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 Replies: 10 / Views: 3,751 |
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New Member
United States
28 Posts |
Hello! I am thinking of building a metal detector for a project, and I am looking for advice to add discrimination to it. Building one from an Arduino seems interesting, but I am not very experienced. Does anyone have any tips on adding good functionality or just building it in general? I appreciate the help!
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Pillar of the Community
Canada
532 Posts |
I looked at you tube for tips...Then decided to just buy one. Maybe start there?
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Pillar of the Community
Australia
1015 Posts |
This is just my experience I would like to relate to you,
I brought a electronics kit detector called the ETI 1500 in the late seventy's the cost with a copper etched board was around $230 AU,
it took me 45 hours to place and solder the resistors/transistors/chips (555 timers) capacitors and diodes then another 2 hours to trouble shoot with an oscilloscope to find some soldering problems I caused my self,
I regretted the hours building it but it was an accomplishment and I did find my very first nugget with it.
I don't know what the kit's are worth these day but it my be easier and much cheaper to buy an ACE 250 or even a second hand unit again it's up to you and again this is just my experience.
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New Member
 United States
28 Posts |
That might be a good idea. The purpose of the experiment is to determine how the coil size/ transmitting frequency affects the efficiency of the detector, so I suppose I could try that. I might want to still give it a shot building my own.
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Pillar of the Community
Australia
1015 Posts |
I use a variety of detecting heads on my Minelab GPX5000
these are (most) mono elliptical and all in inches,
14" (a killer on small nuggets),15",17" and 22" I find the 22" draws a lot of current but the round 24" DD (the coil overlaps another winding this is referred to as a double dee or DD)draws the most and can shorten the battery by a few hours,
My detector has a multitude of frequency and I tend to get the same battery life no matter what frequency it's in but changing coils to a larger one for deeper hunting tends to drain it quicker.
Happy hunting
regards Harry
Edited by nuggethill
01/15/2014 01:26 am
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New Member
United States
28 Posts |
Thanks for the tip! So basically the smaller the coil the more sensitive it is, up to a certain point.
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Pillar of the Community
Australia
1015 Posts |
Yes by far for smaller coils and as an example my mate uses a 5000 too but with a 8" coil (round mono we call the sweeper LOL mine's an 8" elliptical DD) very deadly on sub grammars or tiny bits anywhere on the goldfields,
Oh by the way the mono throe's a deep cone shape (like a coronet) and the DD throe's a knife edge (a signal the shape of a meat cleaver)just in case you didn't know
Edited by nuggethill
01/16/2014 12:50 am
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New Member
United States
28 Posts |
What I'll be trying to do is verify if the sensitivity changes due to the size/shape/frequency.
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Valued Member
United States
69 Posts |
a lot of good information here, ty
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Pillar of the Community
Australia
1015 Posts |
I find that sensitivity can change depending on ground magnetic,the more mineralized the ground the less you can have your sensitivity so it is or can be a fine balance
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Pillar of the Community
Australia
1015 Posts |
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Replies: 10 / Views: 3,751 |
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Posted 01/14/2014 04:26 am
