Making an effective LRL (and gold detector)

I'm designing a Long Range Locator (LRL) that can also be used as a gold detector.

If you search Google for "LRL", the machines that help you find a target from a distance, you will get a few thousand results from pages where you can buy a device, but also videos showing these machines finding objects that are buried in the ground from a great distance.

What's better than taking a machine like that, go anywhere and it will show you if there's something buried somewhere nearby, right? These machines mainly focus on gold and silver, but some add diamonds or copper to emphasize that with one you can find almost anything and get rich super easy and even cheap.

The problem with these machines, however, is that while they may indeed find an object buried in the ground, they are unable to locate objects that have been buried for a long time.

And while the machines have a hard time locating targets that have been buried for many years as I said, they also have a weakness with certain rocks, since they can't dispose of them, thus putting their owners in trouble, since they're digging for free, wasting time and money. So a working machine, in my opinion, should locate targets that are chronically buried and not be stimulated by rocks, magnetic fields, etc.

The manufacturers or sellers of such machines, have found the golden eggs. By making fancy machines, putting antennas or even cameras on them, they try to lure the most difficult to believe, but in essence all these machines are more or less the same, just like the 3D black eagle metal detector you see right now.

See for example another machine, which by looking at it shows that it can do great things, that it is actually a scam, since the plugs are not connected to anything as you can see in the video below.

Most if not all of these machines, have the same way of working. That is, a simple chip, the 555 usually or a signal generator like this one and an antenna. So simple. I've seen LRLs that have cheap boards from China, a battery and a module to charge the battery.

The majority of LRLs claim to use the principle of frequency resonance, whereby the devices emit electromagnetic signals through an antenna that respond to a metal object such as silver or gold and then the device will indicate its position on the ground.

This principle as applied to devices, and according to many sceptics, has no basis in science and therefore cannot work in a real situation.

The manufacturers of these machines stress that they can detect objects buried several meters and from a great distance, but this is not the case because they simply cannot produce such a high-powered signal.

At some point I decided to study their function and to build a machine that was as functional as possible, that is to say that it could find targets and not be affected by rocks and magnetic fields. As you will see in this picture, I made many tests and had countless failures, but finally I managed to build 2 machines that I will show you and how they work.

Note that the machines I built are in test boxes so they have a lot of cutting on them. When I come up with the hardware, I will print a better box or buy another one that fits. I also added a black color on them because I don't want my desing to be copied.

So the one that I built, it's the one you see in the picture below, is a machine that can do a lot. That is, it produces and transmits frequencies to many commercial LRLs, it will work like a radar, that is, it will read the signals seen by the LRL, it will also be a metal detector with a disk and also a magnetometer.

The 2nd machine you can see in the picture below. My original goal was to also be able to see the target, something like a radar, but so far I don't have the results I want, but it's doing very well as a LRL.

Anyway, I'm still testing them. I have a video where I test them against a commercial LRL (an AKS LRL) and you can see the results. The video is in Greek (with English subtitles). When I finish them, I will post another article with the final system and its results.