Lrl from Italy

[FrancoItaly]

what are the errors in our pcb, what are the particular thing in dream-man design ???

is this PCB correct, (mustefa modified ) ???

I have not tried this PCB. My PCB is Ok, perhaps not professional but it's almost impossible that self oscillates.

[zixelll]

Hello my friend, did you build this circuit?

[FrancoItaly]

Hello my friend, did you build this circuit?

I said that I not tried this PCB, but the schemas is correct.

[abdou2014]

what should it be far away and from what, so that we do not have a self oscillation ???

[FrancoItaly]

what should it be far away and from what, so that we do not have a self oscillation ???

As I said many times, the lrl has a very high gain and for me it's better to use a single PCB
for sensor stage (better is it's double face). If the gain is poor the lrl cannot reveal the phenomenon also is all parameters are OK.

[abdou2014]

the fact that I have the sky effect, I do not think I have a low gain, I will put a piece of aluminum connect to the ground between the sensor and the display ,

[FrancoItaly]

the fact that I have the sky effect, I do not think I have a low gain, I will put a piece of aluminum connect to the ground between the sensor and the display ,

If you have not only the sky effect but also the compass effect the gain is good, not necessary other changes.

[abdou2014]

I also have the effect of the compass, the led lights up towards the south .

[zixelll]

This is for me a real mistery. Perhaps an imperfect calibration or a not good target for tests.

You can give a full explanation of the calibration, thanks so much

[FrancoItaly]

You can give a full explanation of the calibration, thanks so much

Here the helps

[zixelll]

Thanks c10 should also be set to l1?

[FrancoItaly]

Thanks c10 should also be set to l1?

in my lrl works well in the range:
for L1 2 or 3 turns
for C10 from nothing (there is always the parasitic capacitance base/emitter of TR2) to 33pf
(that's 10 or 15 or 22 or 33pF)

[HaFar2010]

Hello
Dear All.
In 8Mhz version, i can't find D1 and D2 (1N414P). Please introduce an alternative.
Thanks.

[abdou2014]

1N4148 not 1N414P

[HaFar2010]

Thanks my friend.