Arduino metal detector?

[FoxyLab]

Streak of my find:

Hematite?

[FoxyLab]

Looks like maybe a hematite nodule ...

Very thanks for information!

[godigit1]

Looks like maybe a hematite nodule. Do a color test on a unfinished peice of porcelin like the underside of a toilet tank lid.
If the color is brown or brownish red its more than likley a hematite nodule.
one way to tell a metiorite is the surface will have concave formations where the hematite has protrusions or nodules.

[6666]

Meteorite???

If its a Meteorite, get it professionally assessed it could be worth a lot of money

[FoxyLab]

What do you think it is ?

Meteorite???

[6666]

What do you think it is ?

[FoxyLab]

Here is what I found with the FoxyPI:

Weight: 100-150 grams
Volume: 15 cu. cm
It has magnetic properties.
The surface does not conduct electrical current.

[dbanner]

Interference from LCD TV:

Thats very interesting.

[FoxyLab]

The result of the second garden search with FoxyPI v3.3:

[FoxyLab]

Firmware for testing of FoxyPI v3: https://acdc.foxylab.com/sites/defau...aloginputs.hex
In test mode, the metal detector generates a current pulse with a duration of 150 μs in the search coil after switching on, and then it displays the received signal on the screen. Pressing a button generates a new impulse, etc.

Examples of signals:
1 - without target, 2 - with target:

[FoxyLab]

Interference from LCD TV:

[FoxyLab]

Nice simple PI detector.

The first result of the first garden search with FoxyPI v3.3:

[Funfinder]

Hammerhead - the ingenious solution is:
You must order a used and broken Anfibio from Turkey - for half the price
and after passing the military control, you can make it work again! *laugh*

btw. my vibration circuit (see schematics) might be useful for under water.

[Funfinder]

Hello my friend, I am now working on the Pirate Metal detectorUnderwater

Salam, I am happy for your reply and that you can built a good detector now!
I saw complete series Chameleon with Haifa, now I know Egypt better. *laugh*
Very "hot" country, perhaps homebrew MD will be the best solution for you.
Sending detector by post-parcel from Turkey to correct person might work.

[FoxyLab]

Nice work FoxLab. Nice simple PI detector.

Very thanks!!!

I am guessing this is a software implementation of the op-amp RC integrator found in most PI detector circuits.

Yes, simple integration formula with exponential decay (AC-integrator). But i integrate samples sums for each TX-pulse but not separate samples.