71–80 of 124 posts
I personally wouldn't have bothered with Zynq here, so much easier to interface any FPGA with any COTS SBC over Ethernet. Or just use the $160 ZUBoard 1CG, perfect for quick prototyping.
Incredible work. Crazy that this could be done by a single person. Stick it on a rotating pedestal and you've got a planar radar detector. Add some tilt and then it's not much different than aircraft/weather radar I suppose. The cost (in $LOCAL_CURRENCY, or $570 according to another comment) isn't great but I can only imagine how many hours this took. Given a proper budget, the sky is the limit. Anyone know how .mil…
No specific knowledge, of course, but I'd imagine it wouldn't trigger a serious threat warning. Military TWRs are highly tuned systems dedicated to the threat environment they're expected to operate in.
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A similar ITAR restriction on controlled reception pattern antennas means that GPS jamming is still much more of a problem than it needs to be. Three antenna elements are all you get, according to this: https://www.gpsworld.com/toughen-gps-to-resist-jamming-and-s...
Interesting article. I wonder if any progress on the ITAR issue has been made since 2022? If Brad Parkinson can't steer ITAR in the direction of common sense, nobody can. (For those who don't know, he was the principal architect of the original Navstar GPS system.)
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There’s no risk of cancer from heating up tissue.
There is but it's sun burn type risks, not nuclear reactor type. A few unlucky people have been literally cooked to death by military radar. It's as awful as it sounds.
Well to me it sounds like you'd get heat stroke and pass out before anything reaches particularly painful temperatures, because it's heating you pretty evenly and not via contact, but maybe that's not the right way to think about it?
At higher frequencies I would guess it gets closer to normal burning?
This is great. It’s the last piece I needed for my suburban missile guidance system! This will be the last year the Joneses survive the annual block party. Can you do phased array radars next? I need the extra precision. There’s a few neighbors who don’t clean up after their dogs…
"A DIY Cruise Missile: Watch me build one for under $5,000"
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Interesting article. I wonder if any progress on the ITAR issue has been made since 2022? If Brad Parkinson can't steer ITAR in the direction of common sense, nobody can. (For those who don't know, he was the principal architect of the original Navstar GPS system.)
I would prefer we not have homemade cruise missiles all over the place. The people who need them can make them after all.
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Interesting article. I wonder if any progress on the ITAR issue has been made since 2022? If Brad Parkinson can't steer ITAR in the direction of common sense, nobody can. (For those who don't know, he was the principal architect of the original Navstar GPS system.)
I would prefer we not have homemade cruise missiles all over the place. The people who need them can make them after all.
And it's certainly not just a recent Ukraine related thing either: https://www.nzherald.co.nz/nz/boffin-builds-backyard-missile...
Incredible work. Crazy that this could be done by a single person. Stick it on a rotating pedestal and you've got a planar radar detector. Add some tilt and then it's not much different than aircraft/weather radar I suppose. The cost (in $LOCAL_CURRENCY, or $570 according to another comment) isn't great but I can only imagine how many hours this took. Given a proper budget, the sky is the limit. Anyone know how .mil…
> Anyone know how .mil aircraft would interpret being tracked by a 6 GHz radar build by a civilian(yes I am aware that his estimated max distance is 1200m, assume he increased that by a factor of 10 with larger antennas or something)? Regulations for signal strength are ERP, so a more directional antenna could make it no longer legal to use the 6GHz band.
(They're either the kind of idiot who aims laser pointers at police helicopters, or they're doing it with intent to get in much more serious trouble than just ignoring radio regulations...)
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There is but it's sun burn type risks, not nuclear reactor type. A few unlucky people have been literally cooked to death by military radar. It's as awful as it sounds.
> It's as awful as it sounds. Well to me it sounds like you'd get heat stroke and pass out before anything reaches particularly painful temperatures, because it's heating you pretty evenly and not via contact, but maybe that's not the right way to think about it? At higher frequencies I would guess it gets closer to normal burning?
My microwave oven disagrees