felezjoo PI(the best pulse induction metal detector that I made until now)

[sabios]

I'm doing some tests with the Felezjoo, but it's a version I've adjusted and I call it DW. I've also changed how it discriminates; now it can reject metals like lead, aluminum, pewter, soda bottle caps, and others, which go into the FERRO category, while copper goes into the NON-FERRO category. In theory, copper, gold, and silver should also go into the NON-FERRO category, but at the moment I don't have any high-quality silver or gold to test with, only copper.

What I did notice is that with the changes, it's able to shift the discrimination backward or forward. For example, if I move it, the aluminum can might go into NON-FERRO, but if you adjust the settings a bit, it might go into FERROUS. And that way, I can only search for valuable objects, like copper, gold, and silver. But for silver and gold, I still have to test it, but for that, I have to get them, and right now I don't have them. I can get silver, but I don't think I can get gold.

[sabios]

According to the tests I've run, its discrimination is based on conductivity. It's not precise, but it's capable of removing impurities and leaving precious metals like copper, gold, and silver. However, it can't differentiate between them; the discrimination only goes that far.

And in fact, while testing, the 7805 burned out, and I don't know what else happened, but it doesn't matter. I just have to fix it and continue testing. What I've noticed is that using it like this reduces the depth and stability a bit, but it's just a matter of finding the optimal configuration. As soon as I can fix it or build another one, I'll upload videos to document it.

But I want to clarify that this is a version I'm working on, and as I said, I'm calling it DW. It's still in testing, but it's progressing well.

[sabios]

This is the first test to demonstrate some of the discrimination capabilities of this detector.

By the way, this is a PI Metal Detector with the ability to discriminate metals by conductivity. It can be used to search only for more conductive metals like copper, gold, and silver. It's still in the testing phase, but for now, it's able to reject metals like aluminum, iron profiles, nails, rods, pewter, and other metals, which are marked as FERRO. Copper, gold, and silver are marked as NON-FERRO on the screen, making identification much easier.

I should mention that this is a modification I made to the Felezjoo, which is why I'm calling it DW, to make it even better than it already is.

youtube.com/watch?v=Y6s9TrW458I&feature=youtu.be

[ivconic]

The box is legendary, well done!

Ah, it just happened that way.
For the first time since 2018 (since I have 3D printers) I switched from PLA to PETG and right at the start I had huge problems with the settings in Cura.
I think I'll go back to PLA when I use up this roll of PETG.
The final box looks good, but it needed some extra work after printing.
There was a lot of "stringing" in the print and I can't seem to adjust the parameters to get rid of that problem.
I'm going back to PLA at the first opportunity!

[Ivan2011bc]

Fpi made by Mr Hamid in Iran ?

[ivconic]

Fpi made by Mr Hamid in Iran ?

Yes.

[sabios]

I have a question for the friends who finished Felezjoo and that is what is your opinion of the discrimination in the team, for example, is it capable of rejecting tuna cans and aluminum cans, pewter pots, iron and others and leaving the copper pipe in NO-FERRO and the silver.

[gurdal]

I made 4/5 Felezjoo Pi units and tested them.
The device performed superbly in air tests.
It might be because I haven't mastered the device.
I couldn't resolve the ghost signal issue during ground tests.
It could be due to a counterfeit part.
There may also be factors such as coil winding values.
The device is excellent when it comes to discrimination.
It produces a distinct sound for each type of metal, particularly with tone 11/12.
Thanks to the project creator for sharing such a great circuit with us using just a few components.

[gurdal]

My colleague ivconic is more experienced in this matter; he can provide better information if he wishes.

[sabios]

What he said is that in discrimination tests, the screen is capable of discriminating between different metals. For example, I use tone 7 and perform the discrimination test on the screen, since it's very capable of marking metals like pewter, iron, wire rod, cans, and others as FERRO, and leaving copper as NON-FERRO, along with silver and gold. I don't know about gold because I don't have anything to test it with.
Regarding the false signals, that's due to a bug in the program that I've already fixed. What I want to know is if the online version is capable of the discrimination he mentioned.