"Last winter 2, after reading interesting articles on the pinpo channels and studying the schemes available on the Internet, I decided not to repeat these schemes, and try to develop my own. Immediately looked towards a small but" smart "microcontroller . The attempt was successful. Held with him the whole season (of course the goal finds MD "Mole-M" but to localize Pinpoker "Gnome-M") and no longer imagine how to do without him ... After all, I want to see how much you want to see that there "rang" in the ground .) "

Pin assistant on a kope number one!

I imagine: Pinpointer "Gnome-M" (2010)

• Simple and easily repeated scheme
• Sensitivity: 4 -5 cm coin, large metal object - 25 cm
• Mode of operation - static
• The sensitive element has the focus forward and in a circle of 360 °
• Availability of sound indication (scratcher) - change in tone
• The presence of light indication
• Sensitivity auto approach
• Recalls if you forgot to turn off
• Consumption ~ 3-5mA
• Miniature Dimensions of the Board12 x40mm.
• 2.7 -5V nutrition (2,3-minister or lithium)

Scheme

.
Ko c2 and C3 customers are better to put film. To improve thermostabilityovervestive with R2 it is recommended to put the PTS thermistor.

Scheme from TCV with keys

So it can look out the housingbut

.
.

Principle of operation Pinpoineter is based on measuring the volunteability of the oscillatory LC circuit. Approximation of metal objects to the contour leads to loss of energy (reduction of goodness) and, in consequence, a decrease in the amplitude of the signal on the LC circuit. Measurement, processing, all combing and generating a signal to the emitter are made by the program to the microcontroller.

Production:Manufacture fees (In print, check the "Mirror" checkbox)not difficult and requires only the skill of the installation of the SMD components, although it is possible to manufacture and on DIP -ighted components. On the details applied

. The instrument sensor is a ferrite rod (such are used in transistor receivers) with a length of 5-10 cm and a diameter of 8-10mm. Coils wind one over the other and contain 200 turns of isolated copper Wires 0.2-0.3 mm . It is necessary to observe the polarity of the connection, so in the absence of generation (15-20 kHz frequency) it is necessary to change the ends of any of the windings. Changes are allowed to change the parameters of the coil-pipe, length and diameter of the rod.
Tincture It comes down to the selection of voltage 1.0 V on the 2nd derivation of the microcontroller by the R2 stroke resistor, In the absence of a number of metal objects.
Design Pinpoinera can be any - board sensor and finger batteries or a lifting battery allows you to accommodate for example device in Z-23 case, orplastic plumbing pipe with an external diameter of 20mm.

ATTINY13-T - Changing the tone (03.09.2016)

Yet

The scheme is a fairly simple analog pinpoineer, for people who are searching for coins, but can not afford to buy a professional pinpointer. I collected this sample personally and confirm his full performance. I spread specially for him a printed circuit that can be found at the end of the article. According to the characteristics of Pinpoker, it's rather not bad, for the purpose of finding the most ....

MINIMAX-PP-2 PINPOINTER Scheme

according to the scheme, I think the issues will not arise, on pCB All elements are signed, pay attention to some details on the board do not converge with the scheme, since I raised it under what was in a local radio shop !!!
All capacitors that are used in the generator must necessarily be film with an operating voltage of no lower than 100 volts.
Regarding the contour coil L1, I wrapped it on the segment of the ferrite rod, with a diameter of 10 mm. With a magnetic antenna of an old radio. The length of the rod is 10 cm. The coil was winding in 4 layers enamelled with a diameter of 0.35 mm. Number of turns 450. After the winding, I rested the coil to the Tsaponlak and the heat shrink tube from above.
By printed circuit board, it is one-sided with the use of both the dip and SMD components, the buzzer is not just a speaker and speaker with a generator!

Well, on the last, several photos of the collected fee.

Soon lay out a small video with the work of this Pinpoinera
Download diagram and printed file

Pinpointer is a device included in the Metal Detector Family. It is used to search for metal objects in a variety of conditions, including under water. The name of the device comes from English pin Pointer.What is translated as a "point pointer". The simplest pinpointer has small sizes, similar to a pocket flashlight. It may well come in handy to search for hidden electrical wiring in the wall.

Appointment device

Pinpointer is a metal detector detector. It defines the exact location of the metal at quite a small depth, approximately about 5 cm. People who are engaged in the search of coins or other values \u200b\u200bof metal, up to archaeological, are called treasures. They work with pinpoisy in a wide variety of places: from official excavations to worked dumps. The factory models of metal detectors are not always comfortable for such purposes, and besides there are a lot of money. Therefore, it makes sense to assemble its own pinpointer according to the scheme. The device is maximally effective for use in a newly formed pit or dusting soil. The land can be scattered on a dense amount of grass or a large amount of foliage, which clearly makes it difficult to find the usual search for hunters. Knowing and experienced people claim that in this situation Pinpoker is the best choice.

Details for assembly

For the assembly of Pinpointer, you will need specific tools with your own hands. The main elements will be:

• Soldering set: a certain amount of tin, solder and solder itself.
• Different screwdriver set or set of nozzles for a screwdriver-database.
• Clamping tool: pliers, passage. Cutting: nippers or similar subject.
• To assemble the printed circuit board, it is necessary to stock profile material.

It is worth noting that for different models, the list of desired materials and tools may change during the assembly process. Also, the basic skills in the manufacture of such boards will become unchecified, the existence of knowledge in the field of electrical engineering and experience in it is welcome.

Circuit diagram Pinpoineher.

The underlying provisions of the device model are in the following parameters:

When assembling a pinpoineer, with their own hands, it is necessary to take into account the basic principle of its work - the level of quality measurement of the oscillating circuit. When the metallic object approaches it, the power is loss of energy. As a result of this process, the amplitude of the signal on the circuit is reduced.

To increase the sensitivity of the device in the assembly, it is better to use condensers of film type C2 and C3. The radiating element ZP-1 must be piezoceramic.

Build technology

By itself, the process of manufacturing a pinpoineer with its own hands is simple, but still will require certain skills to work with the SMD-components. Another option can serve as a DIP-output element. Ferrite rod that can be dismantled with an unnecessary transistor receiver will become a sensor. The rod must have about 110 cm long and equal to 10 mm in diameter. Winding in coils occurs on the principle of overlapping one to another. The material for it should serve the wire in the insulating winding. The wire must be copper with a diameter of 0.3 mm. The required number of turns should be 200 pieces.

Special attention should be paid to the polarity of the connection in the homemade pinpoine. In the absence of generation, the frequency of 15 kHz need to be changed the extreme points of any winding. The characteristics of the coil (such as the length, wire, the rod diameter) can be changed. But it is worth remembering that it will directly affect the sensitivity of the device.

The pinpoint adjustment is carried out by selecting the voltage in the second output of the microcontroller itself. It is necessary to do this with a trim resistor R2. At the time of the setting around the device there should be no metallic items. This will achieve the most efficient sensitivity. In the dimension will help the voltmeter. To do this, you will need a device with a high level of resistance, such as an oscilloscope.

Electron Frequency Pinpointer

How to make pinpoine in this option, will tell the principle of operation of the frequency meter. The assembly scheme will not cause special difficulties. The functioning is based on the process of operation of the electronic FM frequency meter. There is a discrimination against ferrous metals, the depth of the search for items is limited to 60 cm, the operating frequency is at the level of 19 kHz.

All required details are characterized by simplicity and availability. A little attention should be paid to capacitors that must have thermostable indicators. Such can be models K71 from the old Soviet multimeter. It is not recommended to use ceramic, they will not fit.

Important! The stability of the device directly depends on the quality of the condenser!

A power source for a pinpoineer can serve as batteries or other batteries with a voltage in 9-12 V. directly the printing board will need only 10 mA, the rest will "pull" the speaker alternative to which headphones can serve.

Analog pinpointer

The analog pinpointer is pretty easily going. Its effectiveness is to find exactly small objects, such as coins.

Capacitors for this type of metal detector on the generator are selected film species. The voltage must correspond 100 V and above. The contour coil can be mounted on the ferrite rod, the diameter of which should be 10 mm. You can also use a rod from a magnetic antenna built into old radio receivers. The nominal length of the rod should be 10 cm. For winding in the coil, an enameled wire is taken and wounds in 4 layers. After the completion of this process, it is necessary to carry out the procedure for processing the coil with a special varnish in the homemade pinpoine. At the end of the coil, it will be necessary to clip the heat shrink tube.

They differ quite strongly. It should also be borne in mind that the devices of this type have its own sensitivity. The main element of the pinpoineer can be boldly called the coil. It is installed most often orthogonal type. However, in this situation, much depends on the instrument accuracy class. In order to collect a simple pinpointer with your own hands, you need to familiarize yourself with the well-known configurations.

Model on two-wire condenser

To make this type of pinpointer with your own hands, you must first prepare the body for the device. For this, many experts recommend using a conventional flashlight. The main problem at this stage is to find a good modulator. As a rule, a non-linear analogue is selected for a two-wire capacitor. The coil is obliged directly to be located in front of the device. Batteries should be installed at the modulator. You can also extract from the flashlight. Minimum power batteries must be 200 mAh. For 25 minutes of continuous operation, this is enough.

Use of three-wire capacitors

Make with three-wire capacitors pinpointer with your own hands is quite difficult. The modulator in this case is suitable only linear type. Nowadays it is difficult to find it in Radioelectronics stores. It should also be borne in mind that the coil must be installed under the amplifier. Some additionally equip the devices with stabitron. To increase the sensitivity of the model, they fit perfectly. Batteries in this situation can be standard used from flashlight.

Model with an interrupt signal

To assemble this type of pinpointer with your own hands, you must first take the body from the flashlight. Minimum modulator threshold frequency is obliged to withstand in 200 Hz. All this will allow the sensitivity of the device at a high level. As a tester, this device is used quite often. To activate the interrupt mode, the regulator must be installed in the design.

Most often it uses a button type. In this case, it is necessary to pay attention to the features of the case that belonged to the flashlight. The coil for this purpose is better to pick up a simple. However, the input limit voltage is obliged to withstand at 15 V. all this will increase the accuracy of the readings.

Modification "Kid-FM2"

Collect pinpoine "kid-fm2" with their own hands is quite simple. The specified device is distinguished by the fact that its sensitivity is low. However, the cost of the model is extremely low, and for home use, the specified apparatus is suitable ideal. The modulator in this case is used nonlinear type. It is mounted directly near the regulator.

Most often in the market you can find exactly the turning counterparts. Inductance coil Entrance threshold tension Maximum can withstand at 10 V. It should also be noted that this device High current conductivity. It was achieved by installing Stabilon. Further, to collect Pinpointer with your own hands "Kid-FM", you need to solder capacitors. Only after that the contacts to Stabitron are connected. At the end of the work will only be fixed rechargeable batteries in the housing.

Pinpointer on low sensitivity transistors

Make a low sensitivity of pinpointer with your own hands on the transistors by such a device like a bipper. It is installed in the case immediately behind the modulator. The amplifier for this instrument is only a pulse type. In this case, the condensers for the device can be selected different. However, at least the input threshold voltage is required to withstand at 5 V.

It should also be noted that the stabilians are installed quite often in the device. The limit frequency is welcome at the level of 200 Hz. It is important to take into account that the accuracy of the readings depends on the bandwidth of this element most often does not exceed 3 MK. Batteries for the model are selected with a capacity of no more than 600 mAh. Enough this is about to ensure that the device continuously worked for 30 minutes.

High sensitivity model

High sensitivity How to make pinpointer do it yourself? To understand this issue, it should be understood that the coil will need for the assembly quite powerful. At least the threshold voltage is obliged to withstand at 20 B. It should also be noted that the modulators in this case are suitable only to linear type. Accuracy of readings also depends on the type of condensates.

In this situation, many experts advise you to use open-type models. On average, the parameter of the capacity in these elements varies in the 5 PF region. However, in this situation, much depends on the manufacturer of capacitors. If we talk about the stabilion, it is used with increased resistance. It is necessary to increase the sensitivity of the device. Batteries for such a model should be selected with a capacity of at least 900 mAh.

MINIMAX-PP modification

To assemble Pinpointer with your hands Minimax-PP, it is necessary to choose the Biper of the RR20 series. It should also be noted that the devices of this type are installed vibration mechanisms. At the same time, the indicators apply a wide variety. If we talk about the coil, it is used in this case orthogonal type. Threshold input voltage This component is obliged to withstand at least 15 V. At the same time, the resistance in the chain should not exceed 4 ohms.

The sensitivity of this device largely depends on the capacitors. All of them are provided in the standard diagram. One of them is mandatory installed near the coil. At the same time, the second is attached to the output on the modulator. The main problem of these devices can be considered a small bandwidth at 2 MK. Due to this, amplifiers are used in the instruments of this type quite rarely.

Device with an integrated controller

It is assembled in this type of pinpointer with your own hands (the diagram is shown below) is quite simple. First of all, it is necessary to pick up a good body for the device. In this case, the integral type controller does not occupy a lot. If you wish, it can be purchased at any store with radio engineering, and it is extremely small. A distinctive feature of this element can be called good conductivity. Capacitors in this case are installed two-electrode type. The resistance parameter on average varies in the region of 2 ohms.

It should also be noted that the coil must be installed primarily. To do this, you will have to use the soldering lamp. Next is fastened directly modulator. At the same time, the rear must be batteries. The amplifier in this case use it inexpedient. It is caused by the fact that the sensitivity of the device is significantly reduced due to improving the limiting frequency of the device.

Use of multilayer capacitors

Collected with multi-layer capacitors of pinpointer with their own hands (the scheme is shown below) only in the presence of orthogonal coils. Modulators in this case are suitable for linear and nonlinear types. It should also be borne in mind that vibration mechanisms are often installed in the devices of this type. At the same time, bippers can be found quite often.

Stabilians are often used to increase the sensitivity of the device. At the same time, cardiode analogues are especially popular in our time. It will be necessary to take advantage of them in general, it should be noted that models with multi-layer capacitors are universal, and for home use is fit perfectly. With their help, a person is able to quickly find out the exact location of the wiring in the wall.

Model on a monolithic board

Collect this type of pinpointer with your own hands is quite simple. These devices are distinguished not only by increased accuracy of indications, but also good sensitivity. For professionals, the specified model will fit well. Collect the device is necessary from the modulator fixation. In this case, many experts recommend using linear counterparts.

However, nonlinear modifications are also often found. Bippers in this case are installed behind the coil. The input threshold voltage parameter of the device should not exceed 20 V. To this end, Stabilians are mandatory. Regulators in this case are soldered at will. At the end of the work will only remain fixing the batteries.

Pinpointer with a resonance regulator

To fold the device with a resonant regulator, you need to prepare a soldering lamp in advance. First of all, a qualitative modulator is selected for the device. Many specialists in this situation still recommend using linear counterparts. It is quite difficult to find them in the store, but they should be able to cost little. On average, the conductivity parameter is 3 microns. Due to this, the input threshold voltage can be hoped at the level of 15 V. Stabilians for the device are suitable for the most diverse. Resistance to maximum they are obliged to keep at the level of 5 ohms. It should also be noted that in the beeres the device with regulators does not need.

Install the coil in this case is suitable last. In this case, the insulation of the wiring must be paid to special attention. It should also be remembered that the device housing must be completely sealed. To this end, as an option, you can use the rubber seal. Directly the knob must be soldered on the modulator. Capacitors in this situation are used mainly field-type. At least the battery capacity is obliged to be 800 mAh.

We present you one of our new developments - Sensitive Pinpointer. This device is intended to search for small metal objects. It is used in dealing with a metal detector during excavations - it is convenient to check the dug-out land for the presence of small coins, as or to search for metal reinforcements in the walls. From the advantages notes the simplicity and repeatability of the scheme, the mode is dynamic combined with static, auto-setup, high sensitivity, Availability GUN - (VCO).

Schematic diagram of homemade Pinpoinera:

The scheme was checked with a faeit rod with a diameter of 8 mm. Length 50 mm, 320 turns Wire 0.3. Ring with a diameter of 40 mm Wire 0.14 - 150 turns. Test on the ground spent with the coil ring. With sharp movements or rotation, the coil around its axis responds to the magnetic field of the Earth, but it does not particularly strain as the search is carried out with smooth movements and without rotational movements.

The flat coil can be made of a glass-plated plate with copper.

The 78L05 integral stabilizer can be replaced with a similar 5 volt output voltage. If it does not need a HUN (a voltage controlled generator), then the R16 resistor must be translated by 12 the leg of the U1B - shown by the dash line.

You can replace the PINPOINTER CT3102 transistors by any low-power silicon, the sound emitter can be applied to another with the resistance of the sound coil at least 100 ohms, but it is better to put piezo - it will be economically and loud enough. LED - any superhuman.

Power supply of this Pinpoinener from the 9-Volt Battery type "Crown". Pinopinger on the Pinpoinerate PCB is left for a sprocket-current switching for connecting to the battery. Also on the board left for flat coil. Coils in this case can be any design.

Capacitors C2 and C3 must be mandatory with film or other but with zero TKE, the remaining capacitors can be of any type.

The "threshold" control can not be installed, but with it you can increase sensitivity and also reduce when necessary. So I recommend not to clean it. The sensitivity of the pinpoineer is very high, a small gold ring begins to feel with a manual adjustment with 7 cm.

Here is the archive with in lay formatWhen hovering the cursor to the item is displayed the position of the element. The material sent - Slavake.

Discuss a pinpoker article