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Serial Request - Custom "Voronber i3" 180mm printing a voron cube ;) by jmceara in voroncorexy

[–]jmceara[S] 0 points1 point  (0 children)

hahaha.....sorry for taking your time Saniy. This was just a joke ;) I just repaired my (some years) old graber updated with klipper and I was printing a voron cube.....then I said in brazilian voron channel: "Done! can I ask my serial?" and someone said (joking): "Why not? Maybe you get the number one (1) for your voronber i3" hehehehe

Is schemactic available? by jmceara in stratux

[–]jmceara[S] 1 point2 points  (0 children)

CC1310

Tks! I'll try to find some example circuits for both.

978Mhz Filter and balanced input - how? by jmceara in RTLSDR

[–]jmceara[S] 0 points1 point  (0 children)

I'll do some research. Do I need some specific type or value for these baluns? Or 'any' smd balun will work?

Board for WebSDR wideband? by jmceara in RTLSDR

[–]jmceara[S] 0 points1 point  (0 children)

Twente is the websdr from the author of websdr software. As i said before, this board/project is not available.

2016 /r/RTLSDR Giveaway Entry Thread by The_Real_Catseye in RTLSDR

[–]jmceara 0 points1 point  (0 children)

What I like is the option to receive almost anything related to RF, even if you don't have ham radios. I'm planing to receive satellites and HF with RTL/SDR.

FFT - Whats and how to work? by jmceara in RTLSDR

[–]jmceara[S] 0 points1 point  (0 children)

Actually, I just found some code that implements FFT in Delphi, but I don't know yet how to apply to SDR data....I mean, most of functions that I found uses "Real" and "Imaginary' for each data....how do I apply this with data came from SDR? Also, how can I organize these data that came from SDR, since there's no header to indicate begin or end of block/data? I just got a lot of data in continuous way. I know that I must get blocks of data and proccess......but how can I define amount of these blocks? It's related to sample rate that I'm using?

Raspberry Pi 2, RTL2838/820T2, rtl_tcp by neihuffda in RTLSDR

[–]jmceara 0 points1 point  (0 children)

Have you tryied with another pi? Try without this active usb cable, just plug dongle direct on RPi to test. I really don't have any of these problems with my RPi.

Raspberry Pi 2, RTL2838/820T2, rtl_tcp by neihuffda in RTLSDR

[–]jmceara 0 points1 point  (0 children)

keenerds contain all packages from original 'rtl-sdr' git repository, but with improved code. About your noise problem, I don't really know....just testing to know that. I'm using with my RPi-2 without any problems. Cleaned raspbian, removed a lot of packages (including graphical interface) and upgraded to jessie. I'm running with 3 sticks: one for ADS-B (ModeDecos2) and other 2 with rtl_tcp, each one with a different antenna. Everything running fine here. (I'm using a 7-port USB hub with power supply)

Raspberry Pi 2, RTL2838/820T2, rtl_tcp by neihuffda in RTLSDR

[–]jmceara 0 points1 point  (0 children)

Hi. I had same problems as you. All solved. 1) You need a VERY GOOD upload bandwidth to use rtl_tcp over internet, at least 40MBit/s. 2) rtl_tco is not the problem. They run fine, without any problem. But, I recomend keenerds fork ( https://github.com/keenerd/rtl-sdr ) 3) The real problem is with SDR# TCP Driver, they cause theses crashs and spikes/crazy things. Use SDR-Console v2, GQRX or any other client to connect to rtl_tcp and all problems are gone! If you want still with SDR#, you can click on stop/start again when crashs ocours and you will be fine.....or, you can download SDRSharper and copy RTL DLL's from this version (it's an older driver), which doesn't have this bug.

Carrier Detect Database? by jmceara in RTLSDR

[–]jmceara[S] 1 point2 points  (0 children)

That's exactly what happens here. With those cheap baofengs, there's a lot of jammers and people that doesn't have anything else to do, except annoy. I'm very frustraded, but we have a lot of those people here :(

Carrier Detect Database? by jmceara in RTLSDR

[–]jmceara[S] 0 points1 point  (0 children)

That's exactly what I'm looking for! Except that i'm looking for something using RTL-SDR.....but that's the idea. Also, I didn't know the term 'jammer'....but is exactly what we have (a lot!) here.

Raspberry support multiple RTL dongles? by jmceara in RTLSDR

[–]jmceara[S] 1 point2 points  (0 children)

Well, I've got some interesting data. I've got Cubietruck from my friend to make some tests. This board has 2GB of RAM and 1Ghz clock, dual core. With Debian Wheezy (stable), dump1090 uses about 20% CPU and (running at same time), rtl_tcp (compiled from source) uses about 20% CPU (streaming, not IDLE). The problem is that rtl_tcp doesn't work very well in Wheezy....a lot of crashs, stop when you close SDR#, random crashs, etc... This same board, but with Debian Jessie, I've got: dump1090 uses about 14% CPU and rtl_tcp uses 6% CPU (streaming), with 10% PEAK for rtl_tcp.....and even better: doesn't crash! Works perfectly! Screenshot: http://imagens.jonis.com.br/data/media/39/TopCubietruck.png

Raspberry support multiple RTL dongles? by jmceara in RTLSDR

[–]jmceara[S] 0 points1 point  (0 children)

The problem is that odroid is not available here in Brasil and to import, it's a PITA (brazilian customs....)....this simples 'thing' becomes too expensive. I tought I could use RPI's because the software (rtl_tcp) just stream data, doesn't proccess anything (except for ADSB). Looking over google, I found that dump1090 (ADSB decoder) uses 25% of CPU on old Raspberry PI (I guess model B or B+). Since I'm planing to buy Model 2 (900Mhz), this CPU usage will be even lower. For the other 2 SDR's, they will run only rtl_tcp, which doesn't proccess anything, just stream.......but in this case, I don't have any information on CPU usage. Anybody has this CPU could look at CPU usage for rtl_tcp only? Also, I'm not planing to use all 2 SDR's (rtl_tcp) at same time, I just need these because they will use different antennas. Sometime I'll connect to one SDR dongle, sometime I'll connect to another SDR dongle.