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Offline TRXTopic starter
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« on: November 18, 2010, 11:38:04 am »
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Hello.

I want to build a simple and cheap MD.
I need to find a little 1cm/1cm metal object, that I lost in my back yard on the surface, so I don't want anything fancy.

At first I wanted to build the first MD from the links i posted #1  . I knew that I had ~5 kg of the right copper wire for the coil, but i can't find it anywhere, so I am left with only ~ 3kg of 1.81 mm (13 awg) , ~ 25 meters of 0.54mm (23.5 awg)   and plenty of 0.21mm (32 awg).

The question is, what coil can i make now and for what metal detector.



Hope that somebody takes the time to answer.
Thank you.



#1

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http://www.geotech1.com/forums/attachment.php?attachmentid=12512&d=1276694810

#2

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http://www.geotech1.com/pages/metdet/projects/matchless/matchless150c.pdf

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http://www.geotech1.com/forums/attachment.php?attachmentid=12518&d=1276812705

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http://www.geotech1.com/forums/attachment.php?attachmentid=12326&d=1275418002

#5

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CCO Metal Detector 2009_2.pdf


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« Reply #1 on: November 18, 2010, 12:12:25 pm »
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 Hello Hello

HAVE ALOOK AT YOUTUBE DUDE AND HOW UNDER HOW TO MAKE A METAL DETECTOR.....

HAPPY HUNTING

 Rider

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« Reply #2 on: November 18, 2010, 12:48:13 pm »
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Hello TRX!

Please post in:

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http://thunting.com/smf/new_user_introduction-b3.0/


It's costomary to introduce your self in these parts.

Have you looked at Simple BFO circuits?

Those all look like TR type.

BFO is much simpler.  If it's on top of the ground, it will find it.

{alt}



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« Reply #3 on: November 18, 2010, 03:02:42 pm »
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I'm more interested in the coil, I can make any PCB, but don't have enough copper wire for the coil I want. I was asking what coil can I make with the wire i have for a MD.

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« Reply #4 on: November 18, 2010, 03:29:18 pm »
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You Need to make the coil as Prescribed in the Schematic for it to work.

If your short on wire, dissect the yoke from a old TV,  or buy some.

Best to Buy.

That way you get what you need and don't wast your time with crummy used wire that could short out on you.

That's the way.

Sorry.

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« Reply #5 on: December 02, 2010, 10:50:10 am »
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I made "poor's man metal detector"
Not very happy with it, it's good for big metal targets but not for small metal peaces that i need.

Now I'm considering to make houndogs IB metal detector or a simpler PI  "surf pi v1.2"

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« Reply #6 on: December 02, 2010, 12:57:37 pm »
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Hi,
Have a go at this one...

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http://thunting.com/smf/vlf_designs/epe_bounty-t15096.0.html


It is INCREDIBLY easy to build and it's very, very good!
It WILL find a 1" coin at six or seven inches!


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« Reply #7 on: December 02, 2010, 01:15:22 pm »
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This is also simple and does note require shielding for the coils.

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http://www.geotech1.com/pages/metdet/projects/houndog/houndog150.pdf


What do you say about it ?

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« Reply #8 on: December 02, 2010, 03:57:10 pm »
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Quote:Posted by TRX
This is also simple and does note require shielding for the coils.

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What do you say about it ?


I wouldn't think it would be as sensitive as the one I suggested.
I built the "bounty" in an evening, shielding the coils isn't a hassle - dead easy.
I was surprised how stable and sensitive it is.
Six inches or so on a 1 inch coin with less than a  a handfull of components isn't bad!


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« Reply #9 on: February 12, 2011, 07:30:31 am »
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Search for coins really so good?

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