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Everything posted by jonpet55

  1. Ok, thanks for the reply. I will fly non-acrobatic and distant. Another problem just popped into my head: The rotor will be refreshed a little less than once a second, so when landing near the rotor, it can get problems following the fast motion. This could be solved by a low gain antenna not being controlled by the rotor, fed into the diversity-controller along with the other high gain antenna. Again, I am wondering if this is neccesary... When the plane is so close to the high gain antenna, I'll guess it will get a good signal strenght no matter where the antenna points.
  2. This schematic explains my setup much better...
  3. I am currently working on the ground station for my FPV-project, and need help to decide whether I need a diversity receiver system or not. About the project: The transmitter will transmit video from a KX131-camera with overlay from a custom made BOB-4 based OSD on the video channel, and APRS-packets from a TinyTrak3 on the audio channel. The APRS-packets will be used to calculate azimuth and elevation for the receiver antenna(s). I have built Bob Ball's PIC-based TNC, and is allmost finished with the rotor controller and az/el-calculator. The software is made using basic for PIC micr
  4. Ok, i was actually wondering if it was easy to change the baud rate on the DragonOSD, not the GPS. Jon Petter
  5. Thank you for your great answer and the positive feedback on my project! I think that answered about everything I thought was unclear. The 4011 is aviable in both TQFP44 and DIL40, so you could actually breadboard the 4011 too, but then size is the problem... The 4012 is aviable in DIL28 and SOIC28. SOIC28 is not that hard to solder (while TQFP is close to impossible to solder by hand), so I think i will go for the 4012. By the way I use an Olimex programmer too; the PIC-PG1 (I'ts on time buying a new one). I bought a FMA Co-Pilot yesterday, so i'll combine it with the DragonOSD. I have
  6. Daniel Wee, i am really amazed by your project. The 5Hz GPS combined with pixel-resolution scrolling on the compass, and with UAV-capabilities too, makes it the best OSD-solution aviable in my opinion. I would like to build my own right away. What programmer do i need for the dsPIC30F-series? I use a lot of PIC16-series microcontrollers, but i guess my simple JDM-programmer is not enough for the dsPIC30F-series. I can see you are planning on using a 4011 instead of the 4012? I sampled both from Microchip, the 4011 in standard PDIP packaging, and the 4012 in SOIC packaging (maybe i'll make the
  7. Thank you for your response! Hartwig: The dew will appear on the inside of the plexiglass, and i thought about using a demoisturizer. The problem is that some of the components generate a lot of heat, and without moisture there is nothing to carry the heat away. That would of course cause the components to overheat, but other components with low power consumption would also be too cold; i use standard rated components which is unable to operate under 0 degrees celsius.
  8. Thank you for your reply. The camera has a 4 mpix resolution, and the pictures are shrinked very much. The main problem isn't resolution, but pictures of the horizon at this altitude is heavily blurred by the atmosphere, especially because the weather was hot and moist when the payload was launched. I also had problems with dew on the plexiglass which the camera took pictures through, mainly because of the huge difference in temperature inside and outside the payload (-70 degrees celsius outside and 20 degrees celsius inside). If the camera had a more sensitive CCD, it would certainly help too
  9. I just found out that my high altitude balloon project could give much inspiration in this forum, so i have decided to share it here. I was thinking whether it was relevant or not, but i soon found out it certainly is. It is radio controlled, its goal was to take aerial photographies, it transmits telemetry, it transmits live video in FPV, and it flies. I hope it is ok to post it here. Ok, to the project: The primary goal with this project was to send a payload carrying a camera to an altitude where the horizon fades from blue to black, i was hoping to archieve up to 100 000 feet. The
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