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Homemade metal detector quasar. Reviews about the metal detector quasar arm. The QUASAR - ARM metal detector will be a pleasant assistant in your search. Happy searching

And so, in the article we will talk a little about the quasar avr metal detector, look into the history, analyze the characteristics and consider all aspects related to its creation.

Metal detector quasar avr - this device is based on the principle of inductive balance, if in a simple way, then IB. Selective and has VDI, 16 sectors of discrimination, each can be closed. All spare parts, according to the author, are available. Direct signal processing.

Quasar Specifications:

  • Discrimination - yes, 16 sectors.
  • Selectivity is present.
  • Multitonality is present.
  • Operating frequency - up to 17 kHz (depending on firmware and coil).

In general, this is a rather complicated metal detector to assemble. It is definitely not suitable for beginners, there is enough trouble with both the board and the coil. But if you are a more or less experienced fighter, then stock up on strength and go ahead.

Quasar metal detector circuit

In principle, according to the scheme, there is nothing to say here, here you need to look and figure it out yourself, all on your own and with your own hands. Here is her picture, and below is a link to her.

Quasar avr coil

Now let's talk about how to make a coil for a quasar. For a quasar, a DD sensor is used, which has the following parameters:

  • TX - approximately 40 or 45 turns of 0.5 mm wire.
  • RX - wire 0.2 mm, number of turns - 200.

The connection diagram itself looks like this:

As you can see, TX is connected according to a series resonance circuit, and RX is connected in parallel. TX is tuned to a frequency from 4.5 to 9 kHz, in RX to a frequency lower - from 1.5 to 2 kHz.

Quasar metal detector setup

Let's talk a little about the settings of this device, what operational settings it has. This means that the quasar avr metal detector has the following settings:

  • Volume control - from 0 to 7 units.
  • The response threshold is the reciprocal of the sensitivity and takes values ​​from 1 to 30.
  • Ground balance.
  • Mask - covers sectors that are not of interest to us.
  • Display backlight - on and off.
  • Backlight level - well, everything is clear here.
  • Gain - coarse gain of the path, one step in 2 times.
  • Volume Change - Varies the volume, depending on the weak responses, the range is from 1 to 32.
  • Sound delay - everything is clear here, the delay in the appearance of a signal after a target is detected.
  • Ignoring impulses is also a tool against interference, it closes those impulses that are short in duration.
  • Ferrite calibration.
  • Sensor balance.
  • Transmission frequency - allows you to adjust the transmission frequency.

Finished with setting up the quasar arm, now let's talk about the firmware.

Quasar metal detector firmware

In principle, there is not even anything to tell here, download the latest version on the author's website or ours, and flash it. Here are the images of how the fuses should be.

Quasar metal detector reviews

In general, the Quasar metal detector has received very good reviews. One of the most popular home-made devices, in many respects, it can be compared with medium and high-level industrial metal detectors. An excellent device that competes with many devices. Its subsequent versions are further developed. Beginners should think about it, because a quasar is cheaper, even if you order from someone, than the same ICQ 150th or 250th, and its characteristics are many times better. So think, decide. But if you decide to buy, the main thing is to find a good seller and manufacturer, so that later you don’t suffer and swear at the device. A lot depends on the manufacturer and build quality. Look for reviews.

And finally, a little video of work and detecting with a quasar metal detector.

It should be emphasized that the quality of the Quasar ARM metal detector (I am more impressed with the Latin spelling Quasar ARM) fundamentally depends on the quality of manufacture and layout of the printed circuit board (there are only more than ten options for sale, and not all of them are good), the quality of components and installation, and especially - on the quality of the sensor. Therefore, it is ridiculous to read negative reviews about the device as a whole, based on the experience of assembling an inept assembly from parts found in the trash. Moreover, judging by the information from various specialized forums, such ugly crafts make up the bulk of the devices and sensors offered for purchase. Faster, cheaper, and so it will do - apparently, this is the main setting of most sellers (by no means do I speak for everyone). Of course, this approach entails a lot of negative reviews about the device, although it would be wise to make a review about the manufacturer. To set up the Quasar AWS well and make a decent sensor, you need not only knowledge and experience, but also normal measuring equipment, not to mention the ability to use it. Craftsmen, on the other hand, often make do with a Chinese tester from a flea market .. this is also possible, but is it worth waiting for a good result? Another moment, many "Kulibins", not even having basic knowledge in the field of electronics, are trying in every possible way to "finish" and "improve" the author's circuit (I often cite it as an example of high-quality development) created by a professional. Based on these, so to speak, improvements, printed circuit boards are then hastily divorced, which immediately go on sale. What can I say ... just that such crafts are not related to the real Quasar AWS and any reviews about such "Quasars" are nothing more than a painting of one's own incompetence. Hereinafter, we will focus exclusively on devices assembled by direct hands according to the author's scheme.

Review of the Quasar ARM metal detector

Quasar AWP, assembled by me on the author's board revision 1.4, firmware, current at the time of writing this review - version 2.2.10. A family of self-made sensors from a sniper rifle to a “steering wheel” for medium frequencies of 7..9 kHz. The scheme is the author's, without changes.

I can immediately responsibly declare that a properly assembled Quasar AWP from high-quality components, equipped with a well-manufactured sensor, has search characteristics that often surpass top-end devices from leading manufacturers in their segment (ground single-frequency IB-devices). This does not negate the obligatory understanding of the principles of operation and the ability to configure the Quasar AWS for specific conditions, as, indeed, any branded metal detector.

In addition to the Quasar AWP, I collected and tested analog devices, such as Tesoro Vaquero and Lobo, Whites Classic in different variations, some ancient Fisher .. they were all monophonic, I personally didn’t like it. The plans are to collect something like Golden Mask 4, two-tone analog .. but these are plans. From digital cameras, I assembled Quasar AVR, impulse versions of Clone (author Andy_F), Fortuna-M. Of the branded ones, there were Koschey-25K, Terka-705, I tried new digital Whites, now I use Deus (studied and sorted up and down). This is all to the fact that I have something to compare. Perhaps it will seem to someone that I am “singing praises” to the device ... this is not so. He, like everything in the world, has flaws, I will definitely write about them. Therefore, without false modesty, I can say that my review of the Quasar ARM will be objective and honest.

So, from the very beginning.

Schematic diagram. As an electronics engineer by education and hobby, I rate the circuit at 4.9 out of 5.0. Here it is appropriate to quote a teacher-professor: “Only the Lord knows the Sopromat very well, I know for a four, and all of you (students) - at best for a three!”. No matter how much I looked at the scheme, I couldn’t improve something (I’m not a guru, of course, but I have experience in developing and implementing it in production). Do it differently, yes, but improve it, no.

Printed circuit board. From the point of view of signal wiring, the author's one is good, but for self-production it is difficult due to the large number of vias, besides, it was originally bred for a non-standard and scarce type of display. You can install a regular one on it, with a couple of “extra” wires, this is not critical. Otherwise, one of the best, if not the best. All other boards will be a separate review.

used components. Widespread, not scarce and not expensive. The total cost does not exceed $40 if you buy everything new. The display is better to use the OLED type, but it is somewhat more expensive than a conventional LCD.

Repeatability. High .. no, the highest. Everything works without any hardware settings, the main thing is to correctly assemble it from serviceable components and rinse the board normally from the flux. The operation is practically independent of the spread of the parameters of the parts - a sign of a high-quality circuit design.

Flexibility of settings. Everything you need for an effective search. Especially worth noting is the perfectly working sensor imbalance compensator (allows you to work normally even with a “floated” sensor, or with an “almost suitable” factory one), a switchable auto ground balance with adjustable response time, a set of ground filters (velocities) for all occasions, 8 memorized profiles , arbitrary mask for voice acting. Vector cutting of the ground, which allows you to very accurately “cut” it without loss of range (well, almost without loss). There is a static pin mode with discrimination and VDI display. The set of settings corresponds to a professional level, so it is advisable to understand the issue a little and not twist at random. However, by default everything is fine.

Voice acting, display. Three voice acting schemes, including polyphony (Scheme 1), I consider it the most informative. The sound is soft and pleasant. Adjusting the volume of weak signals, a few extra. options, including trashhold. 16-sector signograph, display of VDI number, signal strength, battery level, current ground angle, transmitter current. Signograph display delay adjustment. Again we see a set for a professional. Very informative and convenient. The latest versions of the circuit and board have a built-in FM transmitter for using wireless headphones. Works great, all settings are in the menu. Do you know many devices with wireless "ears" by default and with transmitter adjustments?

Depth. Depends on the settings, mainly on the filter. The threshold also has an effect. The slower, the deeper. On the slowest filter with a threshold of 3, with a DD25cm sensor, you can “feel” a patch of tips at 35..38cm. This is in light ground, for example, a Deus with a 28cm sensor catches only slightly better, “at the end”, on similar “depth” settings.

Identification and separation of goals. In fact, everything here depends more and more on the sensor and settings. But if compared with the same sensors, then at the maximum speed the Quasar AWP approximately corresponds to the speed of the Deus in the "second gear", that is, Reactivity = 2 (out of 5). Very good, with a small sensor on the trash very comfortable. The separation with the appropriate filter settings is excellent, the selection of color against the background of black signals is also at the Deus level, no subjective differences were found. If they see, then both devices, if they don’t see, both devices too.

Stability, general comfort. On high. If the same Deus with "quiet" settings turns into a pumpkin, then the Quasar ARM almost does not lose in depth. That is, it is more comfortable to search with a normal Quasar AWP than with a Deus, this is in clean places. Deus has no equal in the trash, but if there are not many signals, you can walk with Quasar almost in silence, and Deus will slightly blabber - but he is somewhat deeper. The Quasar AWP is one of the most comfortable in search of all the devices that I had.

Flaws. How could it be without them .. however, they are all subjective, but nonetheless. For starters, I don't like the small number of voice acting schemes and the inability to adjust the frequencies and volumes of the sectors for myself. In the same Koshchei-25K, Fortune-M it was and it is convenient. I really hope that the author will eventually listen to this opinion, it is not only mine. Then the speed, it (after Deus) seems a little insufficient for strong trash cans. In the pin mode, sometimes (rarely) it “starts up”, it is treated by resetting it with the “left” button (in this case, it is tied to the current response level). I attract by the ears: for an effective search, it requires some knowledge in this area, an understanding of the physics of processes. However, like any other professional device.

Conclusion: Quasar AWP is, in my opinion, the best of home-made devices in terms of the totality of characteristics. Nothing more, nothing less.

The Quasar Arm metal detector (in English quasar arm) is a selective, IB device created and designed by Andreev Fedorov, aka Andy_F. This device has become a continuation of the Quasar line on microcontrollers, in this case on the controller of the STM32 family.

In this article, we will look at its characteristics, field tests and consider the materials that we may need in case we wish to make it ourselves. Many more people are interested in such a question, does he distinguish metals? But here it is noticeable to the naked eye that the metal detector quasar arm (quasar arm) with discrimination.

Specifications Quasar Arm:

  • The supply voltage is from 6 to 15 volts.
  • Current consumption - an average of 150 to 200 mA, depending on the settings.
  • Multitonality is present.
  • Sector masks are present.
  • Operating modes - dynamics and statics.
  • Operating frequency - it all depends on the sensor, from 4 to 20 kHz.
  • The principle of operation is single-frequency, IB.

These are not all characteristics, but they give a general idea of ​​\u200b\u200bthe device. If you have not yet turned around and are ready to assemble the quasar arm with your own hands, then let's analyze what we need to assemble it.

Quasar arm diagram

Let's talk about the scheme md quasar arm, it will be provided below. In general, this is a rather complicated device and it is not suitable for beginners, here you need to understand the processes and have soldering experience. This is how the quasar arm diagram looks like:

By the way, we are enclosing a list of parts for this device, save it so as not to lose it.

Quasar arm board

Now let's talk about the printed circuit board, it looks like this:

Well, there is nothing to say here, download, print and etch. Note that some are interested in ordering boards from China. There is such an opportunity, there are manufacturers on the same Aliexpress, just write to them in a personal, throw off the fee in .lay, pay and wait until they send it. The boards are made on professional equipment and are of decent quality. The disadvantages of this method are that most do not work individually (I got from 5 pieces), and the price for a large number is already quite high. But if you order for sale or with friends, then there is no problem.

coil quasar arm

So we moved on to the moment of making a coil for a quasar arm metal detector, it was decided not to describe everything, but to show a video. Because it is better to see once than to hear 100 times, well, in this case, read it. This 20-minute video tells how to make a sensor with your own hands, about coil mixing and much more, there are also useful comments under the video.

Here is the diagram, it is the same as in previous versions of the device.

Quasar arm setting

Now let's talk about what the setup of the quasar arm metal detector is. Just like that, the device will not work, or it will not work correctly. You need to make settings, of which there are a lot in it, you also need to be able to calibrate the device and tune out from the ground.

It's all a long song, if everything is described. And again the saying about what is better to see once comes to mind. So we are putting together a fairly detailed video about its settings.

This video is from a fairly competent person who assembles these gadgets. And to paint each item of its settings - it makes no sense, a monkey's work in general. If you can't set it up, then watch this video. We talked about setting up the MD quasar, learned how to set it up, and moved on.

firmware quasar arm

As for the firmware, version 2.2.3 is now relevant, if you need an earlier one, then visit the author's website. Now about how to flash a quasar arm. We will attach a video, of course there is an older firmware, but the principle is the same, there is nothing to paint here either.

Quasar arm block

You can make a block yourself by making it from any beautiful box. They also sell ready-made boxes for the quasar, they are made to size and have a beautiful look. Good blocks are sold on Chinese sites, there is also a fairly large selection. Here is the sticker for the device:

So, the block of the metal detector quasar arm was dismantled, let's move on.

Quasar arm instruction

This is not a simple device and you can not do without instructions. In the manual you will find troubleshooting, answers to many questions, for example: repair of a quasar arm, problems with a weak sensor and input amplifier, information on a quasar arm with fm and other malfunctions of this metal shocker. Also, if the video is not enough for you, then there will be information on the quasar arm menu.

Metal detector quasar arm reviews

I believe that if you read this article, then everything is clear. A good and high-quality unit is this Quasar arm. Of course, there are some nuances, but in terms of parameters it surpasses many industrial units. I would like to note that if you purchase a ready-made device, then treat the choice of the artist very well. Because the quality directly depends on the assembly, but the prices for this device are different from manufacturers. We do not recommend taking from those who sell used or individual schemes (not a store and not a master), you may be left without support if the seller disappears. Find those who have a lot of reviews.

Quasar arm video

Here are a couple of videos from the quasar arm, here is a cop with it and video tests. Take a look and see if you need it. Also a comparison video - Koschey 25k against a quasar arm.

So we figured out how to make a quasar arm metal detector with our own hands, I hope the article was useful for you.

Once, I also had a chance to assemble the Quasar. I will miss the assembly of the block, because. There is nothing complicated there, I will stop on the coil. According to the recommendations of the Author, a DD sensor was used with the following parameters: outer diameter 230 mm, in the transmitting coil TX - 40-45 turns of wire 0.5 mm, RX - 200 turns of wire 0.2 mm. The TX circuit is connected according to a series resonance circuit, the approximate capacitance is 0.3 uF. It was tuned to a frequency of 8.5 kHz, but in general the device can operate at a frequency of 4.5 - 9 kHz. The RX circuit is connected in a parallel resonance circuit, and is tuned to a frequency 1.5 - 2 kHz below the TX resonant frequency.

Subtleties:


We wind the second coil in the opposite direction relative to the first one (the current of the DD coil must flow in one direction) because we wind the coil on one template, the second coil will turn upside down and the current will flow in the opposite direction.

To obtain in the future (after filling with epoxy the coil is slightly out of balance) the minimum voltage, when winding the last turns of the transmitter coil, wind them with a margin to make a loop at the bottom of the “tuning turns” coils, and do not flood them. Now that everything is filled with resin, move this loop in different directions until you achieve a minimum voltage on the receiver coil, then you can finish pouring.

Coils were wound on mandrels and impregnated with "88" glue. Coil stiffness
after drying is such that they can be bent to obtain the desired configuration.

The output of the receiving circuit that is closest to Cx (i.e., the internal output) should sit on the mass. This nuance affects the quality of the balance.

If the detuning of the soil and ferit is in the red, solder the ends in places in the RX and everything will go to +.

When adjusting from the ground, the value should not be more than +80, roughly speaking, it should be from 0 to +35, the detuning from the ground affects the feel. The less interference, the weaker the scent.

If with foil, then shield only the RX (lower receiving) coil. TX - you can not shield. If you shield both, then only through the insulation between them. If cover
graphite, then completely without any gaps.

The pressure seal must be in the TX field, the coil leads must not pass through Cx (the center is the intersection of the coils)

The autobalance button must be pressed with the sensor raised, and then lowered - raised.

For 5 kopecks of the USSR in black soil with a 25cm DD coil, there should be a sensitivity of at least 25cm with clear discrimination. VDI can jump at 30cm, somewhere in 1-2 sectors with a figure of 3 segments (but there should be no gaps between the segments, such gaps will be if the target is black metal) and there should be a high beep on both sides of the swing, so you need to choose whether to trust the VDI or the audio signal more. In Quasar, everything depends on the parameters of the coil...

KVAZAR ARM (Quasar ARM) - is a metal detector with direct processing, developed on a modern basis using an ARM processor.

The main characteristics of the device:

  • Sensor DD 30x32 cm 6-11 kHz.
  • Multi-level display backlight is adjustable.
  • Voiceover is multi-tonal with the ability to select voiceover options in relation to search conditions.
  • Targeting function (pinpointer).
  • Metal Discrimination - grouped into 16 sectors, three sectors go to ferrous metal, the rest to non-ferrous.
  • The ability to mask each of the 16 sectors, Masking unnecessary metals.
  • Ground balance setting is automatic, with manual adjustment if necessary.
  • device microprocessor, based on STM32 (fast signal processing).
  • Device weight: 1.3 kg fully assembled.
  • Numerical display of VDI on the display.
  • Information is displayed on a liquid crystal display and contains readings - supply voltage, battery charge, VDI scale (upper), "slider-scale" distance to the target, mask (metal type).
  • Adjustable bar.
  • Possibility of installing/changing software, in-circuit programming of the device is provided (this item must be performed by a specially trained person with the necessary equipment and skills). Until now, they have been released with firmware 2.1.8 and 2.1.9, but in practice they made sure that 2.1.4 is currently the best of the existing ones.

The main characteristics of this assembly:

  • Samsung 2600 lithium-ion battery(real capacity) mAh 3.7 V;
  • power converter-stabilizer DC-DC 3.7-6.3 V;
  • collapsible, adjustable rod, lower part - shock-resistant plastic, upper part - high-strength aluminum;
  • quality board, factory-made, double-sided with a protective mask and metallization of holes.

Sensitivity:

  • 2 kopecks 1817 = 30 cm (in the ground);
  • 1 ruble 1817 = 45 cm (in the ground);
  • average detection range by air = 30-55 cm for coins;
  • large metal objects up to 150 cm;
  • maximum depth (car) - 2 meters;
  • cuts nails and other debris

Equipment:

  • Coil 6-11 kHz, DD 30x32 cm.
  • Control block.
  • Collapsible bar.
  • The battery is lithium-ion.
  • Charger.
  • User manual.