How to make a metal detector yourself?

A metal detector is usually associated withtreasure hunters who carefully analyze each piece of soil. They peer with the help of the magnetic field, which creates the device, deep under the ground. In addition to finding treasures, such a device can be used as an assistant when you lose your car keys on a picnic or any other metal object. How to make a metal detector with good sensitivity, which will react even to the smallest metal product? In any case, such a device can be useful to you on a trip, and perhaps, it will really help to find a treasure.

On how to make a metal detector, it is writtenmany articles. Let's dwell on the most reliable and time-tested scheme, which begins to work immediately after its implementation. For any metal detector it is necessary to create a magnetic field, which will test a small area. The radius of this area depends on the sensitivity of the device and the intensity of the magnetic field. Since we collect a simple device, the radius will be small.

As a source of magnetic field, we canUse a working calculator or any other household appliance. Surely you paid attention to the characteristic interference when receiving radio broadcasts, for example, when a mobile phone is operating? Correctly, the receiver in our scheme will be an ordinary radio tuner tuned to the frequency of the working calculator.

It's easy to configure it, set it nearincluded calculator and radio. Now switch it to the AM range and find the wave on which the characteristic crackle will be heard. Turn the calculator off and on to make sure that you have found the interference the working calculator creates. The setup is finished, now you know how to make a metal detector. It is possible to start practical testing of the device.

Bring a metal object to the device. Once it enters the magnetic field created by the working calculator, the sound in the radio will change. By approaching and removing the metal, you can determine the radius of action of such a device. Usually it does not exceed thirty centimeters. This is quite enough to find the lost object.

Probably, in due course, you will want to learn how to make a metal detector more sensitive. To implement this idea, you will need a set of radio components and

skills in the manufacture of radio circuits. A homemade metal detector on microcircuits works according to the above principle, only the magnetic field created by the emitter is much more powerful. This directly affects the range of the device.

As you can see, metal detectors collect their own handsit is quite real, most important, to know the principle by which it works. The increase in the power of the radiator and the tuning of the receiver to its frequency are the main tasks that stand in the manufacture of a device of higher power and better sensitivity. It should also be borne in mind that if the circuit of the metal detector becomes more complicated, special devices may be needed to adjust it.