Interesting... and what kind of clone detector electronics does the 6103 board use?

Thank you very much for the answers above.

I still have some questions. Nowadays, ARM has free development tools, so there is no longer a need to use expensive development tools, and programmers are very low cost. That is to say, the cost of development tools for ARM chips is no longer...

algan
Hi Algan, this one isn’t available for sale — it’s made by Chinese hobbyists as a DIY project, and there are no schematics for it.
Still, with a 40cm coil, this machine can detect up to 1.5 meters deep, but its stability isn’t great.
It’s a clone of the 6103 circuit board.​

What is the name of the original detector and where can I buy your board? Are they available on Aliexpress?...

Hello everyone, I'm from China. Currently the mainstream models in China are the 6103 and Golden Mask circuit boards. Their depth and stability are not very good, and they are not resistant to high-voltage power line interference! Could any experienced users help me out with a DIY circuit plan? I would...

I made this modification to the circuit board I'm working on. What do you think?

By the way, I'm still having the same problem, since the detector is picking up the stones, which is annoying.
It might be the cable I'm using, since I couldn't find RG58, so I'm using one from an old...

Some photos of the actual item...

Here are the internal photos of the DIY machine I just bought from someone. It's a clone of the Chinese 6103 board....

No, and to get more depth requires (literally) an exponential increase in power. You will need a car battery and a 50-amp transmit current just to get a modest improvement. It's a limitation in physics.

Teacher Carl-NC, do you have a more powerful machine now? If you do, could you show me?

That's about the limit of induction-based metal detectors, including PI....

I'd like to thank all the teachers for your replies. I'm a complete beginner and don't know how to reply to each forum post individually, so I'm responding to everyone here at once. The coil I used is 2m × 2m, with a total wire length of 8 meters. It can detect a car at about 4 meters, and a dinner...

I think you have some misconceptions about the detector you want (great depth for silver & gold). The search depth depends primarily on the size of your search coil. Large coil, great search depth; small coil, shallow search depth. You should also know that large coils can detect large objects,...

For something the size of an automobile, it might be possible. But not for anything smaller....

Oh man!,

I am stucking too much. It takes me some time to find an elegant description and implementation solution. Then it requires a lot of changes. I am not complaining. This is a normal evolution process. So the coding goes on.

Hello everyone,

This is an internal photo of my pulse induction metal detector. I bought it from a domestic seller, but its detection depth is insufficient. It false alarms frequently when the ground is wet or in cold weather. It is also too sensitive to iron, while its response to gold,...

Great idea on the adapter board - thx.
​​

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I agree - a Hitachi display with (added) ambient sensing backlight (that could be turned off) would certainly work and fit right in with the MXT. Lots of options to choose from, TBD...

Hello 55323352, what is your PI detector circuit diagram. Could you also share pictures of the PCB and your coil design. I ask to reference to know how can we help you. But straight away method for you is to buy Inside the Metal Detector book from Amazon

Inside the Metal Detector Paperback...

What is the detector model in the picture? Do you have further information about your detector? Maybe some pictures of the controlls and how it looks from inside would be usefull? What kind of targets types and sizes do you want to find at 3 to 5 meter?...

​
Commercially, most detectors are designed with ARM processors, including some PI. But PIC and Atmel have a much longer history with hobbyists, especially since their tools were free. For a long time, tools for ARM micros were very expensive. It was only 7 years ago that STM bought Atollic...

It's normal that you don't see ARM-based pulse detectors. That's because they're mostly used in commercial projects. Presumably, many forum members have high-level projects on their computers. A large coil doesn't consume much power.

I am a beginner, and the forum has taught me a lot. However, I have some questions that I hope someone can answer. In the posts, detectors made with op-amps are common, while those made with MCUs are rare. And when MCUs are used, they are typically AVR or PIC chips. Nowadays, ARM can be considered reasonably...

Okay, since the +5V supply is missing, it is very likely caused by the CD4093. Thank you....

Hello all,
I have 'inherited' one of these units from a friend of mine who has passed away.
Unfortunately absolutely no documentation with the unit.
I don't know if Willy Bayot is still participating in this forum, last posts go back many years.

Have found some old posts...

That looks reasonable. Often I lay out the preamp for thru-hole, then use an adapter board to plug in an SMT opamp.



Are you using an Hitachi-style alpha-numeric display? Many of those are daylight readable and include a backlight....

Please read the forum rules -> Basic Rules of the Forums​
and make your posts in English....

A quick note - at times I may be quiet for a day or three as I have some other projects going on also, work on this project is still going along.

I'm going to start on a KiCAD schematic, starting at the PS section...and don't plan to worry about the Bluetooth or display sections until the...

I'm thinking the TLV9362 opamp (successor to the NE5532) would be a good replacement for the MC33077 and MC33178.

Anyone think otherwise, or suggest a more suitable replacement?



The only other component questions (that I'm currently aware of) are:

...

Hello everyone. I am not here for sales. I am also a frontline treasure hunting enthusiast. The depth and mineralization resistance of my current detector are not very good. I hope to get a design that can reach a depth of 3 meters. Because in China, precious metals are usually buried at a depth of...

Hello everyone, I want to build an IDX Pro metal detector, but I am confused about the PCB versions.
Which is the final stable PCB layout (single layer) that is suitable for printing and etching?
I am looking for a black & white printable version (1:1 scale, mirror if needed)....

https://youtube.com/shorts/jsTnRgl7w...0modF8H0ssVVtd

ITMD3 includes 3 micro-driven PI projects, and schematics, Gerbers, and source code are posted in these forums....

The PI Detector is really simple to do but why you needed open source after then ask to produce in series mass production in mainland China and sell worldwide. I may create one but no motiv after knowing the goal to make money on my free research and development give away....

Is there an open-source PI detector at all? If so, what is its name?

Very interesting video, because it shows a real field limitation that many people do not fully understand until they experience it themselves.

Here, on some beaches along the Atlantic coast, especially in areas near Bordeaux and in the Landes region, we encounter black sands that are extremely...

It has now been a little over eight years since I started working at First Texas Products, for the Fisher, Teknetics, and Bounty Hunter brands, in the field of metal detection. I work as a physicist engineer, remotely from Europe.

Of course, I speak English with my colleagues, but languages...

Hi all,

AI is really great in inventing new names for "great inventions" made by him. At it is so proud of it.

Thank you for a nice explanation why in spectrum see many small periodic bumps. Interference from 2 coils.

I go online only with a laptop – I don’t use a smartphone. In the lower right corner, a sign that looks like a gear wheel appears – settings. You tap (click) with your index finger on the settings – you see the caption subtitles (1) off. Under the caption off, you see English – automatically...

Please post in English, thanks.

Hello everyone,
I am working on a DIY project to build a deep‑penetration pulse induction (PI) metal detector. I am looking for open‑source schematics, PCB layouts, and build plans for proven high‑depth designs.

If you have links to open‑source projects, Gerber files,...

​






Ok, I'm being a bit harsh... but basically that's it.
The level of "knowledge" and reliability of the AI ​​will directly depend on the level of knowledge of the person using the AI.
And that's where I put a full stop!
...

​

...

​

...

in a video
...

Kt35
What is the actual detection depth in meters?
How deep can it detect a 30 cm metal object?​

AI is just a bit more advanced calculator... in essence. ...

Puls Star 2 PRO real-world max depth (large coil)
Hi all,

I'm planning to build the Puls Star 2 PRO with a 1m×1m large coil (8m of wire), and I'd like to know what kind of performance I can expect.

For those who have built or tested this machine:

- What...

Hello kt315, I have a question regarding the difference between the Felezjoo and the DP. Both are excellent devices, but I see that each has its own characteristics. The Felezjoo has iron insulation and loses stability, while the DP is the opposite. I'd appreciate your opinion on which one to take with...

Your Gaussian curve looks slower than it should for 15Hz. This is what I come up with for a 15Hz target response sampled at 50Hz:

​
In general, the more you sample the more you can filter. The only reason most detectors used a 5ms loop rate is that processors of yore couldn't do...

Treat AI like it's your grunt worker. You come up with the ideas, then pass off the grunt work to AI.

You may find this Manticore vs AQ interesting:



This is at upper Newport Beach....

I have been trying to find scenarios where delay setting makes an obvious difference. I normally just detect in 7uS and have used other parameters to try and tame things down. This weekend I tried a setup using thin foil from a candy bar in different diameters and could see the smallest target (3/8”-1/2”)...

A swing like the one shown in the video is required, or perhaps even slightly slower. It is also important to remain very consistent: the coil must maintain a very stable height relative to the sand and stay as parallel to the ground as possible. This level of control then makes it possible to increase...

Thanks for contributing!
I think you should bring an English speaking friend along to translate. The majority of AQ videos are French language….
I’d like to see you do an air test of the target before you put it in the wet sand because my air tests are worse than your in ground tests....

PART 2

Just to be clear: the Manticore never outperforms the IMPULSE AQ on wet salt sand or on gold jewelry.

A lot depends on how the test is done, and misleading handling can easily lead to false conclusions. If the machine is not used correctly, the comparison simply does not reflect real performance....

I think will be ok.Datasheet says 10 ma output current.

Hello! May I ask which manufacturer produced the HEF4093 you are using? Would the HEF4093BT,653, manufactured by Nexperia, be suitable for use?​...

Hi all,

we are really far from AGI (Artificial General Intelligence).
https://en.wikipedia.org/wiki/Artifi...l_intelligence

I have invented a most powerful drawing transfer method (for fine arts) a couple of years ago and it isn't published yet.
So all the...

LOL. I am bathing in a chocolate bath ... the signal is just samples .. mine come in at 50 hz ... the integrators fully reset every 20 ms ( ie every cycle ) so theoretically it can detect a target in 20 milliseconds ..

OK how about I put variable loop rate control in ( just for you ) :...

Hi all,

the basic coil geometry description language is getting better. I have added a dmod command (delta modifier). So I can modulate angle, radius and z-position of wires.
Look at the chalice coil..

The simple code generates the coil.
...

This real math science is really trhiling a me amuzment by da way is not correct on target signal response it is not a continius signal so ewretinlg later is no relevant sorry to upset you again tell you just use 250SPS and all be well , and everything will be fine, and you'll be bathing in a chocolate...

regarding the loop rates ... 50 Hz is actually better than a fast loop rate.

Below is the comparison of continuous target, 200 hz rate, 50 hz rate and my code cubic interpolation .... giving a smooth signal response that is "near perfect".
If you make your loop faster than...

AI will give you all sorts of great answers .. but the proof is in the pudding ( or is it the eating ? ).

Anyway here is the frontend response for my sampling scheme from the C code.
The nulls are really sharp mains reduction wont be infinity obviously due to variance in mains frequency....

Ok just a quik note - I think I'm willing to give SMD - for chip devices - a go.

I found a youtube with a guy using soldering tools very much like mine, soldering STM32's and such on his bench, I think I can pick up his method / skill. Still thinking thru-hole for resistors, capacitors,...

like old Bulgarian Golden Mask 5 (like Mambo No.5 song of Lou Bega)...

Hi deemon,

nice new proposals.

As I have a second output channel on my sound card, I will compensate the high TX coil voltage with a transformed high voltage compensation signal. So I need a good signal transformer.
Mixing (adding) them together to 0 V (simulating...

Detektormods, you are the most knowledgeable about the operation of Minelab devices, I would like to ask you to tell me whether and how many coils distance he gpx 3500 or 5000 gpx can detect a 3.5mm diabolo? And with which coil?

Technical AI(google) Analysis:

Processing Speed ​​and Oversampling:
Carl-NC explains why a frequency of 200-250 Hz is used in metal detector signal processing. Although the useful signal from a metal object itself is slow (up to 15 Hz), sampling at 200 Hz allows for a much more...

I just want to say Just DIY like Carl Say with ADC 250Hz or 4ms delay between sample of the demodulated and amplified signal This is a correct way the Digital Rejecting Mains Filter 50Hz(60Hz) is just a DSP algoritham in MCU.

And if You Want to KNow-How or Why You Just Must a learn an Academic...

CD4093 will not working ok!Must be MC14093 or HEF4093.They have more power output.I have same problem when building SD2000...

Looks to reject mains very nicely. One point though is that there is a null at DC ... because this is a non motion detector DC must pass....

In every case of the +5 volts not being produced it always comes back to the 2n7000 failure. I’ve never seen any other fault as long as that 62 KHz signal is trying to drive it.

Hello. Thank you for your suggestions.The gate of the 2N7000 is connected to Pin 4 of the CD4093. Measurements taken at this point indicated a signal of approximately 0.8V (at a frequency of 62 kHz)—a voltage insufficient to drive the 2N7000. Consequently, I proceeded to measure the signal at the...

​Hello. Thank you for your suggestions.The gate of the 2N7000 is connected to Pin 4 of the CD4093. Measurements taken at this point indicated a signal of approximately 0.8V (at a frequency of 62 kHz)—a voltage insufficient to drive the 2N7000. Consequently, I proceeded to measure the signal at the...

Connect the grounds just like the schematic says. SW1 is the on/off switch and disconnects the (-) side of the battery instead of the more usual (+) but it works the same either way. When SW1 is switched off it then discharges C4 via R6.

I have no idea the Gerber, where did you get it from...

I also thank you, Orbita, for giving me more details about this project. I will try to reproduce it as you instructed....

Thanks Geo for the information....

Hello,

I attempted to build the probe based off the ITMD2 book design. I am unsure how I should connect the ground on a breadboard. I right now have all the 0v grounds connected to a rail that goes to the negative end of the C6 cap on the 78L05. The way I am reading the diagram shows the...

Calabash generally isn't the kind of guy to work with. He likes drama and that's what his videos deliver. It's very possible that the Manticore will edge out the AQ at a white sand beach, I've never tested it against the Manticore because I don't have one and white sand beaches are a long ways away...

Thank you!...

At this training ground, the coin is under a small stone in the area. I put a layer of approximately 10 cm. I ground approximately 50 to 60 kg of red ceramics and mixed the ground dust with black soil, which, even though it is heavy, I applied not to the place where the target was buried, but in the...

The value must be negative (-1.65V) with respect to GND.

Calabash (Digger)has been doing a bunch of YouTube videos that make the Impulse AQ and recently TDI look pretty bad. I don’t understand why his is doing so poorly. I feel mine doesn’t live up to the performance I’ve seen of others but I do ok with it.
1) Does someone have the self resonant...

Now I have another doubt, as my Stm32 is powered this way (VDD = power supply GND and VSS = power supply -3.3v), to give the preamp signal to the ADC input, I need to create a centered reference of 1.65v, should this 1.65 be positive or negative relative do circuit GND, so the ADC can read it properly?...

After some investigation with the oscilloscope this weekend I was able to trace the issue back to the 555-timer pinout. In the book R20=10k, R21=12k, and R22=220k. This created a pulse that turned the FET on 80% of the time not the other way around as it should have been, causing the overheating. The...

Might you post a photo of the coil - curious as to type of wire and any winding uniqueness.

...

Yes one way to determine that something in that part is to put as Detektormods said put an isolated dc on that line. Or remove the signal trace from the gate 2n7000 and connect it temporarily with the oscillator that you would have made from the 555 timer before that, set it to 62khz and it would give...

https://www.youtube.com/watch?v=kNcGf7gCshI&t=760s

The digital filters with integer coefficients are preferable for real-time applications but it is difficult to achieve desired frequency characteristics. In this work we will present one alternative solution of integer-coefficients...

I'm not sure if it would violate any rules to upload a compressed archive directly here; however, I can package the design files, schematics, and PCB layouts into a compressed file and send them to you. May I ask for your contact details?...

Put an isolated dc to dc converter module in It.

​Hello, thank you for your suggestions.
I have measured the 2N7000, and indeed, frequency signals are present on both its gate and drain. Could you give me a general idea of ​​what might be causing the 2N7000 to malfunction? I measured the resistance across the +5V and -5V rails to be in...

Hi all,

I am progressing very slowly with the coil software due to lack of time. But I am still progressing.
The evolution of the coil geometry description language takes some time.
This is looking like (placed in an external text file):
...

Check if there is a frequency on the gate and drain of the mosfet transistor that enables the positive voltage of the 2n700 or that you put in, if the frequency exists it would mean that the mosfet is not working! There I also tried a bipolar transistor for example bc547 and I get 5v. The line that...

N-channel MOSFET: PIN-D is connected to a 150 µH inductor, and PIN-S is connected to the negative terminal (-VB) of a 6V battery. Is this connection correct?​...

If the red connecting wires shown in the diagram are connected together, will this result in an abnormal +5V output?​...

If the red connecting wires shown in the diagram are connected together, will this result in an abnormal +5V output?...

The battery voltage is 6V. The low-battery detection circuit is functioning correctly; the LED flashes when the voltage drops below the threshold. The voltage measured between pins 2 and 3 of the LM336 is 2.5V. Test points at pins 2, 10, and 12 of the CD4093 measure a frequency of 62.5 kHz with a 50%...