Can pinpointer detecting thin chain?

[Funfinder]

1. question: Can pinpointer detecting thin chain?

Yes, you need a Garrett-Pro-Pointer with manual screw adjustment modification for edge-sensitivity-adjustment.
Depending on your skills and experience while digging out the stuff and feeling the vibration between slow and slightly faster
you will achieve 100 - 300% higher sensitivity!


2. First finding a small chain with metal-detector:

A detector with small coil is needed that doesn't discriminates already little rusty iron nails etc. by default on its lowest or even all-metal settings.
8-15cm (3-6inches) coils which means you will have to sweep alot on the beach or wherever and the lightweight chain must not buried deeper than 10cm or 4''.

[bernte_one]

hello nupi

looks good
i hope you will offer this layout and datas soon for diy project
detection season has begone already here in germany

where did you buy this ferrit core material
i have the possibility to buy 16mm*200mm core for 10€ per piece
also other diameters
but i have to take at least 10 pieces

regards

[Nupi]

hello nupi

looks good
i hope you will offer this layout and datas soon for diy project
detection season has begone already here in germany

where did you buy this ferrit core material
i have the possibility to buy 16mm*200mm core for 10€ per piece
also other diameters
but i have to take at least 10 pieces

regards

Hi Bente,


I can not say when I'll start the project because I want to improve
the temperature stability and some adjustments but before that my health needs to improve.


I have spontaneously responded to this tread but I have doubts whether I should have done.


I have not tried out with a core of 16cm.
I have a good result with 10mm, and it's cheaper.
But it's definitely worth it to give it a try

You need 3 pieces of 3.3cm, so with a core of 10cm you can make the coil.
Cores of MW radio are fine.

You can look at this website. www.friese-electronic.de. Maybe you find them useful.
I have never bought anything from him so far, so I have no experience with him.


I want to try with 3 core of 8mm diameter from Conrad to see what the results are.
They are not expensive and well obtainable.

[bernte_one]

hello nupi,

i am sometimes in contact with mr. friese, you can trust him.

but you say i only need 10mm ferrit rods? thats no problem.
i buy them from ebay from a german seller
http://www.ebay.de/itm/Ferrit-Stab-A...item4857655c4d

you should ask other people here to help you for improvements

i suppose it is not necessary to post whole shematic

but single stages, or if you want to compare components with replacements you can also ask here for pro and contra

hope you understand

kind regards

[Nupi]

[QUOTE=................you should ask other people here to help you for improvements............[/QUOTE]


Hi Bente,


Thanks for the Ebay tip.


I had so far not shown any schematic because I wanted to start a DIY project and
it should be optimized and I can not now.


You're right it season is started and it will take too long before everything is ready.

Therefore, I make an appeal to everyone let's optimize together this pinpointer.


There is in this forum more than enough knowledge to make it a success project.


I have worked for months on it to make a simple but effective pinpointer.


I wanted to make a pinpointer that can make cheap.
So it is for every butjet.
That's my goal.


Anyone can make it.


You do not need to solder necessarily (its work fine on a breadboard)


you do not need a osciloskoop


You do not need to program it.


It is not made with SMD components.


Best datas should I still seek. Coming tomorrow.

[Nupi]

The pinpointer schematic is complete.

The pinpointer schematic is complete.

[6666]

okey, I post today a video of my pointer and this week a video of my MD on which you can see that it is possible with a good MD detect a chain and even a link.

Hi Nupi thanks for the schematic, I have seen the video of your pointer, did you make the video of your MD ?

[Nupi]

Hi Nupi thanks for the schematic, I have seen the video of your pointer, did you make the video of your MD ?

Hi,
No that video I have not made yet.
Instead,I have made the second video of the pointer .
To create a video I depend on my son and he is very busy.
I said I wanted to make the video and I will do it.

I still have old bits of video from the earlier
experiments on discrimination about my MD but that may be better
placed in another thread.

regards

[Harp]

Nupi Hello, can you give a precise specification of the coil (the thickness of the wire, how much turns, connection details (A1, A2, B1, B2), the direction of winding, core thickness, ohm, etc...)?
I did not quite understand the use CD4024, but if it is a function of the VCO, it is much easier to be done with NE555 timer?

[Nupi]

Nupi Hello, can you give a precise specification of the coil (the thickness of the wire, how much turns, connection details (A1, A2, B1, B2), the direction of winding, core thickness, ohm, etc...)?
I did not quite understand the use CD4024, but if it is a function of the VCO, it is much easier to be done with NE555 timer?

Hello Harp.


My English is very poor but in simple words the CD4024 is a counter and a divider not a vco.
The counter count on pin one on the negative transition of each clock pulse and then he divided it.


You may be able to download a datasheet for the CD4024.
Maybe you can find someone that speaks good English and can explain better.


In this design, you better use the CD4024 and not the N555


I make a drawing of the coil today.

[Nupi]

The new Schematic

[Nupi]

Nupi Hello, can you give a precise specification of the coil .................................................. .........

I hope you understand the images.But you can always ask for further explanation.

regards

[bernte_one]

seems to be hard work to build coil

thanks for good pictures

[Nupi]

seems to be hard work to build coil

....

Yes, it is a heavy coil.


You can also make the coil of one piece ferrite rod .


You can the circuit try first on a breadboard, it works fine.


I will post later a picture of the breadboard.

[drlogin]

can you provide PCB layout , CAD Format and coil size for detection depth