Aziz and myself have collaborated to bring you SPULE32 which is Aziz's coil modelling software.
He has kindly provided the original source code ( C, C++, ASM ) which originally was built for windows and I ( with AI help ) have ported to Javascript.
So to be clear Aziz did all the work and...
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ITMD1&2
Discussions concerning content, circuitry, source code, etc for the 1st & 2nd editions.
Topics: 61
Posts: 697
Last Post:
Probe PCB from Silverdog
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ITMD3
Discussions concerning content, circuitry, source code, etc for the 3rd edition.
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Last Post:
Bipolar PI design
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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.
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Last Post:
Need code help
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PI Technology
Tech discussions specific to Pulse Induction
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Bipolar PI MD with GB and DD Coil
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Coils
Same as the Tech forum, but coil-specific.
Topics: 2,360
Posts: 25,009
Last Post:
SPULE32 Coil modelling software by AZIZ
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Detector mods, plus any other useful add-ons.
Topics: 764
Posts: 7,849
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Schematics
If you have a schematic to share, post it here. Please read the Intro post for rules on posting schematics.
Topics: 1,640
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Last Post:
Full m/lab SD2000 schematics
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General Detectors
A place to discuss the non-technical aspects of metal detectors. Your favorite detectors, favorite features, or favorite accessories.
Topics: 83
Posts: 1,412
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Magnetometers
Tech discussions on mags.
Topics: 751
Posts: 4,265
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by etznab
09-08-2026, 11:52 PM
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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
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Side Scan Sonar
Tech discussions on sonar, transducers, and towfish construction.
Topics: 873
Posts: 3,293
Last Post:
JW Fishers Pulse 12
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Geophysics
Other geophysics techniques, including earth resistivity, GPR, infrared, induced polarization, etc.
Topics: 381
Posts: 3,459
Last Post:
Adding an SD Card data logger to EPE logger
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Tools & Techniques
Vacuum forming, coil winding, packaging... anything mechanical.
Topics: 209
Posts: 2,303
Last Post:
AI can't invent. AI isn't creative.
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General Electronics
Cool circuits, tips, techniques, PCB methods, test equipment, etc.
Topics: 604
Posts: 5,960
Last Post:
ENOB
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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: 61
Posts: 532
Last Post:
No clue about the title here!
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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
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by ivconic
08-11-2026, 02:51 PM
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Completed Projects
Projects that have been reasonably completed
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Project that were never completed but may still have good info
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Buy-Sell-Trade
Detectors, parts, electronics, and so forth. No dealer restrictions.
Topics: 1,094
Posts: 5,721
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Treasure Magazines & Books
Buy-Sell-Trade-Discussion specifically for treasure mags, books, & other publications.
Topics: 213
Posts: 456
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Vintage & Collectable
Pics & info on vintage detectors, for those who like "the good ol' days" of digging everything.
Topics: 192
Posts: 1,048
Last Post:
The Compass Forum has a new web address
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Melbeta's Vintage Files
Unique vintage metal detector info donated by denizen 'Melbeta'.
Topics: 91
Posts: 606
Last Post:
Discrimination just does not work!!
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Free Advertising
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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.
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Eric Foster's PI Tech Forum
at Findmall.com
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Russian Metal Detecting forums
Lots of technical forums, but all in Russian.
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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
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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?
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There are currently 54261 users online. 81 members and 54180 guests.
Most users ever online was 255,203 at 05:34 PM on 10-02-2026.
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10-29-2026, 10:29 PM
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I have built a device equipped with an antenna. I used an Arduino, a control screen, and a single button. I also added external components: an LM386 amplifier IC, a BD139 transistor, and a 10k variable resistor, along with ceramic and disc capacitors. The setup relies on a ground connection (negative/earth)...10-26-2026, 04:01 PM
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I want to order some extra battery connectors that are used in the TDI, and connects to the Li-ion battery. Does anyone know the official part number, and manufacturer? Like Amphenol PC-1922993 (random junk as an example), or a Mouser P/N#?
I've tried all of the plug-in-the-wall power...10-23-2026, 08:39 PM
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I wanted a tool so I could look closely at the frontend of metal detector design. It turns out I had it on the bench right in front of me.
1. An FPGA board
2. A 24 bit ADC board.
BONUS .... No Soldering at all.
The hardware is about the same cost as a good...10-21-2026, 12:45 PM -
Aziz and myself have collaborated to bring you SPULE32 which is Aziz's coil modelling software.
He has kindly provided the original source code ( C, C++, ASM ) which originally was built for windows and I ( with AI help ) have ported to Javascript.
So to be clear Aziz did all the work and...10-29-2026, 10:29 PM -
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
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Remember this one?
Although obsolete and forgoten this one continue to be "most wanted"
among low budget detectors here in Serbia. Few amateurs are still
building this and selling at various prices. From 200e up to 400e!!!!
One of local frauds is advertising...08-23-2007, 10:56 PM -
Hi all,
we are really far from AGI (Artificial General Intelligence).
https://en.wikipedia.org/wiki/Artifi...l_intelligence
I have invented a most powerful drawing transfer method (for fine arts) a couple of years ago and it isn't published yet.
So all the...04-20-2026, 11:14 AM