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robojet

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About robojet

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    RC-Cam Visitor
  1. robojet

    Wanted PDC10

    Yes. There are a couple of autopilots similar to the PDC-10. The RCAP is open source and available as a kit and the AP4 with altitude hold is usually available on ebay.
  2. robojet

    Split screen Video?

    The easiest way might be if you have four of the same cameras and could disconnect three of the ccd clocks and run all four of the cameras off one camera's ccd clock. Then use a 4-way switch like a 4066 silicon bilateral switch controlled by a PIC to toggle between the four cameras at the desired time. Of course, you would only see one quarter of each camera's viewing angle, but otherwise you would need to FIFO buffer the pictures from all four cameras to phase correct them. If you want full viewing angle, then you might want to look for a ready-made solution, because that is a lot of work.
  3. robojet

    Next Generation A/P Camera Controller

    That sounds like it would work good for targeting air-to-surface missiles too. How about doing a graphic direction system like the MAHI that would help a pilot line up a shot to a target's gps coordinate using trigonometry.
  4. Anyone know if the high resolution imaging chips like used in digital cameras can be controlled by a high speed microcontroller and the video signal sent through an ordinary video transmitter (at normal bandwidth, but slower syncs) without digital processing, and an image be reassembled at a slow frame rate (like 8 fps) in a computer on the ground? Might be simpler and lighter than MPEG encoding.
  5. robojet

    Altitude Holder

    thunder, There is an altitude hold autopilot on ebay http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...item=5956833711 and Mike P. in Canada has built a barometric hold, but I do not know if he is selling them. How accurate do you need the altitude? Since you already have a gps, you can probably use it's satellite altitude data.
  6. Most RS232 modems are only around 19.2K baud, but some of the better ones can do 232kb. It may be difficult to use walkie talkies, because you may need packet modems and a full-duplex radio for fast error correction of data, but I have been thinking of trying two pairs of walkie-talkies and streaming compressed images, since the high power RS232 modems can be expensive.
  7. If you could settle for 1 fps frame rate, you might be able to use a digital camera through a cellular phone or an RF modem. Otherwise try to setup a more sensitive receive station with a directional antenna.
  8. robojet

    Flying FPV at night.

    Congrats on another great FPV flight! What type of camera do you have? I am using a KT&C KPC-S20BHEX which is supposedly .0003 lux @ f1.2 but came with an f2.0. It has a good sensitivity ccd chip, but the signal processing chip doesn't seem to increase the gain very much in real low light to near the dark noise level as some other cameras do, and without much success using the datasheets to mod the chips, I have tried adding an op-amp to boost the contrast. I have only driven with it on a model car as of yet, cause I am too afraid to fly at night without lights.
  9. robojet

    autopilot for RC plane

    ep92 exports autopilots see the AP4 (similar to PDC10) on ebay http://cgi.ebay.com/ws/eBayISAPI.dll?ViewI...item=5937080683
  10. Kilrah and Terry, I haven't tried downloading pics wireless with a usb host, but I use a camera with a serial port and it takes 10 seconds to 3 minutes to download a pic depending on the resolution through the audio channel. I am looking into upgrading to a direct synthesizer and modulating the video channel for faster pics. I will send you a picture of it if you are interested.
  11. There are quite a few good low weight cameras with video out if you search the net. I use a Sony DSC-P2 (older 2MP) with the video transmitter to line up aerial shots, but I tend to dislike flying back to the field for landing to see if the picture blurred or lined up, so I setup a terminal node controller to download the pics over the audio channel before landing. I do like the Pentax Optio's ISO settings which gives sharp motion shots, but every camera has its strengths and weaknesses to consider.
  12. robojet

    UAV/RPV meet

    Dave, I live in Sarasota, FL. and fly UAV's and would like to help with such an event in the southeast. I know about a dozen UAV flyers here in Florida who I'm sure would be interested.
  13. I have been playing around with a TinyTrak and noticed that the resolution of the NMEA data is in increments of .0001 minutes, which calculates to 0.093 m in latitude, and 0.093*cos(latitude) in longitude and if two identical GPS units are operating in the near vicinity, it seems like it would open many possibilites for an auto-landing plane or putting a giant scale servo on the steering wheel of my full scale truck and take a trip with a manikin behind the wheel. Does anybody know what the actual performance of differential correction data on an ordinary GPS is? Seems like it would be accurate to within a meter unless tall buildings might interfere with the signal or the receivers were listening to different satellites. Kyle
  14. robojet

    RFI Sniffer?

    Jim, I too was really curious how much RF power transmitters were really radiating, and looked around on ebay. For around $90 you can get a detector thas has a good gauge so you can see different power levels, but being a hobbyist I ordered a sample of a 3 ghz RF logarithmic detector IC from Analog Devices http://www.qsl.net/n9zia/wireless/appendixF.html#8 and they are very easy to hook up and you can use a digital voltmeter for displaying the power level and it requires almost no external components (just a stub of wire to input the RF). Kyle
  15. Kim, Are you interested in a ready made unit like Tinytrak or building something yourself? I am not sure if there are any devices on the market that can do exactly what you want, but if you are able to program microcontrollers there is source code available online (search on google) that will generate APRS or similar FSK signals with your microcontroller and it can be fed through the audio of a transmitter and received by a computer with sound card. Regards, Kyle
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