Andy Flind MFD.

[Guard]

https://www.youtube.com/watch?v=NiGuoENQNVg&app=desktop

TV detection over 10 meters

Also you say.
"10-meter television detection without exhausting the MFD due to the H / M noise of other home appliances".

First ... nice job !

Second, I think that "10-meter television detection" doesn't mean anything.

You tell us that the coil is resonate , with high "Q", at that specific TV frequency (-+55Khz, or whatever), so at 3,5,100, 1000Khz doesn't receive the fluorescent lamps, or what ever else ... ?
I think that every receiver-mfd act like this, when is resonate to a transmitter.

-------

This video i upload it today, is from my first (1st MFD) outside test (+60cm and is very close to metals) !
The sound is low, sorry (beeper inside, no hole, glued oposite to the coil)
Battery test outside from ++10m.

https://www.youtube.com/watch?v=CjQvV9nhDKU

To the end, the false beeps is the North, i turn it to see (i send it to a friend) the green led.
-------

These days my 6th MFD detects the watch easily from +1 meter and after many tests in 7th MFD ..........

The bigger joke is the distance of detection, for a ... "battery charged" - "working" - under ground - huge ... "clock"


.

[rxlock2]

It is very interesting. The coil used can be seen around the machine. What frequency does your own work?

[abdou2014]

[abdou2014]

I'll add an auther detector with andy circuit for more distance

[abdou2014]

Hi everyone, I had new results after some modification, I think my Andy flind works as a magnetometer, it detects a neodymium magnet at 4 meters, it detects any ferrous object at 1.5 meters, I want have a display circuit that distinguishes between iron and cavity ?
Thank you !

[abdou2014]

I think our friend G?o has an idea on the subject ???

[reza vir]

Hi everyone, I had new results after some modification, I think my Andy flind works as a magnetometer, it detects a neodymium magnet at 4 meters, it detects any ferrous object at 1.5 meters, I want have a display circuit that distinguishes between iron and cavity ?
Thank you !

hi Congratulation
do you test real burid metal?

[abdou2014]

I do not intend to use it for the detection of buried metals, I have two LRLs which works very well, it is for detect cavities , it's magnetometer .

[shahrayar]

Hi everyone, I had new results after some modification, I think my Andy flind works as a magnetometer, it detects a neodymium magnet at 4 meters, it detects any ferrous object at 1.5 meters, I want have a display circuit that distinguishes between iron and cavity ?
Thank you !

Can you send me the diagram I want to make this device
Is there a topic for this device in the forum?

[abdou2014]

The diagram is in the tread ( andy flind mfd ) I just added a ULF preamp with special 10H coil that I designed

[shahrayar]

I found the topic, you only help in unnecessary and useless conversation

[Geo]

Few days ago a friend sent me a new "release" of Andy's MFD. I tested it and it is more more sensitive than mine MFD. A very good implementation from a non enginear guy!!!

[Pahom]

Few days ago a friend sent me a new "release" of Andy's MFD. I tested it and it is more more sensitive than mine MFD. A very good implementation from a non enginear guy!!!

Good night Geo! If it does not bother you, tell a little about the controls of the device. Which is responsible for what. Your friend refused indication on lm 3915 what do you think with what it is connected ?.

[Geo]

It is something difference. My friend disconnected the Andy Flind's pcb and connected a pcb from data comunication with high gain.
See the new photo with text at every control.

[Pahom]

It is something difference. My friend disconnected the Andy Flind's pcb and connected a pcb from data comunication with high gain.
See the new photo with text at every control.

Thanks!!! I also think to turn off the LM 3915. I noticed that with this node the response from the spark is a little late and reduces the distance by a quartz watch. Until I understand why this is happening. And at what distance does this device catch the movement of a quartz watch? So far, I have a spark from 1.5 volts to 2 meters and a 7cm clock with confidence.