Electronics > Projects, Designs, and Technical Stuff
Radio Direction Finding
PA3BNX:
Hello Every Body,
Still working on my updated GPS112.exe program with
modified $GPRMC output through another or the same comport as where
the GPS-mouse is connected.
It takes more time than I thought.
Here is a picture of my Datong Doppler with additional
Lowpass filter on the clock for the reference of SoundDoppler.exe
(pin 12 of the 4060 chip)
This option is nice because I have the hardware 16 led display
and a connection to the pc through the SoundCardInput.
PA3BNX:
Hello Every Body
Here I show you pictures of
a datong antenna-switcher-unit with the
ne555 power supply print
and the 4 dipoles.
PA3BNX:
Hello Everybody,
I send the antenna switcher circuit in PDF of the datong doppler.
It has only one coax to the switcher unit only with the RF, Power and Reference tone.
Can some body make improvements ?
Today I worked on a new function in the InputXY scoop in my SoundDoppler.exe
So it can adjust and line up the green and yellow vertical line op on
two adjacent zero crossings from the reference (upper left channel) if you
press the middle button of the mouse or mouse wheel.
Further I am doing more modified $GPRMC string manipulations out in GPS112.exe
So still a lot of work to do...
PA3BNX:
Hello Every Body,
I show you a picture of my gps112.exe program
witch can send out the $GPRMC out modified with
gpscompass + doppler heading
It has also a seperate Terminal Out screen
I did already got test reports from people who have it working with
other mapping route programs.
If you click on the latitude or longitude labels
it switches between decimal degrees(Yellow) and degrees and minutes (white)
PA3BNX:
Hello Every Body,
I hope the new SoundDoppler119 Gsp112 and MyMapping129
is soon on the site of:
http://www.pi4wag.nl/index.php/pseudo-doppler-radio-direction-finder
GPS112.exe has Terminal Input and Terminal Output screens
with freeze option.
And all the options of what to send from com1 to com2
with Modified $GPRMC for other map plotting programs.
You can also input gps from gps with mixed Agrelo %bbb/q
and then output that through Modified $GPRMC to all kind of mapping programs.
Remark Modified $GPRMC means:
The GspCompass value is changed in GpsCompass + Doppler heading
And a new CRC is calculated in the standard $GPRMC string
So if you have a Pico Dopp RDF or a VRZA2011 RDF
You get many options.
Mymapping129.exe has also this possibility
Mymapping has complete GPS decoding routines
And can send out Modified $GPRMC from GPS and agrelo mixed.
So enjoy
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