The smell of wandering, the smell of adventure or the prosaic disposal of your summer cottage from various metal debris may suggest purchasing a special device. Professional metal detectors, reviews of which are known to everyone, are quite expensive. But they meet all the requirements of real professional diggers. You need to choose the best metal detectors. Reviews will help to understand this difficult matter. And you can make this device yourself.
Where are metal detectors used?
In addition to searching for real treasures and surveying private land for soil cleansing, metal detectors are used in various areas:
- to detect underground communications of cables and pipelines;
- for help in archaeological excavations;
- in civil engineering and forensics;
- in sapper troops.
Sports treasure hunting
One of the types of active hobby - sports treasure hunting - is gaining more and more popularity among enterprising and enthusiastic people. What's interesting inthis case?
- The element of suspense is always fascinating. How to make a metal detector at home? What lies below the surface of the earth? You won't know until you get it and try it.
- Whose apparatus will "look" deeper under the ground? Who better to determine the quality of a metal trinket that has lain in obscurity for many years?
- And if this piece of iron also has value - this is the limit of the jubilation of the inventor, who independently figured out how to make a metal detector at home from improvised means.
- At rallies and competitions, of course, coins are buried specifically to determine the capabilities of homemade and factory detectors.
What is the principle of operation of metal detectors based on?
Any metal detectors work on the basis of the principles of the "Foucault currents" known from the school curriculum. We will not go into the details of the experiments. When the search coil and a metal object approach each other, the frequency changes in the generator, which the device reports with an audible signal. If a squeak is heard in the headphones, then something metallic lies underground.
Modern inventors are working on two tasks:
- increase search depth;
- improvement of device identification parameters;
- reduce energy costs;
- comfortable performance.
What do you need to stock up to make a detector?
How to make a metal detector at home? It is worth getting a little acquainted with electronics and reading physics for the 7th grade of high school. Experience with some tools and improvised means will be useful. It is necessary to study and test a number of electrical circuits in order to choose one that will really work. Materials you will need for work:
- small generator (from an old tape recorder);
- quartz resonator;
- film capacitors and resistors;
- vinyl or wooden searchcoil ring;
- plastic, bamboo or wooden cane holder;
- aluminum foil;
- wires for coil winding;
- piezoelectric transducer;
- metal box - screen;
- headphones for receiving a sound signal from the device;
- two identical transformer coils;
- 2 Krona batteries;
- perseverance and patience.
Search metal detector assembly sequence
A search coil is made from a plywood circle with a diameter of 15 cm: the wire is wound in turns (15-20) on a template. The stripped ends are soldered to the connecting cable. Around the perimeter of the coil, a layer of thread is wound over the wire to secure it.
All parts of the circuit are soldered on a printed circuit board made of textolite in the following order: capacitors, resistor system, quartz filter, signal amplifier, transistor, diodes, search generator. A soldered board is inserted into the prepared case, connected tosearch coil and mounted on a stick-holder.
The signal from the search coil, reflected by a metal object, increases the frequency of the generator. Amplified by a quartz filter, it is converted by an amplitude detector into a constant pulse that produces sound.
How to dig up the asph alt and go off the beaten path?
Not all those who are wondering how to make a metal detector at home think about the fact that the earth is an electrical conductor. However, this very fact can greatly affect the search performance. "AKA" metal detectors, in which the creators mathematically calculated and minimized the influence of the Earth's electromagnetic field, process the entire flow of waves. In addition, the signal reflected from the object is sent to the device's monitor. The device shows a certain image by which you can determine what kind of piece of iron lies under a layer of soil:
- or is it a pile of coins;
- maybe it's an ancient nail;
- mine or high-explosive fragment;
- helmet or sapper shovel;
- a single piece of metal.
Smart detector reports the depth of the object. The patented technology of average visualization of search objects allows you to decide whether to dig in a given place. The device has a convenient design and is easy to prepare for use.
The most passionate inventors in treasure hunting love to do everything themselves. Some even complicate the process for themselves and figure out how to make a simple metal detector at home.conditions. And it doesn't matter that he can only find an old button at a depth of 5-6 cm from the surface. But how much pride the creator gets from the process itself!
Have all the treasures been dug up yet?
Old manuscripts and maps with legendary treasures captivate not only treasure-hungry seekers. Historians, researchers and archaeologists have been searching for years for what Napoleon took from Moscow. And what about the riches stolen by Stenka Razin? Where are they, who are they waiting for? Have they already found pirate hoards in the Caribbean?
From some sources it is known that Ataman prey is quietly waiting for the lucky ones on one of the islands of the Caspian Sea. And the gold taken out by Napoleon, it turns out, was recaptured and hidden by the Cossacks. And they drove the French to Paris. And only one returned, and even then he could not recognize the area. And while he was waiting for winter, he fell ill and died. Since that time, a sheet with a plan has remained in one of the archives, on which the designations of all the chests and ten barrels of gold are applied.
Russia is not Europe, and there were no banks in the old days. Where they could, they hid we alth from spiteful critics and robbers. So, let not such a big find come across, but a smaller one, it's still nice. How to make a metal detector at home? If you really want to, you just need to try.
As our favorite character said in a famous movie, let's look for it!
