Andy Flind's MFD Revisited

[GOLDEN LILLY]

Hello forum members,

I found the schematic of Andy Flind Magnetic Field Detector in the internet. I heard that this is a good start for an lrl. However, the image is not clear and it lacks three (3)resistor values in 4066 section. Is anybody out there who has knowledge on the correct values of the resistors or a copy of the article where it is published? Any assistance is highly appreciated. My e-mail add is errel74@yahoo.com. Thank You...

Regards...

[reza vir]

Originally Posted by aulook

Hello forum members,

I found the schematic of Andy Flind Magnetic Field Detector in the internet. I heard that this is a good start for an lrl. However, the image is not clear and it lacks three (3)resistor values in 4066 section. Is anybody out there who has knowledge on the correct values of the resistors or a copy of the article where it is published? Any assistance is highly appreciated. My e-mail add is errel74@yahoo.com. Thank You...

Regards...

[Mike(Mont)]

In some of Dell Winders old brochure material he says if a magnetometer was three-hundred times more sensitive it could pick up a discriminated signal line from a frequency generator. Not likely a magnetic field detector is going to pick that up.

[GOLDEN LILLY]

Hello rez, thank you for the reply. Is the one you posted another magnetic field detector of Andy Flind or different. I don't see any 4066 used in that circuit. Can u explain about that circuit?

Regards...

[reza vir]

Originally Posted by aulook

Hello rez, thank you for the reply. Is the one you posted another magnetic field detector of Andy Flind or different. I don't see any 4066 used in that circuit. Can u explain about that circuit?

Regards...

The other circuit is a
But that does things
And almost one and the same
But I think these circuits are not capable of detecting treasure
******************
Do you have more quality circuit?

[GOLDEN LILLY]

Thanks Geo. So the function of 4066 or 4016 (bilateral switches) are tone generators. I don't expect that these component is capable of producing tones. Maybe it incorporates positive and negative voltage to produce amplified ac output to drive a transducer, this is only my opinion. Now its clear to me.

Regards...

[ban1345]

hi aulook
I have a circuit but i can't post to forum
i can post circuit to your mail
thank aydin

[GOLDEN LILLY]

Hello Ban, thank you for your kindness. I hope you can send it to my email at the earliest possible time.

Regards...

[ban1345]

Originally Posted by aulook

Hello Ban, thank you for your kindness. I hope you can send it to my email at the earliest possible time.

Regards...

helo aulook
I posted schematic please look your mail's
thanks

[Geo]

Originally Posted by reza vir

This schematic is not the AndyFlind's MFD, it is from Elektor.

[Geo]

Originally Posted by aulook

Hello forum members,

I found the schematic of Andy Flind Magnetic Field Detector in the internet. I heard that this is a good start for an lrl. However, the image is not clear and it lacks three (3)resistor values in 4066 section. Is anybody out there who has knowledge on the correct values of the resistors or a copy of the article where it is published? Any assistance is highly appreciated. My e-mail add is errel74@yahoo.com. Thank You...

Regards...

Resistor at pin6 of 4016 is 1M.
Resistor from 47n to pin12 of 4016 is 82k.
The other resistor (V+ to pin 12) is 22K.
But i am afraid that there are errors.

Good luck

[GOLDEN LILLY]

Thanks for the resistor values Geo. In case the values are not correct, i will make some experiment.
Anyway, can you explain why a bilateral switch (4066) is used after the CA3130, I mean what is its purpose? I'm not an electronic expert so I need assistance. I wish i have the complete article of this project for a detailed explanation.

Regards to all...

[Geo]

The purpose of 4066 or 4016 is to create a tone (beep) generator.