal broadcasts rather trivial.

3. Keep in mind, some places have a $5k fine and 1 year in jail... if you are illegally broadcasting.

Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by msla on Saturday November 12, 2022 @01:11PM (#33575481)
> Sigh, getting a amateur radio operator license is not difficult,

It is if you are trying to run from someone who's liable to pluck your address out of a public database (like the one the FCC runs) and come after you, possibly with murderous intent. It is if the government persists in misgendering you because hating you is politically fashionable in some circles. I'm not arguing that it's conceptually difficult, but "That Hobby Where The Government Publishes Your Home Address" might be unpopular for reasons beyond the difficulty of understanding the hobby's conceptual level.

Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by 13of40 on Saturday November 12, 2022 @01:57PM (#33575898)
On a related note, I see a lot of amateur radio enthusiasts who use their call sign as a vanity license plate. If you do that you should be extra polite in traffic because if someone types that into Google they get your full name and address.
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Joel_Mckay on Saturday November 12, 2022 @02:22PM (#33576152)
Sounds like you should move someplace nicer, as many zones use a checkbox on the application to prevent publishing such details. ;)

Read about halfway through this book so far, and It argues a fairly good case that Mr. Burns was based on a real person: https://www.amazon.ca/When-McKinsey-Comes-Town-Consulting/dp...

Have a wonderful day, and have faith most are lazier than they are evil =)

Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by BenjiWiebe on Saturday November 12, 2022 @03:20PM (#33576638)
I haven't done it but I've heard you can use a PO box for your license.
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by wrycoder on Saturday November 12, 2022 @04:05PM (#33577073)
You can in the USA. Mine does.
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Spivak on Saturday November 12, 2022 @02:20PM (#33576117)
That’s cool and all, but getting an amateur radio license would not have allowed me to do what I want legally anyway which is run a low power music FM station broadcasting to common radios in my own apartment. I do use a filter but it wouldn’t matter if I didn’t, I don’t really care that I’m splattering the spectrum when the broadcast doesn’t even make it through my walls.
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Joel_Mckay on Saturday November 12, 2022 @02:29PM (#33576214)
If I recall, license free 88.7MHz under 15mW transmitters for FM audio were very common in some zones.
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by fest on Saturday November 12, 2022 @04:03PM (#33577049)
I believe the EU limit is 50nW (at least it is in the EU country I live).
Re:Turn Raspberry Pi’s GPIO into an FM Transmitter by Johnythree on Saturday November 12, 2022 @04:19PM (#33577203)
> when the broadcast doesn’t even make it through my walls.

But you don't know. If it's radiating a few milliwatts (or even microwatts), that's sufficient signal to be hear across town in a sensitive receiver.

The really sad thing is that the unwanted signals could well be stronger than the unwanted one due to unwanted resonances in the antenna wire, etc.