Lrl from Italy

[FrancoItaly]

R1 in the power/display (1 led) stage is connected to +18V and together with R2 forms a voltage divider that halves the voltage of 18V.

[Kamal]

hello to everyone
does the effect of the sky interfere with the circuit

[Kamal]

my design

[Kamal]

hello , mr franco , i have a health wish for you .

is the effect of the sky . it 's okay no

[Kamal]

mr franco
shall we remove the predecessor ?

[FrancoItaly]

The coil is always the same.

[osman34]

Hello Mr. Franco. First of all, thank you very much. I need help with something? I tried to transfer your circuit. When voltage is applied, the yellow LED lights up and then goes out immediately. I can't see anything between the antenna and ground. I used BC183C LM358P 500k POT. Where exactly would the control points be?

[osman34]

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[FrancoItaly]

Originally Posted by osman34

Hello Mr. Franco. First of all, thank you very much. I need help with something? I tried to transfer your circuit. When voltage is applied, the yellow LED lights up and then goes out immediately. I can't see anything between the antenna and ground. I used BC183C LM358P 500k POT. Where exactly would the control points be?

The measurement to be made is at the output of the sensor stage R16/C18 (DC voltage) the other (1 LED) is out IC3A or (3 LEDs) out IC1A. in the new version with two tuning potentiometers it is still IC1A. 2 potentiometers allow for more precise tuning, furthermore the gain can be adjusted.