data logger .

[ramzzi]

I'm looking for a schematic for building a data logger or any information regarding a data logger that can be integrated via the headphone jack of the Gold Mask Pro 7. I would be grateful for any help, thank you.

[Carl-NC]

Take a look at the data logger published in the August & September, 1999 issues of Everyday Practical Electronics. See WorldRadioHistory.com for back issues.

[Eddy71]

https://www.aliexpress.com/item/1005001351679089.html serial logger

[ivconic]

Is the Gold Mask Pro 7 a PI detector?
Some insinuate that it is an improved version of the Pulse Star 2 detector, I cannot say that, I have never had the opportunity to see that detector or test it.
In 2021 I made some similar logger for Delta Pulse type PI detectors, Pulse Star 2 and similar PI detectors that have VCO type audio output.
My idea was to monitor the frequency of the audio output.
I measured the frequency and transitions in this case with the processor.
The logger part is less important, it can be done in many ways. It is much more important that you define for yourself what you want to log from such an audio output.
How to extract a useful part of information from such an audio output?
In the mentioned cases, I made a very simple solution that gave solid results:

[ramzzi]

Yes, my friend, the Ivconic device is a good one, made in Bulgaria with pulse induction technology. It has good and excellent depth and is equipped with a VCO output. Look for a digital-to-analog converter that can be integrated with a headphone audio output to obtain high-resolution 3D image data and images, especially for spaces, using available applications or software. Thank you, sir.

[ivconic]

Yes, my friend, the Ivconic device is a good one, made in Bulgaria with pulse induction technology. It has good and excellent depth and is equipped with a VCO output. Look for a digital-to-analog converter that can be integrated with a headphone audio output to obtain high-resolution 3D image data and images, especially for spaces, using available applications or software. Thank you, sir.

Is this a conspiracy or a joke?
On another topic, I became the owner of the "PD3200" PI detector, and here I am also connected to some device "from Bulgaria" that I have no idea about??
Can you give more details about it?

[ramzzi]

The device I own is a Golden Mask Deep Hunter Pro 7 SE pulse induction device. I'm looking for a digital data recorder and converter that can be integrated via the headphone jack to obtain 3D data images. That's what I'm talking about, and I have nothing to do with what you said—no conspiracy or joke. Thank you again, with all due respect.

[ivconic]

The way you wrote the sentence implied that I had something to do with that detector.
Never mind, that's off topic.
...
"...The device I own is a Golden Mask Deep Hunter Pro 7 SE pulse induction device..."
Ok, it's clearer to me now.
You have that detector and you want to take some signal from the headphones output and based on that signal you get "3D data images"?
How did you imagine that?
The "signal" that exists at the headphone output is an ordinary audio signal, which does not carry enough "information" from which "3D data images" could be obtained later.

[ivconic]

I assume it's this detector you have?
It is clear that it has a very simple audio VCO type.
There is no "information" there.
Especially not for "3D data images"?

[ramzzi]

Yes, brother, this is the device I own. But what I'm looking for, I've seen before and personally tried; it's similar to a small, commercially made device called Icon Data.

[ivconic]

Clearly.
I know about it.
I made something of my own that does the same thing.
But it does not provide any essential benefits to the detectorist.
You cannot extract "3D" information from an audio signal.
The audio signal from such PI detectors has only frequency and amplitude.
Changing the frequency of the sound is "one dimension" and the amplitude is "another dimension".
There is no third dimension.
Mapping the soil in this way does not bring you anything more than just playing with additional toys.
And it's completely imprecise, given the shape of the "sensor", in this case the coil on the detector.
I am not an advocate against such devices, I just want to present you with the real facts in advance.
A magnetometer is something else entirely. Soil mapping with a magnetometer is crucial.
And soil mapping with a PI detector is an unnecessary complication and a waste of time, with no ultimate benefit.
Eddy71 in post #3 gave you a very cheap and affordable logger. All you need is an "audio buffer stage" to add to it.
In post #4, I gave you a way to "measure the frequency" of such an audio output.
A very rudimentary way, easy and cheap.
Of course, things can be done much better.
But the final motive is weak, effectively there is no use for it.
So how do you get the third dimension?
Simple and useless!
The frequency change of the audio output is plotted in 2 dimensions and the amplitude change is used to plot the 3rd dimension.
All this would make more sense; if we could measure the depth based on the amplitude (many use that method).
But that method is extremely inaccurate and unreliable.
There is often more harm than good from such an approach.
A differential approach, a gradient approach, is needed for approximately more accurate depth measurement.
Even then, the method is insufficiently accurate.
With a PI detector that uses a single "sensor" (coil), that method is pointless.
I'm quite in the mood for scribemania here as the issue of measuring depth with various methods has now been the focus of my efforts for the past few months.
I research the literature and read "tons" of academic articles on these topics. And that's why I'm so pessimistic.