HB100 radar!

[jgu1]

Hi Martin!

Yes I could imagine it was hard work. I am not home before tomorrow evening, driving around in the country as service techincan. As soon I am in my hobbyroom tomorrow I will peform a test

Thank you for your job and for your explanation. I look forward to test. And you hear.

Edit. Meanwhile in the hotel I try to analyze your program. Yes changes. I see you use component timer macro, I can´t see it in the panel, is it the this timer, please?

Jorgen.

[medelec35]

Doh!
Sorry, here is a corrected flowchart.
You should be able to see the timer component on it now?

[jgu1]

Hi Martin!

Yes, again wow Martin now it is working, and the correct speed, much more stable But there is long time between update in the display.
Can I do something to speed this up or has it something to do with calculating the average,? But anyway it work so nice.

As mentoid I order a PCB from the seed with the other amplifier and I will test this also, to see if I can measure from longer distance.

Thank´s a lot and many times, be appreciated Martin

[medelec35]

Hi, Jorgen.
I'm glad it's working better.
I looked at the Ardunio version you linked and that was a bubble sort, rather than an average.
I believe my version will be better, but it's worth comparing?

Can I do something to speed this up or has it something to do with calculating the average,?

My version does not calculate the average, it compares and rejects differences.
Yes, there are three things you can do.
1. Reduce the 50ms delay to say 15ms
2. Reduce

Code: Select all

(Frequency - PreviousFrequency) < 20 || (PreviousFrequency - Frequency) < 20

to a lower matched value like 10. But you will also need to reduce

Code: Select all

SimularValue > 20

to the value e.g 10
3) Remove the

Code: Select all

If: SimularValue > 0

branch

[jgu1]

Alone the delay from 50 to 15 mS help a lot, so this is very fine. Tomorrow I will test when a car drives past my house house.

Jorgen

[medelec35]

That sounds a great idea!.
Can you let me know the results please.

[jgu1]

Hi Martin!

Yes it work nice. I have made some test with a car, bycycle and running. I discover that the HB100 also can detect from behind, you kow there is a front
where the antennas is placing, tranmitting and receiver. So this also have an influence, I had to sit still I don´t know why, but when I measure I have to be exactly in front of the car before I can get signal. I will made a housing, aluminiun just like a horn so it becomes more directional. and be able to so I have the opportunity to stand on the sidewalk and test cars on higheer speed.
But my test by car with analog speedometer:

10 km/h HB100 = 8,9Km/h > 20 km/h HB100 = 22 km/h > 40km/h HB100 = 38 km/h Again compared with an analog speedometer.
When I walk in direktion a wall I see approx. 1,5 - 2,3 km/h Of cource sometime a couble of km/h + and minus.

Conclution: it work Martin and I am sure your program is precice. (as always I will play and have fun with it. Again Martin thank you and my offer I send you in pm is still active .

Br Jorgen

[medelec35]

Hi, Jorgen.
Thank you for the results, and you are welcome.
As analogue speedometers show a higher speed than actual speed, the results look very promising indeed.
I'm really tempted to make my own radar detector!
There are several schematic variations going around.
Which is the schematic that works for you, if you have a link to it?

[jgu1]

Hi again!

I use the amplifier with the LM324 from the project here: https://stoppi-homemade-physics.de/dopplerradar/ I add a capasitor, resistor and a gate on the output and then into B0 on the Pic because the ouput from LM324 is not zero. I made a handdrawn sheet The same guy also made an another amplifier with a LMC6482 I have not testet.

Another project: https://www.youtube.com/watch?app=desktop&v=uSma0zQSnsU and his project is here;

and all info: https://www.dropbox.com/s/7d1fdzr8d243n ... 2.zip?dl=0


I have orderd PCB from here: https://www.seeedstudio.com/CDM324-amplifier-g-1243199 Only to test his amplifier too, little different.

Hope this help a little

Br Jorgen

[medelec35]

Hi Jorgen,
That's useful information, thanks for posting it.
I sent you a PM on Tue Oct 19, but it's still showing in my outbox.
Can you please let me know if you have received it or not?