Search found 41 matches

by skyscraper
Fri Jan 23, 2015 8:03 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Hi, Its been a while, but work on the DIY tracker is ongoing. Since last autumn I have been working on an OSD, which sends data to the tracker using unused parts of the Video signal. The Hardware uses an STM32F4 rather than a dedicated video ic, so allowing it to do vector graphics: [BBvideo 425,350...
by skyscraper
Fri Aug 15, 2014 4:18 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Now managed to get the FSK demodulation done in software oboard the STM32F4 on the ground side to compliment to software conversion to FSK on the airborns side. Airborne side conversion to FSK source Ground side demodulation source Tested to around 1km on my 25 mW 5.8 GHz Vtx and works pretty well. ...
by skyscraper
Tue Jul 22, 2014 4:12 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

A couple of bits of progress on the project. First managed to get the FSK telemetry via the audio working... [BBvideo 425,350]http://www.youtube.com/watch?v=85SXBYkTdV0[/BBvideo] Second got to understand the HMC5883 magnetometer a bit better [BBvideo 425,350]http://www.youtube.com/watch?v=-n6azgfXCR...
by skyscraper
Sat Mar 22, 2014 9:12 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Hi Kaos, It looks OK. Adding the impedance match is just a question of soldering on the little square of tin. It isnt critical but has to be about the right position off the base. around a 1/4 turn round. The only problem may be kewping the wire in place, but you could use the former off my tin can ...
by skyscraper
Tue Mar 11, 2014 9:18 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Hi Kaos. If the Helical doesnt work you can always use the wire and make my DIY one! But otherwise we will have to figure out the rules of the challenge. As for prizes, I will have to have a cup of tea as I'm teetotal! A guy on fpvhub.com (my local fpv forum) has just posted maiden flight pics of hi...
by skyscraper
Fri Mar 07, 2014 10:36 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

http://www.circular-wireless.com/en/products-page/helical-modo-axial/heliaxial58/ But they are quite pricey :-) Sent from my GT-I9300 using Tapatalk I'd love to do a head to head against my tin can one to see how much better they are. They would have to be quite a bit better to sway me from my tin ...
by skyscraper
Fri Mar 07, 2014 10:30 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

getting there. ;) I was test making a helical antenna using a 0.8mm MIG wire (the only wire i have laying around) with your template to get a feel. found the MIG wire is too stiff and after winding through the template it ended up with a 2cm diameter helical. :P It won't stay centered around the pl...
by skyscraper
Thu Mar 06, 2014 11:48 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Here is a picture of the extension board for the tracker on the ground. It plugs into the Discovery board and a IDC connector plugs in to that for most of the I/O. As you can see I am using my original Tracker for testing, so as to keep my V2 for flying. The board in the pic is double sided single h...
by skyscraper
Tue Feb 25, 2014 11:18 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Hi Leo, Its true that the code isnt Arduino compatible. However if you want to persevere then you could try writing a raw C or C++ application (e.g Hello World ) . To compile and build the application you already have a C/C++ compiler.. Its the avr-gcc that Arduino uses (On my system the compiler is...
by skyscraper
Thu Feb 20, 2014 5:13 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Hello skyscraper, Does your code parse the standard NMEA messages? If so, I think it would be possible to tap the serial connection between the gps module and the i2c-gps-nav. At least in my setup the i2c-gps-nav is only parsing the serial NMEA messages that are coming from the gps. Regards, Leo Hi...
by skyscraper
Thu Feb 20, 2014 12:00 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Take your time. I have not found the tin can yet. :mrgreen: Thanks for that kaos :) Ah yes. You need to select your tin can carefully ! I am also currently looking at how to make connections to the discovery board more practical. So I'm going for a piece of double sided veroboard (the type with ind...
by skyscraper
Wed Feb 19, 2014 9:46 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Hi LeoLeo, As it stands the option to use the audi channel of the video link isnt complete yet. Ive done some pcbs, but not the software. I'm currently working on adding a magnetometer to the ground side and I hope once that is sorted, I can get straight on to finish the code for the airborne unit. ...
by skyscraper
Thu Feb 13, 2014 10:36 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

You can would also need to watch your polarisation. When the signal bounces off the dish, it would swap from right to left etc... Rob Sent from my GT-I9300 using Tapatalk Thats a very good point which I hadnt thought about! but Its no great problem. My helicals dont cost much... zoomworks DIY helic...
by skyscraper
Tue Feb 11, 2014 7:44 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

kaos: regarding the airborne unit. Yes it has a "command line mode" so you can configure it by plugging it in to a serial port. There is an eeprom on the board to save your settings when you switch off. Maiden flight of your Falcon cant be far off now? :) re the diversity (2 video receivers) I've do...
by skyscraper
Sat Feb 08, 2014 11:36 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Falcon looking good. landing gear should work well fro the maiden if you have a runway to launch from too! The airborne unit is designed to take "some form of serial GPS input" and then to send it out to "some output channels" which then transmit it to the ground. The some form of inputs I currently...
by skyscraper
Fri Feb 07, 2014 8:58 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Currently Work in progress on the tracker V3 includes a new airborne unit, a 3D printed case and adding a compass to the ground side. I'm trying to do all 3 in parallel so its taking a while. Here anyway is a video of work so far on the compass... Tracker compass work in progress regards Andy
by skyscraper
Wed Jan 22, 2014 9:56 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

here is a vid of some testing of parts for my V3 antenna tracker. I am planning to make as many parts as possible for this one on a 3D printer. I hope that way to reduce the cots and also the size. (Sorry about the poor video quality.. done on my phone...) Video of pan gears and motor test piece fo...
by skyscraper
Wed Jan 22, 2014 9:51 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Now I need to spend $900.00 to buy a 3D printer to make the tracker! 8-) ] :lol: You can still use ply. Even with upgrades I hope things will be compatible. But you have to buy the gears which tends to fix the motor size etc etc.. If you can get access to a printer, the 3d printed version shuld be ...
by skyscraper
Tue Jan 21, 2014 12:36 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

here is a vid of some testing of parts for my V3 antenna tracker. I am planning to make as many parts as possible for this one on a 3D printer. I hope that way to reduce the cots and also the size. (Sorry about the poor video quality.. done on my phone...) Video of pan gears and motor test piece for...
by skyscraper
Mon Dec 23, 2013 11:03 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Weird~~ how did that 'Skylark Falcon' name and shape popped into my head?? :? Never saw/heard that before until I 'thought' I saw in your video. :? Must be 'godsend' X'mas gift for me. :mrgreen: ordered one any way. I like that shape and size, with a little mod, it has good potential for medium ran...
by skyscraper
Sun Dec 22, 2013 8:04 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Thanks for the compliments on the 1.35 km flight with 25 mW Video transmitter! It is partly down to the Immersion Uno V2 video receiver, which is more sensitive than the previous model. I think it should easily be possible to improve on it since there was very little video break up and the main worr...
by skyscraper
Fri Dec 20, 2013 12:54 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

OK, after reading Skyscraper's web site regarding all the components needed, all are listed as UK or Euro store which is hard/heavy shipping cost to US. So I compiled a list of the components that are available to US for anyone who is interested. If there is any wrong/incompatible components, or ch...
by skyscraper
Tue Dec 17, 2013 10:03 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Great stuff Will add the pricing and links to materials to my website. As regards the data protocol, It would be nice to get One Open protocol for this task! To start the ball rolling, I have written some info about the protocols I am using for the tracker. Zoomworks Aircraft Position Protocol The Z...
by skyscraper
Mon Dec 16, 2013 9:54 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

Skyscraper: in regard to mavlink to frysky conversion using Arduno. Does that only convert Ardupilot mavlink data? or multiwii will work as well? also, does that only convert GPS data or all the telemetry data from the FCB? I can't figure out from the linked source site. IF that works for multiwii ...
by skyscraper
Sun Dec 15, 2013 9:06 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

[...] As for 180 degree tilt, i am thinking if I fly on top of a hill while flying the plane on the bottom of the hill or flying over a cliff while the tracker is at the edge of the cliff, then the tilt needs to go further than 180. ;) I would like to see the tilt can point downward as far as physi...
by skyscraper
Sun Dec 15, 2013 9:20 am
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

ah, you are all thinking servo centering. I am thinking a stepper motor. There is no centering for pan, once it is indexed on start up. it just changes by the GPS difference for 'relative' Azimuth and elevation in relation to 90 degree/straight up. Rob: good move of the topic. I guess we are side t...
by skyscraper
Sat Dec 14, 2013 4:15 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

the AAT system is using a magnetometer in the set up to set 'home' location and orietation. I am not sure I know exactly how that works. But it can be affect by magnetism of the electronics in the control box and environment. Here is my thought: if the software can store a GPS location as reference...
by skyscraper
Sat Dec 14, 2013 4:10 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

Re: DIY Antenna project with FrSky Telemetry

With reference to http://www.zoomworks.org/fpv/antenna_tracker/index.html It does seem a bit slow in response (unlike your signal strength version), the plane actually flew by only once that I could see it in the video and the tracking lag was probably about 2 seconds. It's a pity that there was no...
by skyscraper
Sat Nov 30, 2013 6:39 pm
Forum: Other Electronic Projects
Topic: Convert PWM to Voltage for RSSI
Replies: 25
Views: 24486

Re: Convert PWM to Voltage for RSSI

FWIW Here is the schematic for my circuit for converting the output from a D4R-II used in PPM sum mode. http://www.zoomworks.org/electronics/circuit_ideas/FrSky_RSSI_toAnalog_circuit.png The FrSky RSSI PWM frequency was measured as 110 kHz. The output voltage varies between 0 and 3.3 V ( well actual...
by skyscraper
Sat Nov 30, 2013 1:30 pm
Forum: FPV Projects
Topic: DIY Antenna project with FrSky Telemetry
Replies: 99
Views: 48031

DIY Antenna project with FrSky Telemetry

Here is a link to my website with some documentation of my antenna tracker project which uses FrSky telemtry to get the aircraft position data. http://www.zoomworks.org/fpv/antenna_tracker/index.html There is also various source code associated with the project, which I hope to eventually combine in...

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