Hello,
http://www.f1afz.fr/satellites/satellites.php
73's Christian F1AFZ
http://www.f1afz.fr
F1AFZ sur Twitter : http://twitter.com/f1afz
-E-mail d'origine-
De : Kevin Muenzler, WB5RUE ke...@eaglecreekobservatory.org
A: amsat-bb amsat-bb@amsat.org
Envoyé le : Ve, 22 Fév 2013
There has been some work done with wireless routers and amplifiers in several
balloon flights in association with the Wx bureau. A group which I am a part
of got the equivalent of an SBIR from a federal agency to do this work (plus
they helped us get on the balloons. There is no secret here
I have an old 726 that I'm parting out. The band modules are headed for Ebay
today, but if anyone needs another part, please let me know. Unfortunately, no
satellite board or CTCSS encoder. No guarantees any of it works, but the price
will be right. The radio did power up but had low output and
Hi, about two years ago, I started a design for a robotics class project of
a AZ-EL rotator controller system, and a hardware package for the mechanism
for rotating an antenna in any direction subject to mechanical stops. The
system would have been able to handle regular and flip modes. I didn't
Hi Samudra,
See: http://home.wavecable.com/~ko6th Near the top of the page, on the
left, are links to the design document and code source for what I
created. It's not a kit, but rather a discusson of the various pieces
needed to make such a controller, which you can adapt as needed to
Thank you Greg and Art for your suggestions. I'm interested to pursue the
standard mechanism (AZ-EL rotors) but also want to inquire about any recent
robotics work in this area ? A 2-link robot with a rotary joint
manipulator that would point an antenna , could be a candidate solution -
with no
Samudra and the gang,
The bee's knees would be an Arduino Mega 2560 talking over one of it's
serial ports to the pc. Using the output of the Orbitron (or insert
your fave rave software here) DDE server to drive the microcontroller.
There are enough digital/analog pins to drive/slave anything from
Given the shortage of LEO birds, exactly how much antenna do we need to
rotate?
Hams operate satellite successfully with hand-held antennas, which have
low wind-loading and are light in weight.
With R/C servos available producing 6½ ft. lb of torque for less than
150 bucks, I'm surprised a
I think AMSAT-UK even has software available.
And with the addition of a bit of EEPROM, you could even pre-load the
controller with ephemeris data for several satellites for several days
in advance. Emergency / field-day / portable operation without needing
a computer.
Add a bluetooth
Gus and the group:
Lots of birds going up in the next year. Success rate not 100% as it's
rocket science oftentimes on a budget. Hopefully we'll get a few out
of it.
The Arduino IDE install supports PPM. The nice thing about that
platform is that configuration is doable for just about all forms of
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designing, building, launching and
Gus,
These days is the hardware can all be made to chat with other bits of hardware.
Doesn't matter which IDE/mfgr that gets chosen for the product we're
talking about. Most these days can be made to do the same thing with
some code.
You bring about a good point. A contraption (az el rotator) can
I hope it is evident, I am not focusing on the
controller/microcontroller/computer interface/az-el controller/etc. The
real issue is how cheaply can an antenna be mounted on a kingpost somewhere
on a surface, with a view towards the sky, and how conveniently can that
mount be motorized, with a
Samudra,
This is a good question for a first year engineering student like
myself: How does one bring home the best bang for the buck out of an
engineering dollar?
Feel free to ask around. A few on the list have driven unusual devices
to get antennas moved.
How does a project get into the hands
hi, thanks for addressing this question. And I invite others to
participate, or get in touch with me for a phone conversation, and discuss
simple steps that can be taken IMHO within 50-100 USD. I suggest we adopt
AMSAT friendly tips:
http://www.amsat.org/amsat-new/tools/downloads/iROTOR.pdf (will
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