How to make a metal detector at home from improvised means?

The smell of wanderings, the fragrance of adventure or the prosaic disposal of your country plot from various metal debris can suggest the acquisition of a special device. Professional metal detectors, reviews of which are well known, are quite expensive. But they meet all the requirements of these professional diggers. It is necessary 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 examining private land for soil purification, metal detectors are used in various areas:

• To detect underground communications of cables and pipelines;
• For assistance in archaeological excavations;
• For engineering and construction work and forensics;
• In the sapper troops.

Sports Treasure

One of the types of active hobby - sports treasure hunt - is gaining popularity among enterprising and enthusiastic people. What is interesting in this matter?

• The element of uncertainty is always fascinating. How to make a metal detector at home? What lies beneath the surface of the earth? Until you get it and you do not try it - you do not.
• Whose apparatus is deeper "peeking" under the ground? Who better to determine the quality of the metal trinkets that have lain for many years in the unknown?
• And if this piece of iron also has value - this is the limit of exultation of the inventor, who independently came up with 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 the work of metal detectors?

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 the metal object come together in the generator, the frequency changes, which the device reports with an audible signal. If a squeak is heard in the headphones, then something metallic is lying under the ground.

Modern inventors are working on two tasks:

• Increase in the search depth;
• Improvement of identification parameters of devices;
• Reduction of energy costs;
• Convenient operating characteristics.

What do you need to stock up for the detector?

How to make a metal detector at home? It is worth to get acquainted with electronics and read physics for the 7th grade of secondary school. It will be useful to work with some tools and improvised tools. It is necessary to study and test a number of electrical circuits in order to choose the one that will really work. Materials that you need when working:

• A small generator (from an old tape recorder);
• Quartz resonator ;
• Film capacitors and resistors;
• Vinyl or wooden ring for search coil;
• Plastic, bamboo or wooden cane - holder;
• Aluminium Foil;
• Wires for coil winding;
• Piezoelectric radiator;
• Metal box - screen;
• Headphones for receiving an audio signal from the device;
• Two identical transformer coils;
• 2 "Crohn" batteries;
• Perseverance and patience.

Sequence assembly of the search metal detector

From a plywood circle with a diameter of 15 cm, a search coil is made: the wire is wound on the template by turns (15-20). The peeled ends are soldered to the connecting cable. On the perimeter of the coil, a string of threads is wound over the wire for fastening.

All the details of the circuit are soldered on the printed circuit board from the textolite in the following order: capacitors, a system of resistors, a quartz filter, a signal amplifier, a transistor, diodes, a search generator. In the prepared housing, a soldered board is put in, connected to the search coil and fixed to a stick-holder.

The signal from the search coil, reflected by a metal object, increases the frequency of the generator. Reinforced with a quartz filter, it is converted by an amplitude detector into a constant pulse, which produces sound.

How to dig up asphalt and go unprotected?

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 fact can strongly influence the effectiveness of the search. Metal detectors "AKA", in which the creators mathematically calculated and minimized the influence of the Earth's electromagnetic field, process the entire wave stream. In addition, the signal reflected from the object is sent to the monitor of the device. The device shows a certain image, by which you can determine what kind of piece of iron lies under the layer of soil:

• Or it's a bunch of coins;
• Maybe this is an ancient nail;
• Mine or a fragment of a high-explosive projectile ;
• Helmet or sapper blade ;
• Single metal thing.

Smart detector reports the depth of the object. The patented technology of averaged visualization of search objects allows to decide whether it is worth digging in a given place. The device has a convenient design and is easily prepared for work.

The most enthusiastic treasure hunters inventors like to do everything themselves. Some even complicate the process and come up with how to make a simple metal detector at home. And it does not matter that he can only find the old button at a depth of 5-6 cm from the surface. But how much pride the creator gets from the process!

Have all the treasures been dug up?

Ancient manuscripts and maps with legendary treasures attract not only greedy seekers to the treasure. Historians, researchers and archaeologists have been searching for years for taking Napoleon from Moscow. And the wealth stolen by Stenka Razin? Where do they lie, who are they waiting for? Have you already found pirate storerooms on the islands of the Caribbean Sea?

From some sources it is known that the Ataman prey is quietly waiting for the lucky ones on one of the islets of the Caspian Sea. And the gold, taken out by Napoleon, turns out to be repulsed and hidden by the Cossacks. And drove the French to Paris. And only one came back, and even then he could not recognize the terrain. And while he waited for the winter, he fell ill and died. Since that time, there was a leaflet in one of the archives with a plan showing the signs of all the chests and ten barrels of gold.

Russia is not Europe, and there were no banks in the old days. Wherever they could, they hid wealth from ruffians and robbers. So, let not such a big find find, but less, still nice. How to make a metal detector at home? If you really want, you just need to try.

As a favorite character said in one famous film, let's look!