Can pinpointer detecting thin chain?

[WM6]

long away nothing hearing about FALCON MD20 project..

Probably it should be called FAILCON.

[Qiaozhi]

long away nothing hearing about FALCON MD20 project... is there a progress, Carl, George, Gary?

Are we supposed to be working on a "Falcon MD20 Project"?
If so , this is the first I've heard of it.

[Nupi]

Hi Nupi - good effort - like the techniques in the video.


your 1/2" distance is written as 1 1/2 could be misleading for some.


What design is that? S

hello golf nut.
At this moment I can not give you a schematic because
I might want to make a DIY project, but I'm not sure.
I can tell you that the circuit does not contain crystal and no pic.
It has 2 transistors 1 ic and a voltage regulator and 6 resistance and 5 capacitors,
1 diode and a coil. Thats all. It is simple and efective.

[6666]

When are you going to make the DIY project ?

[Nupi]

When are you going to make the DIY project ?

Hi 6666
I really can not say. It all depends on my health.

[Waikiki_Sweep]

hello golf nut.
At this moment I can not give you a schematic because
I might want to make a DIY project, but I'm not sure.
I can tell you that the circuit does not contain crystal and no pic.
It has 2 transistors 1 ic and a voltage regulator and 6 resistance and 5 capacitors,
1 diode and a coil. Thats all. It is simple and efective.

Coil is good. I bet that coil design gives most of advantages for this device.

Small core and short coil concentrating magnrtic field at the end as well as sensitivity instead of usual pinpointers with long core and long coil.

Am I right?

[6666]

Hi 6666
I really can not say. It all depends on my health.

Thanks Nupi, get well soon .

[Nupi]

Thanks Nupi, get well soon .

6666 Thank you very kind of you

[Nupi]

Coil is good. I bet that coil design gives most of advantages for this device.

Small core and short coil concentrating magnrtic field at the end as well as sensitivity instead of usual pinpointers with long core and long coil.

Am I right?

I have to disappoint you.



You says a small core .................Nupi says no.

The coil is special, but it is not the advantages of this device.


The coil is special because it can detect very
small parts with the dimensions that it has.
2.5 by 3.5 centimeters.




Theoretically,is this very difficult, but in practice possible.

The advantages of this device is determined by many factors.


The oscillator is very important. He is actually very similar to the oscillator
which is described in the very interesting book
-Inside the METAL DETECTOR-

[Waikiki_Sweep]

Wow. Where did you get such a big diameter core? Did you wind coil over ferrite caps?

[Nupi]

Wow. Where did you get such a big diameter core? Did you wind coil over ferrite caps?

The coil is made with 3 ferrite core.
But with one ferrite core is only 10% less depth.

I have the circuit built in several versions. He does on a real breadboard very good.
The detection depth is the same as on the video.

But the best result I have with a circuit in the air. Without board 20% more depth.

And when you any second 2 detecting chirps accept, then
detects the pinpointer 30% more depth than on the video.


So, then detects the pinpointer a 50 eurocents to 14 cm without becoming unstable.
That's why I said it can be even more Improved.

- QUESTION -
Do you know someone who has a lot of knowledge of microprocessors?

[chemelec]

I have to disappoint you.

[ATTACH]28835[/ATTACH]

You says a small core .................Nupi says no.

The coil is special, but it is not the advantages of this device.


The coil is special because it can detect very
small parts with the dimensions that it has.
2.5 by 3.5 centimeters.

[ATTACH]28836[/ATTACH]
[ATTACH]28837[/ATTACH]

Theoretically,is this very difficult, but in practice possible.

The advantages of this device is determined by many factors.


The oscillator is very important. He is actually very similar to the oscillator
which is described in the very interesting book
-Inside the METAL DETECTOR-

With such a Large Diameter Core, It doesn't really "PIN-POINT".
But it does give better Distance of detection.

[Waikiki_Sweep]

With such a Large Diameter Core, It doesn't really "PIN-POINT".
But it does give better Distance of detection.

Yes. With bigger diameter coil it works more likely as metal detector instead of pinpointer.

But it is much easier to pinpoint with 3 cm. pinpointer coil than with 30 cm. metal detector coil anyway.

Also it has good dept with bigger coil and instead of metal detector it caching small gold.

That idea to build pinpointer with shorter and bigger diameter core works very well! Magnetic field goes much dipper with such shape of coil than with regular pinpointers.

Interesting, maybe with disk shape of core and even bigger diameter of coil it will let to create a metal detector that can find small chains finally.

[Nupi]

With such a Large Diameter Core, It doesn't really "PIN-POINT".
But it does give better Distance of detection.

First of all, thanks for your comment.


I think, it depends on what for detection standard you take for a pinpointer.


In the video you can see, for example: link number 2 and 3 for me is this
a pinpointer detection.


But how good is a pinpointer that is sensitive on 1 square centimeter,
but can not detect the target?

[Nupi]

........But it is much easier to pinpoint with 3 cm. pinpointer coil than with 30 cm. metal detector coil anyway.......

That is true, but the special thing about this coil from 2.5 centimeters is that still detect very small particles.

A one and the same coil that can detect 1 euro on 12 centimeters and a link of 0.07 grams of gold on 0.5 centimeters is very special.

Many ingenieurs will attest.