Let’s co-build a modern IDX Pro: STM32F411 core + ESP32 UI - hardware collaborators wanted

[luci]

For anyone interested in building the standard IDX Pro (without the 2-tone module), I will also upload the working PCB layout and the Gerber files for my version.
This PCB has been fully tested and works correctly on my build, so it might be useful for others who want to make this detector.

I’ll attach the schematic, the PCB layout, and the Gerbers

[GeoMax]

Thank you for uploading the files.

[AhmatAhmatov1959]

Hello luci. What's the detector's reaction to gold? Is it possible to search for gold nuggets? Do you know how to program? I built a MAGPI V3 detector. This detector is very sensitive, detecting a gold plate measuring 3x6x0.3 mm at a distance of 3 cm. It also detects soil and, I think, airplanes in the sky. Maybe you might be interested in it?

[pechkata]

Hello luci. What's the detector's reaction to gold? Is it possible to search for gold nuggets? Do you know how to program? I built a MAGPI V3 detector. This detector is very sensitive, detecting a gold plate measuring 3x6x0.3 mm at a distance of 3 cm. It also detects soil and, I think, airplanes in the sky. Maybe you might be interested in it?

[Hamza Dz]

Good job Bro

[Hamza Dz]

Where is 12 u2

[luci]

Hello everyone,

Some time ago I started this thread looking for collaborators to build a modern IDX Pro metal detector based on an STM32F411 and an ESP32.

I wanted to share a quick update: the hardware is now fully working and has been successfully tested. The detector communicates via Bluetooth with a custom Android application, which displays real-time discrimination signatures for different targets.

The Android application is still under active development, but the project has reached an exciting stage and I'm very happy with the results so far.

In this short video you can see tests on rusty iron, copper, silver, gold and bronze, together with the live discrimination radar displayed by the Android app.

Video:
https://www.youtube.com/shorts/V7voE5hFPjk
https://www.tiktok.com/@prodetector/...69393825041686

As always, comments, ideas and technical feedback are welcome.

[luci]

Here is a photo showing both hardware revisions of the detector: the original THT prototype and the latest compact SMD version.

The current hardware is based on an ESP32 microcontroller and uses an MCP3202 12-bit ADC for signal acquisition. The electronics are now fully tested and working reliably, while the Android application is still under active development.

Thanks again for your interest and support!

[luci]

This is the circuit

[Carl-NC]

Nicely done! Next time you do a video, also show the response to ferrite. This helps provide a reference for all the other responses.

[ivconic]

Drop a steamer , run and let others enjoy the odors!

[moodz]

Drop a steamer , run and let others enjoy the odors!

Very subtle.....

[ivconic]

[luci]

Relax, no 'odor' here—just actual progress. Some of us spend time modernizing both hardware and software from scratch instead of just building old designs or chatting on forums all day.

The hardware is completely ready, including both a standard schematic and a compact SMD version—where I’m using a DG412 instead of the traditional CD4066. The Android app is currently in development. Since this is an advanced DIY project, I’m working on a feature in the app settings that allows users to properly set coil overlap/nulling directly from the phone.

Keep in mind, this is purely a passion project for me. I currently own three metal detectors and regularly hunt with a Nokta Simplex Ultra, so I enjoy testing and comparing performance against commercial units.

Real innovation takes time, but I'll keep you posted on the progress.

[ivconic]

I simply can't resist!
I see that few have understood my "sublime thought" expressed in the previous post.
Literalists understood it this way: