Lrl from Italy

[Hadi]

Hello guys,
kaligula, I advise another testing franko to you. You try to change the display stage with digital, such as voltmeter or uC.
So you set threshold over zero, maybe 50 mv by POT.
Now you must find real treasure environment. You will see some where you have negative sensing and other where positive sensing.
This is advantage of franko.

Best regards

[kaligula]

I have voltmeter. It is connected to end of display stage, so the pots don't have roll for voltmeter. In my test poligon in open environment I have sky and compass effect. At aluminum target I think voltage goes down. My little gold target maybe is catching, but I'm not sure because there are and other signals around. Is catching some strong signal far away on southwest. I'll try it to other place where i think there is real target so we'll see

[liudengyuand]

[abdou2014]

Thank you Mr Hadi , pls show us with a picture the exact point where we connect the

voltmeter in the display stage .

you told (pots don't have roll for voltmeter) you means the two potentiometers ??

[kaligula]

Thank you Mr Hadi , pls show us with a picture the exact point where we connect the

voltmeter in the display stage .

you told (pots don't have roll for voltmeter) you means the two potentiometers ??

You 're asking me?

[kaligula]

Thank you Mr Hadi , pls show us with a picture the exact point where we connect the

voltmeter in the display stage .

you told (pots don't have roll for voltmeter) you means the two potentiometers ??

I have voltmeter. It is connected to end of SENSOR stage, so the pots don't have roll for voltmeter. In my test poligon in open environment I have sky and compass effect. At aluminum target I think voltage goes down. My little gold target maybe is catching, but I'm not sure because there are and other signals around. Is catching some strong signal far away on southwest. I'll try it to other place where i think there is real target so we'll see

I made correction

[Hadi]

I mean the P1 potentiometer.
You surely find in real target some sensing.

https://ibb.co/dtA0Vb

[kaligula]

I mean the P1 potentiometer.
You surely find in real target some sensing.

https://ibb.co/dtA0Vb

Voltmeter, if you put it in display stage than it will be controlled by pots, but if you put it at emitter of tr5 in sensor stage than you cannot increase or decrease voltage by pots. It will be static and only when phenomenon is catched( or sky or compass effect) voltage will change

[abdou2014]

thank you for reply , I think you can not catch the phenomenon by connecting voltmeter at emitter of tr5 , you need more gain for that , i think we need fast stretcher , what do you think Mr Franco ?

[FrancoItaly]

thank you for reply , I think you can not catch the phenomenon by connecting voltmeter at emitter of tr5 , you need more gain for that , i think we need fast stretcher , what do you think Mr Franco ?

As I have said many times when there is the compass effect this means that the gain is enough, however I do not really like the use of the voltmeter.

[kaligula]

As I have said many times when there is the compass effect this means that the gain is enough, however I do not really like the use of the voltmeter.

Voltmeter is good to be connected to the out of sensor stage. First reason is that you can evidence and negative signals when voltage drops on some places. The second is that with voltmeter you can exactly find signal peak. If there is compass or sky effect you can't reduce it with potentiometers. You can reduce it in display stage, but not in sensor stage. By the way, I connected mine trough one transistor c945 and voltage goes from 4,44 v to 6,7v. My problem is that voltmeter is working at voltage s bigger than 4,2v so at 4,44v there is not good visibility on sun, and if voltage drops the voltmeter goes off

[VECTROUM]

Last pcb and parts

Hello to all, i want to construct this lrl and if it is possible i want the latest pcb and parts list because i am confused.

Thanks in advance

[FrancoItaly]

Hello to all, i want to construct this lrl and if it is possible i want the latest pcb and parts list because i am confused.

Thanks in advance

The sensor stage:

http://www.longrangelocators.com/forums/showpost.php?p=155345&postcount=1608

For other sections (power and display) there are several possibilities. For power supply I would recommend two 9V series batteries + 7812 that provides 12V stabilized.

For display stage I suggest the 3 leds version and change P2 from 470K to 1M and R1 from 150K to 56K, P1 from 22k to 4.7K and add 2 x 8.2K resistances, one from +12V and P1 and the other from ground and P1. The purpose is to make more easy the threshold operation but depending on the output value of the sensor stage you have to change the 8.2K resistances, i.e 10k/6.8K or 15k/4.7k or others.

[abdou2014]

Mr Franco you said ( when there is the compass effect this means that the gain is enough )
After you said we must ( change P2 from 470K to 1M and R1 from 150K to 56K ) this change increases the gain ???

[kaligula]

The device is OK. Nothing does not need to change. If the signal from compass effect is existing the device will register it. So you'll search with your back to north and you'll not have compass effect. If you reduce sensitivity to turn off leds on compass effect than your device will not register other signals weaker than compass effect. If you're replace parts in sensor stage to reduce sensitivity the effect is the same. But my question is does it detect gold with stability and by reducing sensitivity to can pinpoint it. I'll test it soon