PinPointer- Has anyone seen or built this?

[dom44]

Hate to burst your bubble this is not a pin pointer it is an AC finder. I speak Italian its to test walls before you drill a hole.

[MartyJ1963]

@Pustareka,,,,Thanks for the files and the link. Do you know where I can find a Parts list please? I would like to have a try at building this. Thanks. Marty

[pustareka]

@Pustareka,,,,,,The file that you attached says that it contains no archies or is damaged. Thanks, Marty

http://vash-ru.net/anker/images/file/q-meter5.zip

http://vash-ru.net/anker/a_pp_q-meter5.shtml

[MartyJ1963]

@Pustareka,,,,,,The file that you attached says that it contains no archies or is damaged. Thanks, Marty

[pustareka]

Анкер Ку-метар / Q-metar

[WM6]

What is the Inductance of the Coil?

There are this data on ferrite coil construction:

220 turns on ferrite rod (dia 8mm lenght 50mm; antenna ferrite) using wire dia 0.15-0.18mm.


Air core coil:

There are different data on air core coil inductance around (from 1500uH to 2290uH).
Mine 7cm dia coil is 1300uH.

Example of air coil winding: 90 turns of 0.3mm wire on 150mm diameter round body.


Builder should follow coil oscillator resonance which should be 18-22kHz (by manipulating C2).

[Tibuck19]

The coil with ferrite rod is very sensitive to the magnetic earth field, so it is recommended to use only a coil without ferrite core. I had made it as a pinpointer-digging tool, that shape of coil is working as well.

https://www.youtube.com/watch?v=lIhCbY1SLVA

or here

https://www.youtube.com/watch?v=7vOwAg6PqLc&t=44s

Nice looking mini shovel/pin pointer

[blobber]

Very nice and already on my to do list.
Here i found some more informations.

http://ra4nal.qrz.ru/metall.shtml

[kt315]

just read Eddy suggestions, he is here. remember he is faraway from his family. you know there is the war. real war, with tanks, artillery and constant
sniping fire. i read 4 boys had blowned on a mine.

he left his laboratory and a job. also he answered me he does not have an access to his website to update (no password).

[chemelec]

What is the Inductance of the Coil?

[WM6]

Does it need to be a circle coil or can it be made with a ferrite core rod like most pp are ?

This early version of Maljish FM w3as built with small ferrite core coil (value 1.4mH).

http://s-x-e-m-a.ru/lubitelskie/home/metallodetector/metallodetector.html

[blobber]

The coil with ferrite rod is very sensitive to the magnetic earth field, so it is recommended to use only a coil without ferrite core. I had made it as a pinpointer-digging tool, that shape of coil is working as well.

https://www.youtube.com/watch?v=lIhCbY1SLVA

or here

https://www.youtube.com/watch?v=7vOwAg6PqLc&t=44s

[Tibuck19]

Yes it works decent.

You can buy Malysh as (all ready soldered, inclusive 5cm coil,
what you need more is housing) kit from this Bulgarian guy:

http://newhobby.eu/pinpointer-with-discrimination.html

Does it need to be a circle coil or can it be made with a ferrite core rod like most pp are ?

[WM6]

just Eddy's Malysh has real full discrimination FERROUS-NON FERROUS.

.

Yes it works decent.

You can buy Malysh as (all ready soldered, inclusive 5cm coil,
what you need more is housing) kit from this Bulgarian guy:

http://newhobby.eu/pinpointer-with-discrimination.html

[MartyJ1963]

@Chemelec,,,,The original article came from a Nuovo Elettronica Magazine that I downloaded from the Internet but it's a 57mb PDF file.
@KT315,,,,The Malysh is on my ''To build'' list,,,and yes, Eddy is good at layouts etc,,and I agree that the Project I posted isn't very advanced and just posted it out of interest. Thanks. Marty