-------- Original-Nachricht --------
Datum: Sat, 19 Jul 2008 19:03:02 GMT
Von: "address@hidden" <address@hidden>
An: address@hidden
Betreff: Re: [Paparazzi-devel] recommendations and advices for my first paparaz zi-project
Tim,
Avoid brushed motors - they are weak, produce significant electrical interference, and change performance with age, making altitude tuning difficult.
Also avoid nicad batteries for most of the same reasons.
Twinstar is a great airframe to start with but Minimag and Funjet are much more manageable alternatives (and cheaper to upgrade to Lipo/brushless)
Aerocomm modem will not really go 15km but it is of little consequence since the 200mW video is limited to a few km. You can connect the aerocomm directly to a FTDI cable and put it in any common electronics box (plastic or metal) for your ground modem.
-- Tim Hansen <address@hidden> wrote:
Hi,
I want to build my first paparazzi aircraft. It would be nice if you
could look over the following list and tell me if you have any
suggestions or recommendations.
I took two frequencies for data and video (868 MHz and 2,4Ghz) to avoid
problems.
What I already have:
* R/C Controller with 8 Channels (40 MHz) and a 3 state switch
* 8 Cell Ni/Cd battery pack
* R/C receiver with 8 Channels (40 MHz) (I looked into it and found
the 4017 IC so I think it should be fine)
* Equipment for measuring, soldering and so on
Although I have the RC Controller I'm a total beginner.
What I'm planning to buy is:
Airframe:
Multiplex Twinstar II
including 4 servos and controller
for 157 Euro at www.hobbydirekt.de
Autopilot
Tiny with LEA-5H GPS
including IR-Sensors
fully assembled
for ~240 Euro at shop.halfbase.com
Gyros / IMU
-> Are they necessary for a good performance of the autopilot ?
Modem
Aerocom AC4868-250
250mW @ 868MHz
80$ = ~ 50 Euro @
http://www.mouser.com/search/ProductDetail.aspx?qs=sowTOPtLBlim5ghEh48l5Q%3d%3d
-> I'm interested in the 15 km line of sight communication
Ground Based Modem
again the Aerocom AC4868-250 as above,
-> I haven't found any module with a metal case (stand alone module
for 868 MHz)
-> If you know where I can get the stand alone module please tell me
Video Transmitter and Receiver
200mW @ 2,4 Ghz
150$ = ~ 95 Euro @
http://www.microcameras.com/video_transmitters/TM_240200_video_transmitter.htm
Camera
12mm x 12mm x 12mm
Color, 370 Lines
80$ = ~ 50 Euro @
http://www.microcameras.com/micro_cameras/mini_color_cmos_camera.htm
Alternatively I have another video solution but with a bigger camera:
Camera
Color
470 Lines with night mode
32mm x 32mm
MTV-53X10HP-K @
http://www.lechner-cctv.de/artikel_einzeln.php?KAT=72&NR=41&LANG=DE&mwdSID=326hdscfsqn93aaqt1kfv6cjb5
Video-Transmitter
FM2350TSIMP + external Control Chip
200mW @ 2,4 GHz
66 Euro @
http://www.lechner-cctv.de/artikel_einzeln.php?KAT=95&NR=194&LANG=DE&mwdSID=eheevg5ue9a6edkto25boeahc2
Video Receiver
90 Euro @
http://www.lechner-cctv.de/artikel_einzeln.php?KAT=114&NR=6&LANG=DE&mwdSID=eheevg5ue9a6edkto25boeahc2
alternatively
50 Euro @ http://www.acwsoft.de/acw_funk3.html
Do you have any experiences with the different systems and dealers?.
I'm open for ANY recommendations.
I live in Germany so I can't use the 900Mhz modems.
Thank you VERY much
Tim
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