Electronics > Projects, Designs, and Technical Stuff
Radio Direction Finding
PA3BNX:
Hello Every Body,
I have done some building for the 4017 SuperSimpleSoundDoppler.
PA0CVW did some print art work
and I did also some PCB work.
We did this in Paint !
There is a jumper on the board that's used for
3 of 4 monopoles or dipoles Doppler antennas.
So it's also easy to have a 3 antenna direction finding system.
PA8W is working on a 8 antenna Doppler direction finder with soft switching
So we hope to get that working soon.
So have fun,
There is also a new version SoundDoppler124cAll.zip on the PI4WAG site.
Soon there is version SoundDoppler124eAll.Zip
I added MyMapping137 with Waypoints
And I fixed a Bug in SoundDoppler124 SinCosDetector.
And added a Error message for the referency if something goes wrong
with the hardware connected.
I did build a 4017 SuperSimpleSoundDoppler in a blue PCB box
with speaker.
Daniel_DB9:
Hi Lodewijk!
Thanks for that amazing Software!
In the moment i use a Ramsey-2-Sounddoppler with 4 Dipols.
I builded up a 2x4017 PCB for 12 Antenna-Switcher an 12 Dipols with 2,66m in diameter.
If you wish, i can give some Photos or Layouts in KiCad.
I have a wish for the Sounddoppler-Software, can i start? By the way... of course not now, step by step, if you think it makes a sense.
- KML-Log saves in a day-folder and then in a hour-folder for a defined time period.
Edwin PA7FRN set a test account at his website for me and it works very well!
One Question i still have...
GPS for mobile-use. Can i use any USB-GPS Receiver that emulates a COM-Port?
best regard
Daniel
PA3BNX:
Hello Deniel and others.
I saw that you want to use the DL5DI URL protocol
and you cannot change the URL.
I do not use this myself but I will check the code
and make it possible to change the URL
So here I piece of the subroutine I use.
--- Code: ---Public Const strcURLdl5di As String = "http://db0myk.prgm.org/peiler.php?"
Public Sub DL5DI2HTTP(ByVal MyDegrees As String, ByVal MyAgrelo As String, Optional bMu As Boolean = False)
''ToDo
''@26-04-2011
''@18-08-2011
''@26-08-2011
''Static string
Static OldDegrees As String
''Const string
Const RDigits As Integer = 5
Const p As String = "p1="
Const d As String = ","
''String
Dim a As String
Dim MyUrl As String
''Nothing ToDo
''Example http://db0myk.prgm.org/peiler.php?p1=52.21667000,5.16666700,25.0,45
''Also check for Callsign
Select Case strArrayPacket(1)
Case strNoCall, ""
bDL5DI = False
Form1!mnuDL5DI.Checked = bDL5DI
OldDegrees = ""
Exit Sub
End Select
''@14-09-2011
''To Many ZeroCrossings or nothing in averaged
If bMultiDetecting Then ''Never draw if MultipathDetect + Agrelo
If arrMulti(3) > 1 Or Val(MyDegrees) = cNoDegrees Then
Exit Sub
End If
End If
If bMu Then Exit Sub
If OldDegrees = MyDegrees Then Exit Sub ''If degrees the same as last time do not send data.
If Val(MyAgrelo) = 0 Then Exit Sub
If MyDegrees = strcEmpty Or MyDegrees = "" Then
OldDegrees = MyDegrees
Exit Sub
Else
OldDegrees = MyDegrees
End If
MyAgrelo = LTrim$(MyAgrelo)
''Factor a is the deviation according 2 lines beside the bearing in degrees
Select Case MyAgrelo
Case "1", "2", "3"
a = "90"
Case "4", "5"
a = "45"
Case "6", "7"
a = "22.5"
Case "8", "9"
a = "10"
Case Else
''Nothing ToDo
Exit Sub
End Select
If bGps Then
If GPSVal = "A" And Val(GPSKnots) >= Val(strArrayPacket(5)) Then
MyUrl = strURLdl5di & p & Round(strConv2Decimal(GPSLat), RDigits) & d & Round(strConv2Decimal(GPSLong), RDigits) & d & Val(AddCompassValue(MyDegrees)) & ".0" & d & a
Else
Exit Sub
End If
End If
If bGps = False Then
MyUrl = strURLdl5di & p & Round(strConv2Decimal(strArrayPacket(3)), RDigits) & d & Round(strConv2Decimal(strArrayPacket(2)), RDigits) & d & Val(Conv3(MyDegrees)) & ".0" & d & a
End If
''Debug.Print MyUrl
Call GotoUrl(MyUrl)
End Sub
--- End code ---
So here I piece of the subroutine I use.
I will check and try to test these routines and make changing the URL possible where the error is of the URL changing.
Yes I can add also the Quality just tell me how the URL string has to look.
I will do tomorrow some testing and I let you know when the new version
is there.
Currently I was working in MyMapping1.38
To get all the remote and local control functions right for the FT817 through a cat62 cable.
I am also planning to make a station data base in MyMapping139.exe
So know stations with there name location pwr frequency etc.
We are also working on a new PCB design.
Two SuperSimpleSoundDopplers on one eurocard.
PA3BNX:
Hello Everybody,
Today I did fixed the DL5DI error
Now you can change the URL
And I changed the URL Line
I added the Quality factor to.
So If you see SoundDoppler126.zip on our sites that's fixed.
I also discoverd a zero crossdetector error in sounddoppler 125
Because some time agar i did improved the SinCos Detector
and i made a mistake with a global variable.
The version 124 en 125 Will only work with zerocrossdetector from 0 to 180 degrees hi.
But Now it's fixed
The new option FM avg average FM audio signal is very good for the
software squelch.
The squelch wont open on short loud bursts in the FM audio noise anymore.
Also has the MyMapping139.exe good working FT817 Cat control with 10 memory channels to.
PA3BNX:
Hello Everybody.
Here I did find something that is of intrest for us
A WirstWatchDF finder
http://wirelessinnov.com/documents/WRISTBANDDFSYSTEMAPRIL122011.pdf
Very Nice
Further the SoundDoppler127aAll.zip software is there
It has better software squelch and in MyMapping it has advanced Waypoints
called Transmitsites.
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