Arduino Nano PI Main Discussion

[Qiaozhi]

I understand everything about the coil. The detection range in this photo ..[ATTACH]56875[/ATTACH]. is this for a 10" coil.?

I suppose this raises the question as to how you define a coil's diameter. To be absolutely precise, the inner diameter of the coil bundle used for those measurements was 23cm (9.06"), and the outer diameter was 25cm (9.84"). As you can readily see, the coil bundle width was 1cm.
The previous stated values for the coil diameter(s) were rounded up / down to the nearest inch.
Hope this makes it clearer.

[Myntmaster]

We do not understand each other. About the inner and outer diameters I understand. Items shown in the photo and the range of their detection. This listing has been tested with which coil?

[Qiaozhi]

We do not understand each other. About the inner and outer diameters I understand. Items shown in the photo and the range of their detection. This listing has been tested with which coil?

It's the one shown in Fig. 4-3 and Fig. 4-4, and was wound with 1.7mm bell wire.

[Myntmaster]

I'm starting to assemble a metal detector Arduino Nano...

[MartinB]

I'm starting to assemble a metal detector Arduino Nano...
[ATTACH]56925[/ATTACH]
[ATTACH]56926[/ATTACH]

I do not recall using an an axe when I built mine.

[Carl-NC]

I do not recall using an an axe when I built mine.

Or the finest aged resistors?

[Myntmaster]

The ax is the most important thing in assembly. Well, I soldered the details to the board. The connectors and the Arduinos themselves have not yet arrived. All parts are checked for compliance with ratings. Estimated time was approximately 1.5 hours...
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[MartinB]

The ax is the most important thing in assembly. Well, I soldered the details to the board. The connectors and the Arduinos themselves have not yet arrived. All parts are checked for compliance with ratings. Estimated time was approximately 1.5 hours...
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[ATTACH]56975[/ATTACH]
[ATTACH]56976[/ATTACH]
[ATTACH]56977[/ATTACH]
[ATTACH]56978[/ATTACH]

Looking good.

[Emersonpaz]

I'm also assembling waiting for the arduino nano to arrive

[ionut_mtb]

this have something to do with integrator caps? I use wima red ones. It can affect efe?

[Emersonpaz]

What are the ideal coil specifications for this project.
And what is the ideal dimension 30 cm?

[Qiaozhi]

What are the ideal coil specifications for this project.
And what is the ideal dimension 30 cm?

See pages 28 and 29 in the book.

[Emersonpaz]

I found this forum link impressed with the detection distance apparently a homemade board using the schematic from the book.
https://metaldetectorhobby.forumfree.it/?t=78460802

[Qiaozhi]

I found this forum link impressed with the detection distance apparently a homemade board using the schematic from the book.
https://metaldetectorhobby.forumfree.it/?t=78460802

gallico58 is a member of Geotech.

[gallico58]

telefonic 2x twisted pair twisted pair rolls between them, makes 3 full trips, then welds the start end to get a resistance of about 250 uH and 1.7 ohms.
the damping resistor in my case is 330 ohms.
elliptical coil size 30 cm x 21 cm
shielding with aluminum foil.
sorry google bad english
nice project Thanks George
Ciao Giovanni