TESORO GOLDEN SABRE

[Max]

Can you explain in more detail what you are trying to achieve here?
Why do you only want to use one demodulator?


Your description is basically correct, but I'm not sure what wild_desert is trying to do. It doesn't make any sense at the moment. We need to wait for an answer.

Hi,
I think he wanna use one channel "demodulator" ... some sampling stuff connected to something atmel MCU.

But the problem is that usually there are two channels... one for geb and the other for disc path.

In case of amplitude stuff he'll use ADC; for phase issue instead he would use (probably) a comparator only.

But we know the problem is somehow a bit more complex...

Kind regards,
Max

[goxi]

help

Zdravo,

Stevan mi je rekao da mi ti mozda mozes pomoci. Imam Atlantis imperator. kupio sam ga pre mesec dana. Medjutim, kada sam ga probao pistao je na sve, iako sam ukljucio diskriminaciju. Otvorio sam ga i video da je vec radjeno nesto. Verovatno su mu pomerali ona 4 trimera. 3 plava i 1 mali okrugli. Da li ti imas semu za njega, ili mi mozes nekako drugacije pomoci. Ako imas vec takav, da li bi mogao da izmeris vrednosti tj. otpor pa da mi posaljes? Unapred zahvalan. Goran.

[Molzar]

PCB not ready yet. When ready i will post it for sure.
Center tapped coil means only TX with center tap. For example i used 0.25mm wire and 54+54 windings on already explained coil form/holder.
Wiring differs a bit. TX ends are connected with separate coated wires through cable. Center tap is connected to gnd at pcb. TX ends are connected at proper spots at pcb. Both faraday cages are also connected at gnd on cable (shield) and on pcb gnd.
Cheers!

Ivonic,

Looking also to experiment with center tapped coil. Here you say "Center tapped coil means only TX with center tap." I thought Rx was center tapped coil?
After looking at pcb connections this is only way make sense.

How is new scope working? Any new information on these coils?

Molzar

[amtech2005]

TESORO GOLDEN SABRE

Hello All , If a Center tap on the Tx coil , or even the RX coil helps , than use it !! Does the center tap go to a Ground or a shield wire ?? Or are we suppose to read 2 separate resistance values on one winding , and is the center tap creating a phase cancellation ??? The Tesoro coil charts posted just have a TX and Rx resistance value . Must be to ground because there is only a 5 pin connector ??................Thanks..............Eugene

[amtech2005]

TESORO GOLDEN SABRE

Hello , I found the answer from Ivconics earlier post , about the "TX" Center tap connection to ground........Thanks.................Eugene

[wild_desert]

Thanks to Max and Qiaozhi
Ex me for my delay(I have to make circuits for living and MD is my research).
You said: we must have 2 demodulator simultaneously. one for detecting phase change and other for amplitude change. And an or logic for detecting a target.
Is it true?
If true i say: micro can make precisely 2 squre wave needed for 2 demodulator and 2 low pass filter can make smooth dc voltage. next two 10bit ADC of AVR will sample dc voltages and micro can compare it with presaved numbers. any change in any channel means metal vicinity. Then micro can change phase clocks for discrimination purpose.
You see, we may have smaller circuit with more flexibility. Instead of potentiometers we have keyboard. Also auto GEB is a short procedure in our program. we can change many parameters by 4 keys + a basic LCD + menus.
I wait your answer
Kind regards

[Max]

Thanks to Max and Qiaozhi
Ex me for my delay(I have to make circuits for living and MD is my research).
You said: we must have 2 demodulator simultaneously. one for detecting phase change and other for amplitude change. And an or logic for detecting a target.
Is it true?
If true i say: micro can make precisely 2 squre wave needed for 2 demodulator and 2 low pass filter can make smooth dc voltage. next two 10bit ADC of AVR will sample dc voltages and micro can compare it with presaved numbers. any change in any channel means metal vicinity. Then micro can change phase clocks for discrimination purpose.
You see, we may have smaller circuit with more flexibility. Instead of potentiometers we have keyboard. Also auto GEB is a short procedure in our program. we can change many parameters by 4 keys + a basic LCD + menus.
I wait your answer
Kind regards

Hi,
it's like in digital VLFs: usually the phase of sampling gates is controlledby the MCU , often another MCU or the same do also the reading of values after adc stuff and make other computations, like for VID stuff, related to "phase" of targets.

If you try to generate the phase for sampling using the MCU you'll sure have easy work... just need to sync using an interrupt driven routine and use internal timer(s) to generate an opportune delay(s).

The adc reading, instead, seems much harder work if you'll use just simple sampling strategy... require hi-priced device to do so, the internal adc will fail on that if there aren't analog blocks before it, e.g. like just after sampling gates.

You could use another strategy: numerical integration.

Look for Robert Hoolko's project , it's a thread inside this forum: he made something similar and works, but then abandoned the project.

Kind regards,
Max

[ivconic]

Ivonic,

Looking also to experiment with center tapped coil. Here you say "Center tapped coil means only TX with center tap." I thought Rx was center tapped coil?
After looking at pcb connections this is only way make sense.

How is new scope working? Any new information on these coils?

Molzar

Did i wrote "TX"...???!?!?!? Yes i did!!!

Sorry, typing error! RX is center tapped NOT TX!!

Molzar thank you for observation and remark!
Best regards!

[wild_desert]

Hi,
it's like in digital VLFs: usually the phase of sampling gates is controlledby the MCU , often another MCU or the same do also the reading of values after adc stuff and make other computations, like for VID stuff, related to "phase" of targets.

If you try to generate the phase for sampling using the MCU you'll sure have easy work... just need to sync using an interrupt driven routine and use internal timer(s) to generate an opportune delay(s).

The adc reading, instead, seems much harder work if you'll use just simple sampling strategy... require hi-priced device to do so, the internal adc will fail on that if there aren't analog blocks before it, e.g. like just after sampling gates.

You could use another strategy: numerical integration.

Look for Robert Hoolko's project , it's a thread inside this forum: he made something similar and works, but then abandoned the project.

Kind regards,
Max

Hi Max
I don't want to do sampling on sine wave, although that is better but the ADC become expensive and busy the micro.

[wild_desert]

Simple Block Diagram

Let me show a block diagram:

[Max]

Let me show a block diagram:

Hi,
what's that magnetometer there ?

You just need RX coil to read out "phase" of targets...

The rest seems ok, but you'll get just 1024 discrete levels you can use for further operations at both channels.

Kind regards,
Max

[ivconic]

People,
this is TESORO GOLDEN SABRE topic!?

What the **** are you doing here with your off topic posts!?

Are you unable to start new topic?

You are spoiling TGS topic and buging here.

Wild Desert you are very anoying with your ideas here.

Go away and start new thread with your ideas.

[wild_desert]

Don't worry Ivconic, I like TGSL topics and want to be here
But Max and Ivconic
The 1024 discrete levels is better than offset errors of LM393. Is not true?

Now "magnetometer". I guess the wire path of OSC to Coil and ground effect on magnetic field can make some phase error. if we have magnetic field directly, we can overcome this errors. Is not true?

[ivconic]

Are you an IDIOT???

I just warned you.... and you are continuing more on same matters?

DO start new thread with subjects you are interested!
DO NOT continue here with off topic posts!

THIS IS TGS THREAD. DO POST ONLY THINGS RELATED TO SUBJECT!

[Fred]

Don't worry Ivconic, I like TGSL topics and want to be here
But Max and Ivconic
The 1024 discrete levels is better than offset errors of LM393. Is not true?

Now "magnetometer". I guess the wire path of OSC to Coil and ground effect on magnetic field can make some phase error. if we have magnetic field directly, we can overcome this errors. Is not true?

I think you are going to completely saturate you magnetometer with such strong fields so close.
Ivconic :
, regards,
Fred.