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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: 5,596 Posts: 86,361
5,596 86,361
PI Technology
Tech discussions specific to Pulse Induction
Topics: 451 Posts: 25,088
451 25,088
Coils
Same as the Tech forum, but coil-specific.
Topics: 2,347 Posts: 24,915
Last Post: Coil Calculator 2
2,347 24,915
pito
by pito
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: 1,634 Posts: 31,214
1,634 31,214
General Detectors
A place to discuss the non-technical aspects of metal detectors. Your favorite detectors, favorite features, or favorite accessories.
Topics: 79 Posts: 1,405
79 1,405
the79element
Magnetometers
Tech discussions on mags.
Topics: 750 Posts: 4,260
750 4,260
Pejo pro
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: 3,420
379 3,420
Tools & Techniques
Vacuum forming, coil winding, packaging... anything mechanical.
Topics: 207 Posts: 2,230
207 2,230
General Electronics
Cool circuits, tips, techniques, PCB methods, test equipment, etc.
Topics: 602 Posts: 5,950
Last Post: Weller
602 5,950
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: 830
12 830
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 (413/3,775)
Hammerhead II PI (24/710)
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)
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: 1,088 Posts: 5,712
1,088 5,712
Altra
by Altra
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 14633 users online. 77 members and 14556 guests.

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

Geotech Forums Statistics

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Topics: 17,923   Posts: 251,948   Members: 6,640   Active Members: 456
Welcome to our newest member, Kamitokazi.

Latest Topics

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  • GeoMax
    Whites Beach Hunter ID 300
    by GeoMax
    Hi Forums

    Does anyone have a circuit diagram for the White's Beach Hunter ID 300? Or what circuit is it based on? Any information is welcome. Thanks...
    Yesterday, 09:12 AM
  • ozgold
    Testing the New GPZ 8000 with all 3 coils v the GPX 5000 V the GPX 6000.
    by ozgold
    Hello members. A big Hi from Australia.

    A very good friend of mine has asked me to upload this test sheet results. They are details of a comparison test that he has recently carried out.

    After waiting for the other 8000 M/Lab coils to surface. This is an eye-opener for me...
    06-29-2026, 02:15 AM
  • dekamon
    DELTA PULSE STM32F103
    by dekamon
    PI Metal Detector Firmware Specification
    (STM32F103C8T6 "Blue Pill" + STM32CubeIDE / HAL)

    This document defines the hardware map and required functionality for a
    working reference firmware. Goal: transfer the TIMING role of a classic
    Delta Pulse analog circuit...
    06-27-2026, 04:44 PM

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