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Radio Direction Finding
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PA3BNX:
Hello Every Body,

I did again some updates in the Arduino SuperSimpleArduinoDoppler Sketch

The last version had a bug in MultiPathDetect in the Average Function

And now the CW/CCW with the max232 and the AM plate antenna works too

You must rename I think the file to Arduino4.txt to Arduino4.ino

for the Arduino IDE

Have fun Guys/Girls
PA3BNX:
Hello EveryBody,


I  added an analogue meter Pelorus readout on the arduino doppler project.

So I connected an analog meter about 100 to 400uA with a 10 k series resistor
and a series 10k potmeter on pin6 arduino (must be a PWM pin value 0-255 0> 4.5V)

Now with the new software I have a readout on the meter of

180-270-0-90-180 degrees voor homming in in the car.

(Draw a new scale paper and glue it in the meter)

I also use the standard led13 on board of arduino uno r3 now for
squelch indicator open/closed.

You can leave the refpa3bnx circuit connected like I did

Ony set in the arduino source

const bAnalogPelorus = true;

If you would use a cheap audio VU meter from scrap equipment you
may correct the liniarity of that meter with a function in AnalogPelorus ?

I did not do that yet.

The meter is a nice cheap help for homming in while driving in a car.

Oh the calibration and CW/CCW and Averaging does stil work and can be adjusted through the
terminal software or MyMapping ofcourse.

So have fun experimenting.

New source code in arduino.txt attachment.


PA3BNX:
Hello Every Body,


Some things from TCI you should see :

TCI youtube demo



https://www.youtube.com/watch?feature=player_detailpage&v=EJlSurZZh44
https://www.youtube.com/watch?feature=player_detailpage&v=elOZo3I-W6o
HF RDF
https://www.youtube.com/watch?feature=player_detailpage&v=H8UXhyHgpm0

Wow hi..
PA3BNX:
Hello Every Body,

Now working on a LM3914 10x led homming in Pelorus for the arduino doppler.

The lm3914 doesn't show  a burning led if the input voltage is 0 Volts.

So I have to fiddle a bit with offset in the AnalogPelorus Function in the

Arduino Source.

Circuit draws about 10mA at 5V so can be fed from the USB






PA3BNX:
Hello Every Body.


I did n't think of the fact that an arduino PWM pin does give two voltage levels instead of a DC signal.
(about 500 Hz switching)

So the lm3914 Pelorus lit just two leds hi ...

The fix was replace the input level potmeter with one of 47k and acros the wiper and mass a elco of 1uF

Now it works okay hi

Also changed a little bit the Arduino source

All Pelorus leds are of if squelched.


Now it also has a test mode press T in terminal so first and last led light for 5 seconds.

You can have the doppler rotation frequency simultaniously
if you mount 2 diodes on oin2 and 3 to the lowpass input circuit.

See new arduino shield circuit drawing.


To nice youtubes with dopplers:

Doppler autotrack quadcopter
https://www.youtube.com/watch?feature=player_detailpage&v=SqWVdhSeA6A
TSCM DDF2020T





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