131–140 of 249 posts
Earlier quoted context omitted.
But the jammer can be plugged in to the grid or a diesel generator. Being on the ground without flight requirements grants access to such resources.
Yes. That makes it fat, expensive and vulnerable target. There are videos of them being blown up regularly.
Earlier quoted context omitted.
But the jammer can be plugged in to the grid or a diesel generator. Being on the ground without flight requirements grants access to such resources.
But such a jammer is expensive and a magnet for HARMs that only need that RF signature as guidance.
Earlier quoted context omitted.
Yes. That makes it fat, expensive and vulnerable target. There are videos of them being blown up regularly.
Which is a completely unrelated to what we were talking about.
QuadRF creator here. Happy to answer questions! We have a quick demo video as well: https://m.youtube.com/watch?v=QvniJk3uNyA Along with a deeper dive video: https://m.youtube.com/watch?v=zdJ9Tbm8ALg We didn't give Jeff great direction on camera alignment calibration or setting the radio gain but he seemed to mostly figure it out. We're improving the UI based on his suggestions (it's open source so you can customize…
The original quote for a single tile was $50-$100 They came out at $500 Being off by a bit is fine. Being off by 5x to 10x is.. Yikes.
QuadRF creator here. Happy to answer questions! We have a quick demo video as well: https://m.youtube.com/watch?v=QvniJk3uNyA Along with a deeper dive video: https://m.youtube.com/watch?v=zdJ9Tbm8ALg We didn't give Jeff great direction on camera alignment calibration or setting the radio gain but he seemed to mostly figure it out. We're improving the UI based on his suggestions (it's open source so you can customize…
The really intriguing part is the "Custom ADC" here, seems like some kind of 1-bit ΣΔ oversampling ADC (704 MSPS?). Single differential transistor, and captured by FPGAs LVDS RX. Neat way to reduce cost and pin-count? But I think the typical FPGA clock tree has poor jitter performance. Not using the internal PLL(s) might help with spurs but the clock buffers are unavoidable. The documentation mentions it's likely fur…
[0] https://www.prnewswire.com/news-releases/the-future-takes-fl...
It's a really neat device, but people should realize that it has a very narrow visibility.
Earlier quoted context omitted.
I mean, drones trailing fiber optic cables are widely documented https://en.wikipedia.org/wiki/Fiber_optic_drone So I’m pretty sure avoiding jamming by a military adversary is not trivial, even with frequency hopping and suchlike.
FPV drones in the Russian war are generally pretty dumb devices, there's usually no frequency hopping involved to begin with. They have a lot more in common with baby monitors than with modern military comms.
One day I want to build something like this, except for sound. It would be great to get a heading and distance for where a sound is coming from. This could be both for small scale things (e.g. which part of this is squeaking?) or large scale (e.g. is that booming noise coming from the construction a few blocks away?)