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Directory Topics Posts Last Post
General
Can't Register? Can't Log In? START HERE
Please read BEFORE contacting admins
Topics: 3 Posts: 3
Last Post: Other Issues
3 3
Carl-NC
by Carl-NC
Announcements
Read this first before posting
Topics: 2 Posts: 2
2 2
Inside the Metal Detector
ITMD1&2
Discussions concerning content, circuitry, source code, etc for the 1st & 2nd editions.
Topics: 59 Posts: 668
59 668
Carl-NC
by Carl-NC
ITMD3
Discussions concerning content, circuitry, source code, etc for the 3rd edition.
Topics: 19 Posts: 371
Last Post: Bipolar PI design
19 371
Carl-NC
by Carl-NC
Sub-Forums:
IB Designs (4/5)
PI designs (5/36)
Technology
Tech Forum
General tech discussions on all types of metal detectors: VLF, 2-box, BFO, off-resonance, PLL, etc. Questions, ideas, and anything else that moves you.
Topics: 5,509 Posts: 84,163
5,509 84,163
PI Technology
Tech discussions specific to Pulse Induction
Topics: 382 Posts: 22,973
382 22,973
Coils
Same as the Tech forum, but coil-specific.
Topics: 2,305 Posts: 24,559
Last Post: White's MX Sport
2,305 24,559
Repwoc
by Repwoc
Modifications
Detector mods, plus any other useful add-ons.
Topics: 755 Posts: 7,765
755 7,765
Carl-NC
by Carl-NC
Schematics
If you have a schematic to share, post it here. Please read the Intro post for rules on posting schematics.
Topics: 1,592 Posts: 30,341
1,592 30,341
General Detectors
A place to discuss the non-technical aspects of metal detectors. Your favorite detectors, favorite features, or favorite accessories.
Topics: 60 Posts: 1,259
60 1,259
Magnetometers
Tech discussions on mags.
Topics: 737 Posts: 4,136
Last Post: OKM
737 4,136
Carl-NC
OKM
by Carl-NC
Technical Books, Papers, and Literature
Technical books, papers, and literature related to treasure hunting technology. Any books written by Geotech members are made sticky at the top of the forum.
Topics: 12 Posts: 169
12 169
Side Scan Sonar
Tech discussions on sonar, transducers, and towfish construction.
Topics: 873 Posts: 3,293
Last Post: JW Fishers Pulse 12
873 3,293
Yury
by Yury
Geophysics
Other geophysics techniques, including earth resistivity, GPR, infrared, induced polarization, etc.
Topics: 374 Posts: 3,349
374 3,349
coinfarmer
Tools & Techniques
Vacuum forming, coil winding, packaging... anything mechanical.
Topics: 203 Posts: 2,112
Last Post: Old Coil Winder
203 2,112
pito
by pito
General Electronics
Cool circuits, tips, techniques, PCB methods, test equipment, etc.
Topics: 590 Posts: 5,861
Last Post: Helmholtz coils
590 5,861
ivconic
by ivconic
Programming
This is a special section dedicated to coding techniques, tips, tricks, methodology, programming various modules, MCUs, digital filters, etc. Basically, anything code-related.
Topics: 49 Posts: 447
49 447
HAFID25
by HAFID25
Projects
Project Competition
Got a something in mind you would like to see designed? Post it here and see who can come up with the best solution.
Topics: 10 Posts: 556
10 556
Completed Projects
Projects that have been reasonably completed
Sub-Forums:
Arduino Nano PI (9/949)
Baracuda PI (79/3,654)
Beachmaster PI (3/287)
Geotech Baracuda (53/872)
Hammerhead PI (412/3,525)
Hammerhead II PI (23/688)
Minipulse Plus (191/4,261)
SPI-MX 3b (16/164)
Stuart I & II PI (38/277)
Voodoo (4/1,769)
Active Projects
Projects that are currently being developed
Sub-Forums:
AMX Project (10/884)
Abandoned Projects
Project that were never completed but may still have good info
Sub-Forums:
GPR Project (38/506)
Kingfisher PI (2/56)
Surfmaster II (19/568)
Tinkerer's IB-PI (32/1,822)
USB Projects (10/1,887)
Misc
Buy-Sell-Trade
Detectors, parts, electronics, and so forth. No dealer restrictions.
Topics: 1,061 Posts: 5,618
1,061 5,618
Treasure Magazines & Books
Buy-Sell-Trade-Discussion specifically for treasure mags, books, & other publications.
Topics: 213 Posts: 456
213 456
Vintage & Collectable
Pics & info on vintage detectors, for those who like "the good ol' days" of digging everything.
Topics: 185 Posts: 1,014
185 1,014
Melbeta's Vintage Files
Unique vintage metal detector info donated by denizen 'Melbeta'.
Topics: 81 Posts: 564
81 564
Free Advertising
Those who have products & services they would like to advertise may do so here. Please read the Intro post.
Topics: 122 Posts: 135
122 135
Offsite Forums
Advanced Metal Detecting Research Lab
Italian website run by Leonardo Ciocca. Since 2009, a technical reference point. Objective and impartial to all lovers of the metal detector.
Topics: 0 Posts: 0
0 0
Topics: 0 Posts: 0
0 0
Eric Foster's PI Tech Forum
at Findmall.com
Topics: 0 Posts: 0
0 0
Pulsdetektor Forums
Tech forums dealing with the various Pulsdetektor projects. German only, Click Here for a BabelFish English translation.
Topics: 0 Posts: 0
0 0
Russian Metal Detecting forums
Lots of technical forums, but all in Russian. Click Here for a BabelFish English translation.
Topics: 0 Posts: 0
0 0
THunting.com
THunting.com is the former host for Geotech. These are general Treasure Hunting forums.
Topics: 1 Posts: 7
Last Post: End of an era
1 7
Tanu
by Tanu
LongRangeLocators.com
The world's largest forum dedicated to the discussion of LRLs and related devices.
Topics: 0 Posts: 0
0 0

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Latest Topics

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  • ivconic
    Bipolar PI design
    by ivconic
    It is very difficult to find anything in the book that is not very interesting.
    But I immediately decided on the Bipolar PI design as the first thing to focus on.
    There are several reasons for that.
    First, I like the idea of ​​a "non-invasive" detection method because
    ...
    01-07-2025, 08:56 AM
  • ivconic
    Pulse Star II (first analog version)
    by ivconic
    Promising promising!

    ...
    11-08-2019, 11:39 AM
  • Repwoc
    White's MX Sport
    by Repwoc
    I'm thinking of buying a DD coil described as 'Detech 13" coil for Whites Mx Sport'.

    Does anyone know if the White's MX Sport detector incorporates any electronics in the coil assembly, or does it use just a simple DD coil?

    Thanks
    paul
    Today, 10:45 AM
  • moodz
    GROUND BALANCE ( without the ground :-) )
    by moodz
    It would be great if detectors just didnt see the ground at all ... just turn them on and detect away.
    Here is a thought experiment.
    One way of looking at this mathematically : a detector is working by "solving" a set of simulateous equations.

    for example
    ...
    03-24-2025, 06:24 PM
  • Pep_T
    My design finally works!
    by Pep_T
    Hi everyone,

    I would like to share the progress I’ve made on my metal detector project so far. The analog front-end is largely the same as the VLF DISC design of the ITMD3, but there is a strong digital electronics component. The adaptation to the TX frequency, demodulator clock generation,...
    03-27-2025, 08:17 PM
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