Lrl from Italy

[FrancoItaly]

[QUOTE=toorani;156421]

In your opinion, with these conditions my lrl is ok?
Can I put it inside the box?
The box with aluminum foil does not create capacitive capacities?
What is lrl reaction to the target?
Or, by placing the L1 vertically, the sensitivity to the north pole and south will decrease?

yes but if is necessary you may increase gain by decreasing R17 (from 150K to 47k), by increasing P2 (from 470K to 1M)
You can put the lrl in the box.
The shield do not disturb.
The target increases the DC signal (sensor stage output)
I think that the L1 place is not important. Too much gain causes the compass effect.

[toorani]

[QUOTE=FrancoItaly;156422]

yes but if is necessary you may increase gain by decreasing R17 (from 150K to 47k), by increasing P2 (from 470K to 1M)
You can put the lrl in the box.
The shield do not disturb.
The target increases the DC signal (sensor stage output)
I think that the L1 place is not important. Too much gain causes the compass effect.

hi franco dear
What do you mean by r17?
Is the same r1 in the display stage?
Thank you so much.

[FrancoItaly]

[QUOTE=toorani;156423]

hi franco dear
What do you mean by r17?
Is the same r1 in the display stage?
Thank you so much.

This is the schematic, yes I refer to display stage (3 leds)

[toorani]

watch these videos:

https://www.youtube.com/watch?v=lp35Ly8Cw1Q

https://www.youtube.com/watch?v=BUzyKuUQExE

https://www.youtube.com/watch?v=BQfyqmgCdcY

I ask Panos Pappas few details on the type of metal and even distance is revealed. To Mustefa I said: good work.

hi franco dear
Should lrl have two antennas?
I installed an antenna one meter.
Are the leds turned off be exactly above the target?
Thank you so much.

[FrancoItaly]

hi franco dear
Should lrl have two antennas?
I installed an antenna one meter.
Are the leds turned off be exactly above the target?
Thank you so much.

An antenna works well.

Yes the signal goes off about above the target.

[FrancoItaly]

Hi Zixelll,

I respond here because your inbox is full:

The stylus antenna is better because you can increase the sensitivity by lengthening it.

This voltmeter is not suitable, as I see it has 500V full scale. My lrl is designed for led display.

[afshin]

Hi dear franco
Thank you for sharing your lrl.
What is your orginal pcb size?
Thank's

[toorani]

hi dear franco
I put lrl in the box.
My lrl responds to some things,for example:
Thermal glue,Refrigerator engine,Lamp,Gas stove lighters,Oscilloscope.
In your opinion,This is the correct performance?
Thank you very much for your guide

[FrancoItaly]

Hi dear franco
Thank you for sharing your lrl.
What is your orginal pcb size?
Thank's

These are roughly the original dimensions, however the dimensions are not critical, especially if you use the double-sided pCB.

[FrancoItaly]

hi dear franco
I put lrl in the box.
My lrl responds to some things,for example:
Thermal glue,Refrigerator engine,Lamp,Gas stove lighters,Oscilloscope.
In your opinion,This is the correct performance?
Thank you very much for your guide

My lrl has a high gain amplifier and any rf source may disturb, then this behavior is normal.

[toorani]

hi dear franco
Is it possible to reduce the Voice of buzzer?
Thanks dear Franco.

[FrancoItaly]

hi dear franco
Is it possible to reduce the Voice of buzzer?
Thanks dear Franco.

There are several possibilities:
- use another type of buzzer.
- put a resistance in series to the positive or negative of the buzzer, the value is to be tested.
- put the buzzer inside the box, in this way the sound is attenuated.
- I use a switch to exclude it.

[afshin]

Hi mr fracco
And thank you for members guidance
Mr franco what kind of adjusting threshold is true?
I meaning is that how we adjust LED threshold OFF towards surrounding?
1-when anten is front and horizontal?
2-or anten is to the sky and vertical?(and neutralization of sky effect)
3- or else way?
What way is best and standard to searching and detecting targets?(Hi sensitivity and correct way)
Thank's

[FrancoItaly]

Hi mr fracco
And thank you for members guidance
Mr franco what kind of adjusting threshold is true?
I meaning is that how we adjust LED threshold OFF towards surrounding?
1-when anten is front and horizontal?
2-or anten is to the sky and vertical?(and neutralization of sky effect)
3- or else way?
What way is best and standard to searching and detecting targets?(Hi sensitivity and correct way)
Thank's

If the lrl is well adjusted there is no compass effect, normally the antenna must be parallel to the ground and the threshold must be adjusted to get the first LED off, approaching the target you need to slightly tilt the antenna downwards (to get the maximum signal), the signal disappears completely around the vertical of the target. All this moving in the north / south direction, in this way the sensitivity is maximum.

[afshin]

Thank's mr franco
But in this way ( parallel to the ground and then adjusting the threshold)when I move the antenna to left and right or downward or upward the LED be ON.Does my lrl work normal and correct or not?
Thank's