I've been here so far. I wish you health! ...

Hey, are the IVConic placement files ready?
how long will it take to be ready...

Yes, of course.
But I remembered Gary for some other works, to be honest; I totally forgot about the one you're working on now...or maybe I've never even seen that project.
Although I have been on the forum for a long time; I never followed all the topics, and it was even harder to remember...

I've wasted a lot of time making detectors as a hobby and I haven't gotten rich from it. It's a good thing I've always been at a high level in industrial electronics.

Hello again, could you please give me some information about how to wind the coil and its dimensions? Am I going to make two coils?

I made this detector 30 years ago. I have not seen anyone make a detector that actually works at a greater depth. And it turned out that there is almost nothing there. All interesting finds are at a depth of up to 40 centimeters. Valuables are hidden when there is a sudden danger. Then a person does...

Thanks Ruben2000. Yesterday I etched the board according to the photo, I will have to follow it carefully. I made the correction for the diode that Sasho wrote, the rest will be exactly according to the diagram. I have ordered the transistors that are on the diagram and some other parts when they arrive,...

The circuit board always indicated that this was Gary’s “Twin Coil PI.” And I have never claimed otherwise. I merely used his latest schematic and modified the method—using a 5-pin socket—by which the various coil types are connected. However, the detector electronics remain true to Gary’s...

Hello everyone, I'm working on a repair for a Detech SSP-3100G FD. The microcontroller (PIC16F876A) shows a leakage (220 Ohm between VDD and VSS) and is overheating. I have already replaced the CMOS multiplexer (CD4051) and some other analog components, but I need the original firmware (.HEX) to program...

Don’t think I have no idea who you are! Don’t bring shame on yourself!...

Everything is here:

https://www.geotech1.com/cgi-bin/pag...head/index.dat

Are you an idiot?

Correct your problem first
How @ can you say that there is no physical manufacturer!
Manufacturer's geographical location coordinates

latitude：42.111164
longitude：122.258619

Test videos and equipment pictures are displayed...

please I need gerber file of Hammerhead

Chemelec!
If only you had said that right away!
Gary was a good friend!
He did a lot of things in his own interesting way.

​...

Page 4, post #60......

Yup, the way I felt writing ITMD3.

As time goes by... I find myself more like this:

​...

How can a manufacturer without an address be considered reliable?...

I should make this my avatar

​...

Do you have the PCB for this circuit? Can you provide it? If so, please.

​...

Nice to meet you, father Sasho.

My name is Nikolay from Levski station.
Life and health in winter we will continue with the projects.

Of course I'd like to share, as I'm waiting to hear what my engineer friends are thinking.

"...Page 1, post #1 is the most proper schematic..."

This schematic, and author is SCS-BG who posted it.
Read what he wrote and try to understand.
So, disregard that shematic and pay attention to this schematic, I clearly answered you again with this: "...Page...

I couldn't understand exactly what the parts I've circled here do, and whether SMDs are used in the circuit. Is it possible to use pinned components instead of SMDs? I would appreciate it if you could answer my question.

haylaz güzel bir devre bulabilirsen benimlede paylaşır mısın...

Hi Ivconic,

there is under "Completed Projects" section a specific topic regarding Gary's Twin Coil PI....

I want to see your detector tossed over the antenna. How do you fly over the antenna? It's spam for you when it doesn't work for you....

It seems interesting. Is there a topic on the forum dedicated to that detector?

Hi Ivconic,

The Gary's Twin Coil PI Rev 1.0 version features the same circuitry as the original (based on the latest Revised Pulse-1 and Pulse-2 schematics from April 2009), with the exception that I designed the PCB (134x68mm) to fit a readily available, standard-sized enclosure (160x80x55mm)....

It is on the schematic, can't you see?

​...

How exactly do you make the coil? Wire thickness, coil winding pattern, number of turns, etc.?

Page 1, post #1 is the most proper schematic.
The pcb is yet to come, not finished yet....

Hello, I'm writing from Turkey. Can you please provide me with a detector circuit diagram for me to build, and could you give me some information about the coil configuration?

GeoMax, kidding aside.
Your pcbs are neat.
No complaints.
I'm really lazy (to take photos) and hate digging through boxes, I have about 100-200 different pcbs that are surplus, JLPCB has a limit of minimum 5 pcbs to order.
And I often only need one, that's why I have so many...

Yes, thanks for the heads-up. I should pay closer attention to that. "Frequenz" is German, and "frequency" is English....

Maybe he's a naturalized German?
We shouldn't complain about that.
It is equally good if it says "Energy of ether".
The main problem I see is that there are no components on the pcbs, a terrible omission!
Pure rookie mistake!




...

you have to use the word "Frequency" , entweder English ,oder Deutsch .....

​...

If someone had given me a Barracuda or a Surfmaster back in 1986, regardless of the fact that they don't have GB or Disc; I would get rich with the findings.
Neither Manticore nor Deus 2 mean anything to me these days.
Sasho noted the reasons.
What about you guys?
Except for...

In resonance. It also determines the phase of the ground. The transmitting coil must be able to be tilted and fixed. Before starting work, a minimum of the received signal is established by rotating the transmitting coil and it is fixed in this position. This is shown in the general view with small...

Hi pechkata,
What is the connection between the content of my post #70 and your post with presentation of "Deep Force" hybrid detector? Yes, this detector is very good and modern. Maybe you want to support my words that metal detectors without EFE, GB and DISCRIMINATION features not...

Amen to that!
I keep switching the detectors, brands, models... no help, nothing to find with a detector anymore.
I keep lying to myself:
"The findings are a bit deeper, I need a slightly better detector..." or "the findings are masked fiercely, I need a more selective...

Here are some pictures of the PCB!...

Perhaps that's the problem; I might be asking too much, but how can I tell if both coils are in resonance?
If I remember correctly, I calculated the inductance of L2 using C6 and C7 to match the frequency of L1, and I put the oscilloscope probe on pin 7 of the TL082 to balance the coils and made...

Hello Ivconic,

I am now giving you the opportunity to review some of my PCBs. If you think anything could be improved, please let me know. I value your opinion highly.​





Sure!
They miss components!

...

...

I don't know if it's the deepest, but it's really an excellent detector because it has a ground balance and works at a relatively low frequency. The only adjustment is the resonance of the coils. It has high sensitivity, but it works stably. If worn low above the ground, it reacts to metal eyelets on...

Thank you, Sasho, I'll have to get to drawing the circuit board and assembling it someday.

[Q UOTE=ivconic;n448460]

"...however, I—as a customer..."

You and anyone else will never become a "customer"; for the simple reason that I will not offer these pcbs for sale.
I will only make 1 single detector for my personal use and fun.​
Though,...

I built it once, but I wasn't successful!
On a forum, they mentioned that it's the most powerful detector in the world if you make a few component changes. I was very interested, but I didn't have the necessary experience to figure out what the problem was.
Since we're here with...

Nobody got rich from making detectors. Me neither. The big manufacturers are the exception. It's a dying hobby. The problem is that there's nothing to find with a detector anymore. Even on the beach, people don't lose coins anymore because they don't carry money, but cards......

The stabilizer can be replaced with LM 2930-8...

This is the detector with the greatest depth for medium and large objects. There is a small error in the circuit - D 3 is connected backwards. The coils can also be made with 0.25 wire. I did it a long time ago but I remember it worked great. The problem is who will dig...

I think this forum is a place for smart and educated people. I have also been insulted here by people with complexes. This was the reason I did not participate for several years. This forum is for helping each other without conflicts.

Playing with AI cartoons brings me more fun than detectors!
I'm afraid the AI ​​has taken my soul!

​

Hi ivconic and scs-bg,
You are right! "Waving coins in front of the coil" is most wide popular useless presentation of the capabilities of the MD. See presentations of "Pirate" MD with only two integral circuits. With static coil and some settings this detector is capable to...

​...

​...

Based on some of the comments and "criticisms", I am sometimes genuinely surprised with the ignorance of most people on this forum!?
With metal detectors as with most electronics; the worst enemy of performance is a poor S/N ratio.
When trying to design a good pcb; the correct...

These comments clearly show someone who truly understands the issue of metal detectors.
That's why I follow everything Sasho rarely publishes, because it's mostly interesting stuff.
For years, I've been making fun of the unprecedented YouTube "successes" of various characters....

"...however, I—as a customer..."

You and anyone else will never become a "customer"; for the simple reason that I will not offer these pcbs for sale.
I will only make 1 single detector for my personal use and fun.​
Though, many objections are "fine"...

I don't do the sport of "Waving coins in front of a coil". I don't participate in this circus for the naive. I can make a video in which a detector detects a coin in the air at 40 centimeters. In real use, it will never detect it. A lot depends on the soil. There are cases when an expensive...

Hi, Sasho, have you done a test in the ground and how deep will it detect? Any examples with coins? Thanks.

Hello Sasho, I would like to ask, have you tested this scheme in the field, what is the depth? ...

Hello Sasho, I would like to ask, have you tested this scheme in the field, what is the depth?...

Hello ivconic,

At first glance, the PCB makes a good impression. On closer inspection, however, I—as a customer—would not be at all satisfied with it. Why? Just take a look at the component layout. The silkscreen looks terrible. The component designators are oriented sometimes to the...

In the meantime, I will prepare the "placement" file.
I am the main culprit for the inconsistencies in the numbering of the components... so it is my "punishment" to prepare that file for you.
Give me a day or two...

​

Ok, testing (to the best of my "senile" power) is complete and I found no errors.
With the permission of my colleague from China (who is present on the forum but is too modest to expose himself),
here I am sharing the gerber files for making a pcb.
Of course, more of us together...

Of course... just kidding!
Not everything should be taken so seriously!
When the pcb is tested and passes all verifications, if Sasho allows; i will post all the files...

​

Here's what Sasho's slow motion prototype pcb looks like, it's a pcb I'll never make public, Sasho himself is entitled to one or two.
It is currently in the process of verification and testing.
The rest of the forum can now thank you warmly because they will never get a layout of this p...

If you mean my own pcb drawings... yes, some are drawn too fast and made lot of mistakes. But "most" is overstatement.
Sometimes it does not work because there is not enough knowledge to make it work?
I make my living from this. Would I make a survival if "most" is...

Most of your boards don't work. ...

If there weren't engineers like you, who would lead the way? I'm sure that if engineers like you came together, a great project would emerge....

I wanted to brag that I use your scheme.
It works one to one air to ground.

...

Hello GeoMax
Yes broadcasting from AF108 - analog small board.
The big board is this circuit.
...

A coil is easy to make. See how I make mine. Bandage, a wooden profile and epoxy resin. You apply the resin with a brush. It turns out very light and strong. In the picture you see a coil for PI. But I don't want to do anything anymore......

More information:...

I won't try that.
I'll wind the coil this time.
Now I feel like killing myself!
A few months ago I sold a brand new Cscope that had the ideal coil for this detector!
​

It's about C3 in the generator circuit​...

I tried a coplanar coil with a diameter of 250 mm and 60 turns in the transmitter. The capacitor C1 had to be increased to 1 microfarad. It works very well. If you want to use Fischer coils, you need to replace the generator with the one from "Whites Classic 3". In my scheme, the generator...

For the last couple of years, my place Sokobanja (formerly known as a spa in Europe) has been a favorite place for Bulgarian tourists.
Now there is no longer a border between "season" and "off season", now every weekend is "season" for tourists.
And the real...

Yes, you are right!
"Old school"!
Many inexperienced colleagues will not understand.
The better Cscope models will be... to put it mildly "miserable" on bench and air tests, but they will always find amazing results in real soil.
I had a couple of models but...

The PCB request was a joke. I'd be happy if you were happy with the result.​...

Ah yes!
In the meantime, you indirectly answered my question.
Just by mentioning "CScope" you explained things to me!

​

And now one question! Ha, ha, ha!
I stopped DIY coils a long time ago!
I think I stopped when I was doing IGSL (the successor to TGSL).
Since then, I rarely build detectors, mostly for my own needs and as a hobby.
And instead of making coils; I always look to use an original...

Almost all ground balance detectors operate with a phase-shifted ground balance signal. The second channel determines the type. The detector emits a signal when the two signals match. But the constantly changing signal in both channels leads to errors. That is why a perfectly working detector in the...

When a colleague from China draws a pcb; will send me the gerber files.
Then I will order the manufacture of 5 pieces (minimum is 5) in JLPCB.
When they arrive; I can send you one or two.
This is not a problem, it is important that the detector works well.
​

I repair lasers and robots and I have no problem making a digital detector. I think analog detectors work better. I hope you are satisfied. I hope you can send me some Chinese boards for free. I am a poor man with only one pension...​...

Back to the topic.
Sasho, I gave your schematic to my younger (and much smarter) colleague from China and asked him to draw me a pcb according to the given dimensions.
Until I met him a couple of years ago; I thought I was a very fast and good pcbs designer.
But then I saw that he...

Every amateur work is worthy of respect.
But I think someone mixed up the topics here.
We are talking about Sasho's VLF-I/B slow motion here.
PI detectors should not be confused with this thread.
Although I'm tempted to say that my Barracuda does a lot better than that PI in...

"The great Bulgarian inventors" are characterized by measuring whose organs are larger. I don't want to deal with that. Even in the air, this thing has no depth.​...

Hello Pechkata,

Is the detector board in the video you posted based on the Whites AF108 mine detector?​ Or what circuit is the base?

Excellent Pechkata, that encourages me to build it. I'll have to make time for the PCB. Did you have any problems building it?

Hi GeoMax!
thank you.
These pictures of the DD coils are very interesting.
I need to use a stepper motor and adjust its steps to a low speed to avoid tearing the copper wire.​...

Hi Nogtail,
Falkon MD20 is "Energy theft" type, not VLF type. Nevertheless, try to use this scheme for your purpose....

Hi Nogtail,
Try to find the scheme of Falcon MD8 or MD20 pin-pointers on geotech1.com site. They are VLF type and the working frequency of these pin-pointers is 300KHz. These pin-pointers are advertised as capable to find very little metal particles ( almost invisible). It is good that your task...