Can pinpointer detecting thin chain?

[Davor]

Not necessarily. Integration can be asymmetric, and also time dependent, so it can maintain optimum sensitivity.
Once the stability is reached, integration can be slowed down by factor, say 100, and in effect no sensitivity is lost, and long term stability is maintained.
It would make a design more complex though.

[Nupi]

I am sure autotuning will be invented soon. We just need to wait until someone gets bored with those regulating facilities.

I hope it. But I think it will be very difficult when the sensitivity should be maintained.

[Waikiki_Sweep]

I mean when you turn on for the first time, after 15 seconds it so stable
that you only every 2-3 minutes must regulate a little.

I am sure autotuning will be invented soon. We just need to wait until someone gets bored with those regulating facilities.

[Nupi]

Pinpointer stability.
https://www.youtube.com/watch?v=JnGYvs2gHvQ

Congratulations, hadrianus.
You have done an excellent job.
and a good and clear video.
You are the very first that post the Nupi DIY project.

GREAD

[hadrianus]

Pinpointer stability.

https://www.youtube.com/watch?v=JnGYvs2gHvQ

[Nupi]

Hi,I'm not sure what you mean but I'll explain something.
It's not a "on and go" pinpointer.
But I have built a lot of them with a good stability.
I mean when you turn on for the first time, after 15 seconds it so stable
that you only every 2-3 minutes must regulate a little.

[hadrianus]

Hi! Why it is, that it is necessary to claim it then because he crawls away always the set value? So not stable.

[Nupi]

Nem, de Google tudja.
Üdvözlettel

[hadrianus]

He will be tested in the days. The results, and I will announce the modification.
Nupi, you can in Hungarian?! "Üdvözlettel"

[Nupi]

Have you already made the pinpointer on your pcb and tried out?

Are you satisfied with the result.?


Find your worth to build the pinpointer?

What would you add to or change on the pinpointer?
Sorry for many questions, but I am today in questions mood

Üdvözlettel

[hadrianus]

Thanks!

sot-32= BD237
TR1= BC560
Coil: 10x100mm ferrit, L1: 0,23mm 100 windings, L2: 0,5mm 70 windings

[Nupi]

Hi! My PCB.

[ATTACH]29206[/ATTACH]

It looks very good.
What do you use for transistor TR1?
On the PCB I see an image of a sot-32.


Can you tell what kind of coil you use?

[hadrianus]

Hi! My PCB.

[Nupi]

I do not think it will make any difference. Last winter I have kicked 6 ft. reef shark with my coil once it go in my direction.
I am sure any one else will jump out from his pants in such situation.
I am regretting I did not care GoPro to save such moments.
Interesting that sharks have very sensitive electric sensors below nose. How it has survived contact with PI detector which sending high voltage flyback impulses?

One time it happened to me . I'm in the North Sea with my High End DY gold detector
to search and then went all the green LEDs on of my display. I know it, this is 100% gold, and
not a little bit but really large pieces. I thought, boy, this is your lucky day.
But when I saw it, and stood face to face against each other ......................I jump out of my pants and I said
M...F...S...
I never went in the water again.

[Waikiki_Sweep]

I have an idea, you have to listen at the music from Shark Night - Dark Tide - Jaws..........
I think you run the water out. with your hair standing on, and you never come back

I do not think it will make any difference. Last winter I have kicked 6 ft. reef shark with my coil once it go in my direction.
I am sure any one else will jump out from his pants in such situation.
I am regretting I did not care GoPro to save such moments.
Interesting that sharks have very sensitive electric sensors below nose. How it has survived contact with PI detector which sending high voltage flyback impulses?