Earlier quoted context omitted.
The best one is the ADS-B Out from airplanes, you can map the planes around you with a $20 widget.
Similarly you can map out lightning strikes with similar tools/methods.
Can you provide some resources about this?
LimeSDR
51–60 of 130 posts
Re: LimeSDR
#52Earlier quoted context omitted.
This doesn't seem right, you might be thinking of a different product. The LimeSDR uses the LMS7002 IC as an all in one dual channel RF to bits chip. The chip specifically is targeting broadband wireless communications applications. Data sheet linked below. https://github.com/myriadrf/LMS7002M-docs
The issue is not with the chip itself, but with with the choices made for the board construction https://wiki.myriadrf.org/LimeSDR_HF_Performance
I was more specifically responding to your comment that it was constructed for "streaming video applications". I don't think the SDR is targeting this application.
Re: LimeSDR
#53still havent used mine. supposedly theres not as much software thats ready for limesdr, that this is a mire rareified pick than many ither options.
Re: LimeSDR
#54I was super into the ham world many many moons ago (DE K2KD), and my curiosity is definitely piqued with the arrival of SDRs. Dumb question(s): Is it possible to do "traditional" HF/VHF ham stuff with these mini SDRs? Is there a good software package that emulates the old-school rigs (but with fancy new features)? Are these radios powerful enough to drive an amp to get to something like 100W (or 1500W) on HF?
As far as transmitting, it's not really practical. Receiving, yes. What I normally do is look for signals using my SDR, and when I want to make a contact, use my FT991A. Even though the 991 has a SDR in it, the dedicated ones have a much wider bandwidth, and the better display and UI of a computer make things a lot easier.
Re: LimeSDR
#55Earlier quoted context omitted.
Similarly you can map out lightning strikes with similar tools/methods.
Can you provide some resources about this?
There is the Blitzortung.org site - https://www.blitzortung.org/en/cover_your_area.php - which has some interesting information.
Re: LimeSDR
#56Earlier quoted context omitted.
The best one is the ADS-B Out from airplanes, you can map the planes around you with a $20 widget.
This sounds really cool. When you say 'around you', what kind of radius are we talking?
You may be able to find out more information, including instructions on assembling your own ground station, at Flightaware - https://flightaware.com/adsb/piaware/build/
Re: LimeSDR
#57No WiFi support?
WiFi is hard to support, it's very complex from a signal processing and timing perspective.
Re: LimeSDR
#58Earlier quoted context omitted.
At 5000 Hz, you could probably just rig up a sound card with a mic input.
I need to output the 5khz, not input it. Would I be able to do that with a sound card in a small form factor? The idea is to have a small box that can convert my heart rate monitor to something that the gym equipment can understand.
I've used a cell phone as an audio signal generator for testing transmitters. There are apps for sending a continuous signal, and I assume it would be easy enough to write one for sending a modulated signal.
BTW, this is one reason why I won't buy a phone without an audio jack.
Re: LimeSDR
#59SDR made me understand how much RF noise my desktop computer emits. Lots of spikes between 400-500mhz. Could be my monitor also, as scrolling text seems to emit the most noise.
interesting... I guess I never scrolled while looking at wideband noise :) I'm going to see if I can determine what is/was displayed on the screen by filtering/machine learning the noise, fingers crossed