Lrl from Italy

[mokkethon80]

where..the new projek

[zakari]

HI FRANCOITALY

thank you so much for your new power and display stage

best regards

[darkman]

hi franco bro

thx's for Additions ;

* what is the point of using c2(100nf) between pin4(the Ground) and pin8(the power) of ic1 in DC Amp. stage ?
so we got now 4 leds instead of 3 leds ?

*why you using D1,D2 and D3 instead of A less value of ZD2 in 3 leds display stage ?


regards **

[FrancoItaly]

C2 avoids self oscillations of IC.
I use D1, D2 and D3 only because I think it's more difficult to find low values for the zener diode.

[darkman]

Originally Posted by FrancoItaly

C2 avoids self oscillations of IC.
I use D1, D2 and D3 only because I think it's more difficult to find low values for the zener diode.

thx bro

[zakari]

hi abdou2014

i couldn't send files to your email i put here

designer of this digital display is mr hadi magnet

he allow me to put here

[zakari]

hi abdou 2014

this video is provided with mr hadi

[zakari]

R22=1.8K
R23=1.5K
R27=2.7K
R24=100

[abdou2014]

Thank you

[volverint]

Originally Posted by zakari

hi abdou2014

i couldn't send files to your email i put here

designer of this digital display is mr hadi magnet

he allow me to put here

Hi Zakari

Can you share PCB ?

[FrancoItaly]

Hi all,

A member of this forum suggests a change to the input resonant circuit L1 / C10 (2.2nF) . It works just as well in his country and can be good for people who can not get my LRL in their country.


Best Regards

[liudengyuand]

When l1 fixed, we should have a formula to calculate the c10 with how much capacity of the capacitor, because there is no way this circuit using the waveform and frequency of the oscilloscope measurement c10

[FrancoItaly]

Hi liudengyuand,

the only way to find the best frequency is to try on the test field, by adjusting the core of L1 and varying the capacitance C10.

Best Regards

[liudengyuand]

But I think we should have a range of frequencies, so easy to choose components and measuring circuits work is good or bad

[FrancoItaly]

The frequency range of the phenomenon is from 60Khz (or less) to infrared. I think that each country has certain frequencies that work better than others. The only way is by trial.

[du6r]

dear FrankoItaly
I changed
c13 = 100n
c14 = 100n
on place c2 c3 c4 is 1 single capacitor 1p

The result is 5v at output
when i touch antenna voltage rise in mili volt

i put down underground two rings of silver 20 cm depth for 15 days at home

the device detect them at 1 meter away hardly

i get out to test filed with lrl to detect 2 kilograms of copper underground since 1 year depth 25 cm but nothing happen

does your lrl detect copper ?????????

Regard

[FrancoItaly]

I think that your lrl is ok, as regards copper I don't know, in my experience my lrl detects copper as other forum members said. You may try other frequencies for L1/C10.

[du6r]

Originally Posted by FrancoItaly

I think that your lrl is ok, as regards copper I don't know, in my experience my lrl detects copper as other forum members said. You may try other frequencies for L1/C10.

i will try change L1/c10

also i forget mention that also there is some Aluminum underground since two year and lrl didn't detect them

thank you

[FrancoItaly]

I have little experience on a real field, in my test field I detect gold and silver and in a real field a brass bullet. Unfortunately I do not have time to do other tests.

[FrancoItaly]

100 nF for C13/C14 it seems to much, try 4700pF or less.

[du6r]

Originally Posted by FrancoItaly

100 nF for C13/C14 it seems to much, try 4700pF or less.

i tried that but voltage in output 1.5 - 2 v

the best way to get output 5v is 100n ( for this lrl )

[FrancoItaly]

Also 1.5 may works well.

[du6r]

i will try

[liudengyuand]

I found the way to distinguish between the metal

[liudengyuand]

Use different lengths of antenna, can effectively distinguish between gold, silver, copper, iron and other metals