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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: 61 Posts: 697
61 697
dbanner
by dbanner
ITMD3
Discussions concerning content, circuitry, source code, etc for the 3rd edition.
Topics: 23 Posts: 622
Last Post: ITMD4
23 622
ivconic
by ivconic
Sub-Forums:
IB Designs (4/5)
PI designs (5/66)
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: 5,603 Posts: 86,557
Last Post: Coil resistance
5,603 86,557
pito
by pito
PI Technology
Tech discussions specific to Pulse Induction
Topics: 459 Posts: 25,338
Last Post: TL12000
459 25,338
GeoMax
by GeoMax
Coils
Same as the Tech forum, but coil-specific.
Topics: 2,355 Posts: 24,955
2,355 24,955
Op04
by Op04
Modifications
Detector mods, plus any other useful add-ons.
Topics: 761 Posts: 7,839
761 7,839
Schematics
If you have a schematic to share, post it here. Please read the Intro post for rules on posting schematics.
Topics: 1,637 Posts: 31,374
Last Post: Superscan PI
1,637 31,374
ZOUjiarui
General Detectors
A place to discuss the non-technical aspects of metal detectors. Your favorite detectors, favorite features, or favorite accessories.
Topics: 82 Posts: 1,410
82 1,410
Magnetometers
Tech discussions on mags.
Topics: 751 Posts: 4,264
Last Post: trimpot adjustment
751 4,264
GeoMax
by GeoMax
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: 15 Posts: 180
15 180
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: 379 Posts: 3,424
379 3,424
Tools & Techniques
Vacuum forming, coil winding, packaging... anything mechanical.
Topics: 208 Posts: 2,237
208 2,237
General Electronics
Cool circuits, tips, techniques, PCB methods, test equipment, etc.
Topics: 603 Posts: 5,958
603 5,958
Skippy
by Skippy
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: 60 Posts: 523
60 523
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: 12 Posts: 842
12 842
Completed Projects
Projects that have been reasonably completed
Sub-Forums:
Arduino Nano PI (9/959)
Baracuda PI (81/3,783)
Beachmaster PI (3/287)
Geotech Baracuda (53/872)
Hammerhead PI (413/3,775)
Hammerhead II PI (24/723)
Minipulse Plus (192/4,262)
SPI-MX 3b (17/165)
Stuart I & II PI (38/277)
Voodoo (6/1,792)
Active Projects
Projects that are currently being developed
Sub-Forums:
AMX Project (11/917)
Spectral G4 (1/51)
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: 1,094 Posts: 5,721
1,094 5,721
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: 192 Posts: 1,047
192 1,047
Melbeta's Vintage Files
Unique vintage metal detector info donated by denizen 'Melbeta'.
Topics: 91 Posts: 606
91 606
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
Forum Issues & Feedback
Problems with the forums? Suggestions for improvements? Post them here.
Topics: 4 Posts: 32
4 32
Kemper
by Kemper
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
Eric Foster's PI Tech Forum
at Findmall.com
Topics: 0 Posts: 0
0 0
Russian Metal Detecting forums
Lots of technical forums, but all in Russian.
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: 1 Posts: 2
Last Post: What can they do?
1 2
GeoMax
by GeoMax

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Most users ever online was 87,796 at 08:10 AM on 03-19-2026.

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Welcome to our newest member, Simone.

Latest Topics

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  • rospy
    Superscan PI
    by rospy
    The circuits



    The Detector

    ...
    04-26-2009, 04:41 PM
  • Detectorist#1
    Bipolar PI MD with GB and DD Coil
    by Detectorist#1
    I propose bipolar PI MD design with GB and ready manufactured DD coil (15" x 12" SEF coil from DETECH company). This project is based on bipolar MD with GB from ITMD3 book, but have more aggressive timings with hope to be useful for smaller nuggets....
    04-16-2025, 03:28 PM
  • cristiano.sar
    Eric Foster coil cable
    by cristiano.sar
    Someone knows where to purchase this kind of orange cable that Eric Foster used in his coils? Thanks.

    ​​ ...
    08-16-2026, 01:55 AM
  • Sergey_P
    Coil resistance
    by Sergey_P
    The electromagnetic characteristic that distinguishes one substance from another is phase. If the phase of the detector's receiver impedance is indistinguishable from the phase of the surrounding soil impedance, they have no effect on each other. To reduce phase noise in the detector's receiver when...
    08-03-2026, 04:17 AM
  • eduardo1979
    IDX-PRO+VDI
    by eduardo1979
    Hello. I found this Russian forum of IDX-PRO PCB. The PCB had many mistakes and failures of some components. I corrected the PCB and added the missing components. I wish that we all take a look and give a chance on this project. Surely here in the forum there are people who would be interested in this...
    08-21-2011, 11:40 AM
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