Real Metal Detectors

[amtech2005]

Real Metal Detectors

Hi again , Fred . The writing on PCB is not proper english. This detector was used inside a "Factory" then modified to be used "outside" in the field. Electric tape might be covering a "FUSE". And do you see the 6 empty pcb slots/holes in top-right corner ?? I am finished with this unsolved-mystery for now , I gave it my best effort and many hours NO CHARGE ... Thanks Michael for the challenge . I have other projects and very little time now , Not enough data to Solve the "Big Mystery" at this time.........Eugene

[roberts]

It is sort of PI detector, no doubts any more. I needed to really push Michael to his limits to make him post complete photos here!
Also seems some components are missing.Doesnt mean it was AC device.
About English terminology, i can not judge,i am also "alien", not English language expert as you see.
White box probably covers timing circuitry and LCD driver.
Only one important question left uncleared - is it good? Only Michael do know the real answer. But he already said "bye" so bye Michael.

Esteban i am not talking about great history.I refered "banana" to recent events here. Great people and heroes from here are sold to foreign extortions for "20 silver coins"!
For me this is sure evidence of being "bananized" already!

[Esteban]

It is sort of PI detector, no doubts any more. I needed to really push Michael to his limits to make him post complete photos here!
Also seems some components are missing.Doesnt mean it was AC device.
About English terminology, i can not judge,i am also "alien", not English language expert as you see.
White box probably covers timing circuitry and LCD driver.
Only one important question left uncleared - is it good? Only Michael do know the real answer. But he already said "bye" so bye Michael.

Esteban i am not talking about great history.I refered "banana" to recent events here. Great people and heroes from here are sold to foreign extortions for "20 silver coins"!
For me this is sure evidence of being "bananized" already!

Yes, you're right! Wishes best times for all you!

[Esteban]

Michael, wich kind of battery uses the detector? Did you can trace schematic? In appareance, in the "HV section" is more electronics.

Regards

Esteban

[Fred]

Hi again , Fred . The writing on PCB is not proper english.

Hi Eugene,
Are you sure? searching at the exact phrase i can find a few results all related to research ...Could it be an expression used by scientifics?
Interestingly, searching at the other written stuff (repair...) i find similar scientifical results...
For the empty holes it could be some optional connectors, but not AC IMO.
regards!,
Fred.


PS: Esteban, Michael told us it uses a 12V battery,and the schematic could be easily traced from the pictures, but i dont think it is worth it, it surely a PI with signal going and coming from the white box,the heart of the detector.

[amtech2005]

Real Metal Detectors

Fred , This Mystery will be solved soon !!! And when we find out , we will be shocked it will be something that is not Your normal type of P.I. Detector !!!!! .....I think this detector is from a factory , or used outside a Big Mining operation to make sure no metal teeth from the "Earth movers" or Dozers are not lost in the Dirt............Eugene...

[Qiaozhi]

The wording on the white box is not good English - "This device is repairable by experts and should not be applied by unskilled person."

Surely this should read - "This device is only repairable by experts and should not be opened by an unskilled person."

It also says "Made in U.S.A" - note the missing dot after the A.
This white box still looks like a DC/DC converter module, otherwise known as a DC/DC brick.
Maybe you should try searching for the module, rather than the detector.

[Fred]

Hi Qiaozhi,

The wording on the white box is not good English - "This device is repairable by experts and should not be applied by unskilled person."

Surely this should read - "This device is only repairable by experts and should not be opened by an unskilled person.".

This could be 2 different things (?):
"This device is repairable by experts "
and :
"This device should not be applied by unskilled person."
or not?

It also says "Made in U.S.A" - note the missing dot after the A.
This white box still looks like a DC/DC converter module, otherwise known as a DC/DC brick.
Maybe you should try searching for the module, rather than the detector.

Here i respectfully, but completely disagree .The detector could not work if it was only a DC/DC converter.The LCD control, timing and signal processing are done there.

Small research teams sometimes have to develop their own device for a particular purpose, and use the material they can reach.they don´t need fancy enclosures etc., just a working device, and they usually have plenty of time but not alway the necessary knowledge, as their goal has nothing to do with the means involved to achieve them.

Eugene seems to follow a lead, i hope he will have news about all this.It is interesting .

Regards,
Fred.

[Esteban]

Hi Eugene,
Are you sure? searching at the exact phrase i can find a few results all related to research ...Could it be an expression used by scientifics?
Interestingly, searching at the other written stuff (repair...) i find similar scientifical results...
For the empty holes it could be some optional connectors, but not AC IMO.
regards!,
Fred.


PS: Esteban, Michael told us it uses a 12V battery,and the schematic could be easily traced from the pictures, but i dont think it is worth it, it surely a PI with signal going and coming from the white box,the heart of the detector.

Fred, thanks. Is very difficult to open the white box? There is a kind of hard-glue in circuitry-PCB or what?

Regards

Esteban

[Fred]

Fred, thanks. Is very difficult to open the white box? There is a kind of hard-glue in circuitry-PCB or what?
Regards
Esteban

Michael says there is no way to open or look inside the box.Maybe he could find some srews or fixing devices below the sticker.
regards,
Fred.

[olympios]

Hi,
..........
But I think is not USA made, nothing say that ...but the opposite, is sure made in another country and all labels are there just to mislead people...
..........
Max

Max, I agree with you.

A few months ago, I used Protel and designed a little board (2 inch x 4 inch), just a pulse width modulator. To have two boards made, here in USA, it would cost me $60. Have them made in China, only $2 each!!! That's why, if you open any electronic device, you will not see "Made in USA" anywhere. It is either China, Phillipines or some other oriental country. That doesn't mean nothing though. Look at some very expensive hospital equipment like Xray machines, MRI and others. Do they say "Made in USA"? No, they don't! Most likely Japan or China. Does that make them bad?
So, what is the big deal about a Metal Detector. Does it have to be made in USA in order to be good? I highly doubt Michaels MD is USA made. English is my second language but I can tell that the labels on the device were done by people who are no experts in english language. Even the "CALIBRATED AT 2002-USA" is not correct. Calibrated "AT" (year) 2000? Doesn't sound right. Also, the way cables are lined up in there doesn't look professional. Very likely, a prototype. Then again, this doesn't make the unit bad. In fact, it can have some unique features that no other PI MD has.
Now, Michael is an expert Treasure Hunter and has used many different kinds of equipment. If he says that the device works better than other similar devices, I have no reason to disbelieve him. He has no reason to lye to us as he doesn't sell or advertise anything.

[amtech2005]

Real Metal Detectors

I will share my search list and what areas I have been looking for , and what I am Looking for NOW !! Since I do not know when to Quit !!!! I will be looking again tonight !! A lot of "Look and Looking" words

Names of companies I have checked and I will re-check again Tonight:

1.Thermo electron / Ramsey , Mining and Engineering
2. Allen
3. Loma
4. Eries
5. Icor
6. Cintex

So , food processing metal detection companies, medical applications , restuarant applications like silverware retrieval . And finally one big area which I have only checked once , was military applications. When we do find this product information , it will be a Great potential Project to build later , or just learn from the design. We are completely safe to Proceed , Do you know Why????? Because the " ANONYMOUS" people who made this, Do not care about copyrights , or the company name would be posted all over the plastic box , the PCB Board and the search-coil !!! OOPS , Where is the search-coil ?????? Thanks again to all the members who are trying so hard , Like they always do , just to help others when they need it...............Eugene

[Max]

Hi again , Fred . The writing on PCB is not proper english. This detector was used inside a "Factory" then modified to be used "outside" in the field. Electric tape might be covering a "FUSE". And do you see the 6 empty pcb slots/holes in top-right corner ?? I am finished with this unsolved-mystery for now , I gave it my best effort and many hours NO CHARGE ... Thanks Michael for the challenge . I have other projects and very little time now , Not enough data to Solve the "Big Mystery" at this time.........Eugene

Hi,
you're right about the holes:

the 4-holes are for a silicon bridge , round kind , probably rated under 2A.

3 remaining holes are probably for cables that goes to a panel connector, used to supply device by an external powersupply/charger.

Consider that both AC power and DC could be made available for device, since the positive rail goes to connector leads too. This could mean device was intended for both indor usage (like an industrial e.g. conveyor detector) and supplied by a DC power source too... no matter if is a powersupply or e.g. an UPS with a big battery: some factories oriented devices MUST provide UPS connection and give uninterruptable service even in case of blackout.

Another possibility is that device was provided with e.g. a car adaptor, in wich case the bridge rectifier remains unused and the detector will be powered by car electric system/battery. This is , indeed, really probable considering that some depth PIs are actually employed that way... suspended coils e.g. carried at distance by a 4WD or pickup. I remember was an "australian desert" most wanted feature somewhere (for big nuggets)!

Kind regards,
Max

[Max]

It is sort of PI detector, no doubts any more. I needed to really push Michael to his limits to make him post complete photos here!
Also seems some components are missing.Doesnt mean it was AC device.
About English terminology, i can not judge,i am also "alien", not English language expert as you see.
White box probably covers timing circuitry and LCD driver.
Only one important question left uncleared - is it good? Only Michael do know the real answer. But he already said "bye" so bye Michael.

Esteban i am not talking about great history.I refered "banana" to recent events here. Great people and heroes from here are sold to foreign extortions for "20 silver coins"!
For me this is sure evidence of being "bananized" already!

Hi,
I think preamp with scraped label could be actually an NE5534 ic. Other preamps could be there... but NE5534 is very common in many PIs still today at preamp stage. I think too isn't nothing from mars...

The two diodes, like you said are sure a clamping network... probably device push hi current in the coil... and spike is very high... probably in the 400-500V range

Kind regards,
Max

[Max]

something like this...