Lrl from Italy

[mustefa ubram]

Franco, for a maximum voltage of 5 V output must be changed?
Is it possible to reduce the output voltage with op-amps

[Napsterce]

Hello Franco, the lrl is complete. Plastic box, antenna used from another device, wooden handle and the battery is external with 12.47 volts power from it. I have tested it and it reacts with the north, i dont get other signals, only that. What should i do to stabilize the compass effect? Thank you.

[FrancoItaly]

for Golden: the lrl detects front and sideways.

for mustefa: if you use a device that works at 5V you must reduce the output voltage of sensor stage (that may be also 8V or greater with a big target). Yes you may use an operational or a 5V zener diode and set the output voltage of sensor stage at about 4V.

For Napsterce: all the lrl works with a 12V stabilzed power. The only way to reduce the compass effect is to reduce the gain.

Best Regards

[mustefa ubram]

f
for mustefa: if you use a device that works at 5V you must reduce the output voltage of sensor stage (that may be also 8V or greater with a big target). Yes you may use an operational or a 5V zener diode and set the output voltage of sensor stage at about 4V.


Best Regards

thank you franco
How much output voltage sensor stage for standby?(When there is no target)

Which is part output is better? for connection to the Microcontroller?out put sensor stage?

[Napsterce]

Dear Franco, i have test field with cooper, will it give results, is it working with cooper or only gold?

[FrancoItaly]

Hi mustefa,
6V for me is the better value for standby, the output of sensor stage is the only output for other devices, Microcontroller or operationals.

Best Regards

[FrancoItaly]

Hi Napsterce,
I have no experience with all metals, but surely Lrl detects gold, silver and brass for my direct experience. More time the metal is buried, more strong is the phenomenon.

Best regards

[Napsterce]

Wikipedia: Brass is a metal alloy made of copper and zinc; the proportions of zinc and copper can be varied to create a range of brasses with varying properties;

Franco, according to this it is going to detect copper, we will know after a month or two. Thank you.

[dream_man]

Hello dear Franco ;
There are several capacitors like 100nF and one 33nF and so on. Which type of capacitors are better on your LRL? I mean ceramic disk, multi layer, polyester, or MKT ?
thanks for responding.

[FrancoItaly]

Because we are in the radio frequency bandwidth (8MHz) the better choice are the ceramic disk.

[dream_man]

Thanks dear Franco.

[Napsterce]

The lrl is tested at 3 places, 1 place without results, the other 2 places got all 3 led's glowing at gain set to 40-50% and sensibility set to 40-50%. The results are not 100% sure because it's not on a test field.

Franco i have two questions for you, how to tune the lrl to be sure it's not catching false signals and should i make a pcb with different values for L1 and C10 like in the picture? Thank you.

[pigeon]

picture

The lrl is tested at 3 places, 1 place without results, the other 2 places got all 3 led's glowing at gain set to 40-50% and sensibility set to 40-50%. The results are not 100% sure because it's not on a test field.

Franco i have two questions for you, how to tune the lrl to be sure it's not catching false signals and should i make a pcb with different values for L1 and C10 like in the picture? Thank you.

hi
I do not see any picture

[Napsterce]

Sorry, some problem with uploading, here it is.

[pigeon]

Sorry, some problem with uploading, here it is.

thank you