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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: 696
61 696
Carl-NC
by Carl-NC
ITMD3
Discussions concerning content, circuitry, source code, etc for the 3rd edition.
Topics: 22 Posts: 604
22 604
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: 5,588 Posts: 85,983
Last Post: Minelab 8000
5,588 85,983
Aziz
by Aziz
PI Technology
Tech discussions specific to Pulse Induction
Topics: 432 Posts: 24,741
432 24,741
Coils
Same as the Tech forum, but coil-specific.
Topics: 2,340 Posts: 24,895
2,340 24,895
Modifications
Detector mods, plus any other useful add-ons.
Topics: 761 Posts: 7,833
761 7,833
Schematics
If you have a schematic to share, post it here. Please read the Intro post for rules on posting schematics.
Topics: 1,625 Posts: 30,795
1,625 30,795
Geotech11
General Detectors
A place to discuss the non-technical aspects of metal detectors. Your favorite detectors, favorite features, or favorite accessories.
Topics: 75 Posts: 1,377
Last Post: IB or VLF
75 1,377
Orbit
by Orbit
Magnetometers
Tech discussions on mags.
Topics: 746 Posts: 4,250
746 4,250
ivconic
by ivconic
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: 3,418
379 3,418
Tools & Techniques
Vacuum forming, coil winding, packaging... anything mechanical.
Topics: 207 Posts: 2,182
207 2,182
General Electronics
Cool circuits, tips, techniques, PCB methods, test equipment, etc.
Topics: 600 Posts: 5,934
Last Post: trash technology
600 5,934
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: 59 Posts: 522
Last Post: Telegram Attack!
59 522
EL NINO
by EL NINO
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: 740
12 740
Completed Projects
Projects that have been reasonably completed
Sub-Forums:
Arduino Nano PI (9/959)
Baracuda PI (81/3,782)
Beachmaster PI (3/287)
Geotech Baracuda (53/872)
Hammerhead PI (412/3,773)
Hammerhead II PI (24/710)
Minipulse Plus (192/4,262)
SPI-MX 3b (17/165)
Stuart I & II PI (38/277)
Voodoo (6/1,791)
Active Projects
Projects that are currently being developed
Sub-Forums:
AMX Project (11/917)
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: 1,086 Posts: 5,699
Last Post: DISCOVER X3
1,086 5,699
ivconic
by ivconic
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: 191 Posts: 1,046
191 1,046
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
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: 1 Posts: 2
Last Post: What can they do?
1 2
GeoMax
by GeoMax

What's Going On?

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There are currently 7251 users online. 73 members and 7178 guests.

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

Geotech Forums Statistics

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Topics: 17,866   Posts: 250,505   Members: 6,538   Active Members: 408
Welcome to our newest member, crysss75.

Latest Topics

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  • GeoMax
    Does anyone know anything about this old Pi detector circuit?
    by GeoMax
    Hello forum members,

    A long time ago, I got this old PI circuit diagram from somewhere. Unfortunately, the project documentation is incomplete. I have only this page. It looks like it's a PI detector from the 1980s/90s, photographed from an electronics magazine. Judging by the language,...
    Yesterday, 08:18 PM
  • JoyJo
    Shielding of TX and RX coils
    by JoyJo
    ​My colleague managed to find a non-working sensor from Manticore and disassemble it. The interesting points turned out to be: the coils TX and RH are wound with a litzendrate. The winding is done on a plastic frame. The graphite screen is applied only to the frame. Thus, there is a gap in the shielding...
    Yesterday, 12:51 PM
  • hykj0971
    GPZ7000 repail
    by hykj0971
    GPZ7000 repail...
    Yesterday, 10:09 AM

trending

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  • JoyJo
    Shielding of TX and RX coils
    by JoyJo
    ​My colleague managed to find a non-working sensor from Manticore and disassemble it. The interesting points turned out to be: the coils TX and RH are wound with a litzendrate. The winding is done on a plastic frame. The graphite screen is applied only to the frame. Thus, there is a gap in the shielding...
    Yesterday, 12:51 PM
  • GeoMax
    Does anyone know anything about this old Pi detector circuit?
    by GeoMax
    Hello forum members,

    A long time ago, I got this old PI circuit diagram from somewhere. Unfortunately, the project documentation is incomplete. I have only this page. It looks like it's a PI detector from the 1980s/90s, photographed from an electronics magazine. Judging by the language,...
    Yesterday, 08:18 PM
  • moodz
    Minelab 8000
    by moodz
    .....well it looks like the next big gold finding detector is here.

    https://www.minelab.com/gpz-8000

    If it doesnt find gold you can always use the coil as a dunny seat in the bush if you get caught short.
    02-26-2026, 10:36 PM
  • 55323352
    Looking for open-source deep PI metal detector schematic
    by 55323352
    Hello everyone,
    I am working on a DIY project to build a deep‑penetration pulse induction (PI) metal detector. I am looking for open‑source schematics, PCB layouts, and build plans for proven high‑depth designs.

    If you have links to open‑source projects, Gerber files,...
    04-21-2026, 03:21 AM
  • 55323352
    Topic: What brand of pulse metal detectors do you guys use?
    by 55323352
    Hello everyone, I'm from China. Currently the mainstream models in China are the 6103 and Golden Mask circuit boards. Their depth and stability are not very good, and they are not resistant to high-voltage power line interference! Could any experienced users help me out with a DIY circuit plan? I would...
    04-23-2026, 04:14 AM
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