Depth metal detector with their own hands: a diagram, instructions and feedback

Metal detectors of the deep type are able to detect objects in the ground at a great distance. Modern modifications in stores are quite expensive. However, in this case, you can try to make a metal detector yourself. For this purpose, it is recommended first of all to familiarize yourself with the design of the standard modification.

Modification scheme

By assembling the metal detector yourself (the diagram is shown below), it should be remembered that the main elements of the device are a damper on the microcontroller, a capacitor and a handle with a holder. The control unit in the devices consists of a set of resistors. Some modifications are made on drive modulators, which operate at a frequency of 35 Hz. Straight racks are made with narrow and wide plate-shaped plates.

Instructions for assembling a simple model

It is quite easy to assemble a metal detector with one's own hands. First of all it is recommended to prepare a tube and attach a pen to it. To install the control unit, high conductivity resistors are required. The operating frequency of the device depends on many factors. If we consider modifications on diode capacitors, then they have high sensitivity.

The operating frequency of such metal detectors is about 30 Hz. The maximum detection distance of the object is 25 mm. Modifications are possible on lithium-type batteries. Microcontrollers for assembly will be required with a polar filter. Many models are stacked on open type sensors. It is also worth noting that experts do not recommend using high sensitivity filters. They greatly reduce the accuracy of detecting metal objects.

The model of the series "Pirate"

Make a metal detector "Pirate" with their own hands can only be based on a wired controller. However, first of all, the microprocessor is harvested for assembling. To connect it you need a blowtorch. Many experts recommend the use of grid capacitors with a capacity of 5 pF. Conductivity should be maintained at 45 microns. After installing the capacitors, you can proceed to solder the control unit. The rack should be strong and withstand the weight of the plate. For 4 V models, it is not recommended to use plates with a diameter of more than 5.5 cm. System indicators do not have to be installed. After fixing the unit, it will only be necessary to install the batteries.

The use of reflex transistors

Make metal detectors with reflex transistors with their own hands is quite simple. First of all, experts recommend to install the microcontroller. Condensers in this case will fit a three-channel type, and their conductivity should not exceed 55 microns. At a voltage of 5 V, they have a resistance of approximately 35 ohms. Resistors for modifications are mainly of the contact type. They have a negative polarity and can cope well with electromagnetic oscillations. It is also worth noting that lithium batteries are allowed for assembly . The maximum width of the plate for this modification is 5.5 cm.

Model with convection transistors: expert reviews

The metal detector can be assembled by hand only on the basis of a collector controller. In this case, capacitors are used at 30 microns. If you believe the reviews of experts, it is better not to use powerful resistors. In this case, the maximum capacity of the elements should be 40 pF. After installing the controller, it is worthwhile to do the control unit.

These metal detectors receive good reviews for reliable protection against wave interference. For this purpose, two diode filters are used. Modifications with indicator systems are very rare among self-made modifications. It is also worth noting that power supplies must operate at low voltage. Thus, the battery will last a long time.

Using chromatic resistors

How to make a metal detector with your own hands? The model with chromatic resistors is quite easy to assemble, but it should be taken into account that the capacitors for modifications can only be used on fuses. Also experts point out the incompatibility of resistors with pass filters. Before starting the assembly, it is important to immediately prepare a tube for the model, which will be a handle. Then the unit is installed. It is more expedient to select modifications to 4 microns, which operate at a frequency of 50 Hz. They have a small coefficient of dissipation and high accuracy of measurement. It is also worth noting that the searchers of this class will be able to work successfully in conditions of high humidity.

Model with a pulsed zener diode: assembly, reviews

Devices with pulsed zener diodes are distinguished by high conductivity. If you believe the feedback of experts, self-made modifications are able to work with objects of different sizes. If we talk about parameters, then the detection accuracy of them is about 89%. Start the assembly of the device from the stand of the rack. Then the handle for the model is mounted.

The next step is to install the control unit. Then the controller is mounted, which is powered by lithium batteries. After the unit is installed, it is possible to solder condensers. The negative resistance at them should not exceed 45 Ohm. Experts' comments indicate that modifications of this type can be made without filters. However, it should be taken into account that the model will have serious problems with wave interference. In this case, the capacitor will suffer. As a result, the battery of this type of model is quickly discharged.

Using a low-frequency transceiver

Low-frequency transceivers in models significantly reduce the accuracy of the devices. However, it should be noted that modifications of this type are able to successfully work with objects of small size. In this case, they have a small self-discharge parameter. In order to assemble the modification yourself, it is recommended to use a wired controller. The transmitter is most often used on diodes. Thus, the conductivity is ensured at a level of 45 microns at a sensitivity of 3 mV.

Some experts recommend installing grid filters that increase the security of models. To raise the conductivity, only transient type modules are used. The main disadvantages of such devices is the burnout of the controller. With such a breakdown, it is problematic to repair the metal detector yourself.

Using a high-frequency transceiver

On high-frequency transceivers to collect a simple metal detector with their own hands can only be based on the transitional controller. Before starting the installation, the rack under the plate is prepared as standard. Conductivity of the controller is on average 40 μ. Many experts do not use contact filters during assembly. They have high heat losses, and they work at 50 Hz. Also worth noting that for the assembly of a metal detector lithium batteries are used, which recharge the control unit. Directly the sensor of the modifications is installed through a capacitor, whose capacitance should not exceed 4 pF.

Model with longitudinal cavity

On the market there are often devices with longitudinal resonators. They stand out among their competitors with high accuracy in the definition of objects, and at the same time they can work at high humidity. In order to independently assemble the model, the rack is prepared, and the plate should be used with a diameter of at least 300 mm.

Also worth noting that to build the device you need a contact controller, and one expander. Filters are used only on a grid lining. Many experts recommend installing diode capacitors, which operate at a voltage of 14 V. First of all, they discharge the battery a little. It is also worth noting that they have good conductivity in comparison with field analogues.

Using selective filters

It is not easy to make such a deep metal detector by oneself. The main problem is that you can not install a conventional capacitor in the device. It is also worth noting that the plate for modification is selected with a size of 25 cm. In some cases, the racks are installed with an expander. Many experts advise starting the assembly with the installation of the control unit. It must operate at a frequency of not more than 50 Hz. In this case, the conductivity depends on the controller, which is used in the equipment.

Quite often it is selected with an overlay to enhance the security of the modification. However, such models often overheat, and are not able to work with high accuracy. To solve this problem, it is recommended to use conventional adapters, which are installed under the capacitor blocks. The coil for the metal detector is made from the transceiver block.

Contactor applications

Contactors in devices are installed together with control units. Racks for modifications are used for small lengths, and plates are selected for 20 and 30 cm. Some experts say that the device should be assembled on impulse adapters. In this case, capacitors can be used with low capacitance.

It is also worth noting that after installing the control unit it is necessary to solder a filter that is capable of operating at a voltage of 15 V. In this case, the model will maintain conductivity at the level of 13 microns. Transceivers are most often used on adapters. Before switching on the metal detector on the contactor, the negative resistance level is checked. The indicated parameter averages 45 ohms.