> This does nothing to make your projects legal. "Open" spectrum like this only allows you to operate certified devices where the vendor
Yes, most radio transmitters are certificated (including Part 15 transmitters like Wi-Fi routers), but homebrew devices should still be possible under Part 15 without certification. Part 15 allows the use of unlicensed radio transmitters built for personal use, not marketed, not constructed from a kit, and built in quantities of five or less, without going through the process of certification by regulators. See [0].
However, whether it can be implemented within the technical requirement and limitation of Part 15 is another question. Usually, Part 15 is very limited, it may or may not be usable for your project, unlike the amateur radio service (Part 97), which is a more powerful service.
> actually stick to their band and power limit, and don't interfere on some random harmonic. To build your projects you need a ham license.
Same for ham. The only difference is that certification by a regulator is not needed, and the technical standards that need to be satisfied is different, but regardless of what service you operate in, you must test your equipment by yourself to ensure the technical requirements are not violated.
Admittedly I'm hazy on the details, I just stowed away the bottom line ;).
AFAIR what it boils down to is that if you have a ham license, there is a presumption that you know to some extent what you're doing (15.15.a?); so if you do break something it probably makes the distinction between "reckless" and "accidental".
Honestly if you do it well the question won't come up. So either you learn your shit well enough for it to not matter, or you get the ham license for insurance at the cost of at least proving you got the gist down. shrug :)
Yes, most radio transmitters are certificated (including Part 15 transmitters like Wi-Fi routers), but homebrew devices should still be possible under Part 15 without certification. Part 15 allows the use of unlicensed radio transmitters built for personal use, not marketed, not constructed from a kit, and built in quantities of five or less, without going through the process of certification by regulators. See [0].
However, whether it can be implemented within the technical requirement and limitation of Part 15 is another question. Usually, Part 15 is very limited, it may or may not be usable for your project, unlike the amateur radio service (Part 97), which is a more powerful service.
> actually stick to their band and power limit, and don't interfere on some random harmonic. To build your projects you need a ham license.
Same for ham. The only difference is that certification by a regulator is not needed, and the technical standards that need to be satisfied is different, but regardless of what service you operate in, you must test your equipment by yourself to ensure the technical requirements are not violated.
[0] https://ham.stackexchange.com/questions/1016/what-are-the-us...