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FPV Experimenter
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Everything posted by Devonian

  1. Darn, wish I hadn't dropped by - this is a real interesting project and I love the little Pi's (3 running at my place so far), but I just don't have any spare time at the moment ! Watching with interest.... Nigel.
  2. Hi Thomas, Great project. Similar here - with a firmware for no bluescreen (on first post). No idea if it works? http://www.rcgroups.com/forums/showthread.php?t=2366714 Nigel. edit pdf attached, might prove useful? Darn - Link instead as file is bigger than 250Kb upload limit http://www.fangzhou8.com/Upload/DownFiles/20121022151656859.pdf
  3. Somebody mention me? I've been absent too, I moved home, downsized and totally modified the new place to our liking - took nearly 2 years, but it's about there now. I got a decent man-cave out of it and it's nearly finished so I can get back into things again and blow the dust off some of my models and equipment that have been mothballed. Even in 2 years things have changed so much and as Terry mentioned, my brother is now interested in FPV having purchased a Phantom and I'm helping kit it out for FPV (complete with gimbal)! He is not overly interested in all the technicalities and I'm kind of the opposite. Neither of us criticise one another for our different approach to the hobby. I've just built a little 250 quad for bashing about with, but my spare time is still a bit thin and the UK weather is rubbish at the moment but it seems quite addictive. Really interested in all the comments about the DIY side of things and it's difficult to be truly inventors these days & probably we are more innovators? Nigel.
  4. Seems others are making it commercially viable... http://www.napolskimniebie.pl/ also available here http://www.quadframe.us/products/fpv-video-googles If only a decent grade LCD screen were available! Recently posted in this thread in the UK I'm watching http://www.fpvhub.com/index.php?topic=12833.0 Nigel.
  5. I agree that the increased vRx sensitivity combined with CP antennas has made 5.8GHz viable. The current CP antenna development was first kicked off worldwide on this very forum http://www.rc-cam.com/forum/index.php?/topic/3610-antenna-projects/page-2 (second post down - #22 ) Seems like an age ago ! Nigel.
  6. I have the G12 as a 'point n shoot' and love it - even the wife can take decent photo's with it. I recently gave my G5 to my youngest. I used to have a G7 as well. Have you tried the G15 Terry? http://www.dpreview.com/reviews/canon-powershot-g15/3 I was tempted as it's smaller than my G12, but Canon fixed the LCD panel as per the G7/G9 and I like the flip out panel for those obscure shots. I guess it very much depends on your requirements and budget. There are better cameras, but I like Canon! Nigel.
  7. OK, tested both and although not very scientific, so far I prefer the E400 based one over the 820T one, but both will have their uses I suspect. I set both up using the supplied antenna, gain set to zero and tuned to a broadcast FM radio station around 89MHz. The E400 was fully quieting on a weakish signal (no background 'hiss'). Changed to the 820T one and it was not fully quieting with some detectable background hiss. Changed to 434MHz and listened for my wireless weather staion transmissions. Again, the E400 appeared better with what 'sounded' like a better signal. Set my R/C Tx on 35MHz and the E400 could not detect the signal, but the 820T did see the signal, no problem. I have no means to test any signals higher than 434MHz at the moment. The 820T one has an MCX connector with adapter cables for Belling Lee and SMA. The Belling Lee adapter cable may be an issue because I can get rid of some spikes on the Spectral display by wrapping my hand around the antenna to adapter cable joiner. I may mod my E400 one to get rid of the Belling Lee connector on the PCB. I think an SMA chassis socket may fit in there quite nicely? - that is, when I can find my stock in cold store somewhere. Nigel.
  8. I ordered 2 sticks from the cozycave site and got them next day! I ordered an E400 tuner and a 820T tuner to observe the differences. Will try to get some time to check them out properly, but they both work fine. My ebay one turned up as well and it's useless for SDR as it has the IT9135FN chipset. Here is another interesting lower frequency add-on/upconverter http://www.nooelec.com/store/ham-it-up-v1-0-rf-upconverter-for-software-defined-radio.html I've ordered one as I sold all my radio gear when I moved house and this will be an interesting side project. Haven't seen any kind of GHz converter, but I guess it will only be a matter of time. Nigel.
  9. I've used this free software for 2.4GHz wifi - it also does 5.8Ghz but I've never tried 5.8GHz. Can you get 5.8GHz wifi 'dongles' ? http://www.metageek.net/products/inssider/ Never thought to try it on my 2.4GHz FPV VTx. No chance at present either as all my gear is in cold storage after a recent house move and the new 'man-cave' is being built (during the wettest period since records began). Can any SDR software use these wifi dongles and will it 'tune' to 5.8GHz? Nigel.
  10. Mine is on it's way through eBay, but although it says it's located in the UK, that may not be true as I've had similar and it's come from Hong Kong! For anyone in the UK or Europe, I found a site that seems to sell a variety of these USB sticks - wish I'd found it earlier. https://www.cosycave.co.uk/category.php?id_category=56 If you look through the different types, they also sell adapter cables or a stick with vaious connectors. I'll see what mine is and then maybe order one of the other types for testing. Nigel.
  11. Well, you got my interest! I found what I believe to be a suitable USB stick on eBay UK and ordered it earlier today. Googlin' around, I found that the RTL2832u & E4000 tuner stick is now an 'old' product, superceded by a RTL2832u & R820T tuner. Youtube has several examples of the difference, mostly in favour of the R820T tuner. We'll see what turns up at my doorstep. I have an immediate use for it as a Spec-An for testing OpenLRS/HK OrangeLRS tweaked for 459MHz. Failing that, it might be useful as a scanning tool at our clubs next 50MHz contest with a pair of 9 ele Yagis strapped to it?! Nigel
  12. Hi Terry, No, I don't use it. I found the patch antennas to be not very good and as I now have an MFD tracker, it's redundant (but still complete). I have 2.4GHz video on one model and everything else is now Sky-RF based 5.8Ghz. Only been out twice this year, but moved house and the new 'man-cave' build is well under way. Should get a roof on it over the holiday period... Then it will need some time to dry out so I can fit it out, maybe, just maybe, in a few weeks it might just be useable? Trouble is, I need it as a temporary dry store whilst I decorate a couple of rooms. Then, maybe I can have it to myself! Steve has most of my models stored away for me. Nigel.
  13. I daren't get any more bits Terry as my available hobby time over the coming year will be quite limited with an impending house (bungalow) move. The 'new' place needs some TLC, which is great as the price was right and I get to make it just how I want it and a decent sized hobby room is on the cards You'll definitely need head tracking on the FPV explorer for when you cross the road from your place to the field There is a thread running on RCG about using the low cost RFM22B UHF modules for repeaters, can't find it right now though. I think it's muddled in with a thread running by 'fmkit' about his Nunchuck controllers with the RFM22B module... I'm playing with the OpenLRS on 459MHz and a homebrewed version of hardware using different software than the OpenLRS stuff. Time is my enemy right now. I'll still be watching the forums... Nigel.
  14. Hey Terry, don't despair. I'm in a similar boat to you (pun!). Been out twice this year and last year wasn't much better. I'm now moving house and will lose my workshop etc for at least 12 months before I can get a new one built as we intend to seriously modify the new property. I agree that there doesn't seem to be much interest in new ideas/concepts/innovations, other than buying them straight off the shelf. I commented in the posting regarding the demise of Heathkit - it's the same kind of problem, but in a different hobby. Maybe you could think about an R/C rock crawler/off roader with head tracking for the lad? as an underwater RV is going to be a challenge too far I think. I remember about 30 years ago (around the time of the Falklands conflict) the whole of the south-west pylon power grid was used for VLF communication testing with submarines. That would mean an antenna of maybe hundreds of miles in length to be able to communicate with submerged submarines ?! Maybe we should try to get out once this year before the jet stream moves back again !! Nigel.
  15. Personally, the Skew-Planar for ALL antennas (this way you could have a spare or 2 in case of damage). I already linked to probably the best in Europe http://www.circular-...ar-wheel/spw58/ If you arranged your diversity Rx's at either end of the track/circuit, you will have the best coverage. You can also use the Rx 'upside down' so that the antenna is looking down at the track. Doing this will elimintate the Rx from actually blocking the signal. 5.8GHz was almost unusable and written off as useless for FPV just a couple of years ago due to multipathing. It was the quest for better signal quality that drove us to find a better antenna and Circular Polarisation was it's saviour. With the investement you currently have in your setup, what is 6 x 35 Euros going to add to it in terms of percentage? Really, going from linear polarised to circular polarised antannas is like the difference between night and day. Do you have 2 cars on track at the same time and both using 5.8GHz? If so, opposite hand circular polarisation and different transmission channels will help immensely. Choose Right Hand C-P for one setup and Left Hand C-P for the other (another good reason for converting to Circular-Polarisation). If you contact Circular-Wireless, they will custom make you such a set of antennas. https://www.circular...ss.com/contact/ Nigel.
  16. Almost certainly the majority of your problems are antenna polarisation and probably your screen not liking video loos and 'blacking out'. Here is a good video that enables you to 'see' the problems with antenna polarisation A good manufacturer in Europe is circular-wireless http://www.circular-...ar-wheel/spw58/ HTH and please let us know how you get on. Nigel.
  17. I guess this is fairly typical of a lot of things these days where we have become mostly 'consumers' and there is little interest or fascination in 'looking inside' or making something for yourself. One inspirational idea that may change some of that way of thinking and actively encourage the younger generation is the Raspberry Pi. http://www.raspberrypi.org/ The hope is that the schools will take up the idea (as it's so cheap) and encourage kids to delve into things and bolt on peripherals to actually make something for themselves instead of just 'consuming' and buying a finished product. Doesn't help Heathkit though Nigel.
  18. I measure 3v3 at the Vreg output - correct? Therefore, 5v input should be fine. RSSI is ~2.7v max and the display seems to be working OK on a bench test. Nigel.
  19. Thanks Thomas. Still at work here I think the RSSI signal is under 3v so will try as is (I'll check first). If not, LDO Vreg it will be. Nigel.
  20. Hi Thomas, Is it possible for me to 'mod' this to run from 5v (as opposed to the 7 - 14 v ) I want to use it on an R/C Rx to watch the RSSI and use a std servo connection (including the 5v supply). I'm at work so can't check the voltages on my board, but better to ask first before hacking away. Nigel.
  21. I am repairing a KX-550 / KPC-VSN505NHB / SN777 camera for a friend (yes, really!). For clarity, it's this one... http://www.firstpersonview.co.uk/cameras/sn777-kx550-5v-sony-13-ccd-550-lines-0.05-lux He connected it to a 12v supply instead of the required 5v by accident and let the magic smoke out. The pics below are from a known good camera I am using for comparison/checks. One LDO regulator was obviously burned (Z330J in pic below) and I replaced it with a TC107R - a 3v3 LDO. When applying 5v, the camera now produces a black screen on my LCD, but no image. This image has been resized. Click this bar to view the full image. The original image is sized 1024x768 and weighs 134KB. When checking against a known good camera, I found the chip ( IB3AE in the pic below) has different voltages. This image has been resized. Click this bar to view the full image. The original image is sized 1024x768 and weighs 93KB. Voltage readings are: Top 2 pins 4.8v on both cameras Lower left pin, good cam =2.5v bad cam = 4.7v Lower right pin, good cam = 1.25v bad cam = 0.3v Lower centre pin is ground The input connector is at lower right of the above pic and the very bottom right pin is the 5v input. The lower right leg of IB3AE goes to a via and re-appears as marked in the first pic and connects to a resistor (lower right of pic). Anyone any idea what the chip IB3AE is and a suitable replacement? Nigel. The above is a cut/paste of a post I made on RCG, but was rather hoping MR RC-Cam and others might have an input...
  22. I've just started 'playing' with the Chinese Sky-RF based 5.8GHz video gear and setting it to the EU ISM band. Also got involved with the UHF 'OpenLRS' from Flytron and setting it up for 459MHz for UK legal use - now fixed. I seem to have too many projects and not enough time to fly - although the weather has been pretty useless in the UK this year - if it wasn't raining, then the wind was too strong whenever I had the chance to get out. I found myself in the same situation as Kilrah, half my gear was never ready when the sun did come out! So, new years resolution, no more excuses... Nigel.
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