DIY sensitive VLF METAL DETECTOR with Smartphone (detects a metal coin at 25 cm and pot lid at 1m)

[@Ltfy-vw6gn]

Thank you for sharing this video, please clarify three points , the first is one of the principles of resonance that the pulse generator has a sine wave, so how did the resonance work using a square wave, the second is the irf740 MOSFET was used to amplify the signal, the third is when the receiver was placed a capacitor microfarad should it match the transmitter capacitor

[@RuYZuP]

u tell us very simple u re good teacher 👍🏼

[@SentinelFive]

Hello Mirko, well done! However I am missing info on what the smallest detectable object is. Can you for example detect a 1mm piece of gold in very close distance? What would have to be changed to detect very fine gold - more copper windings, higher frequency?

[@davceski]

Zdravo Mirce, dali moze tuka vo MKD da se najde i da se kupi vakov signal generator?

[@electronic7979]

Excellent project. Very good 👍

[@bekirdogan4298]

selamun aleyküm. usta sen yaptın mı

[@electronic7979]

@@bekirdogan4298 ben yapmadım

[@t1d100]

Thank you for sharing a great project. What type of wave form does the signal generator output? Its description says it is a "block" wave, which I would think is a square wave. However, I thought that you said it was a triangle wave? If I used another signal source, what would be the best wave form to use? A sine wave? I do not think that I am finding the phone output audio amplifier/speaker circuit. I have a LM386 audio amp circuit that should be good for the job. Yes? What did you use? Please and thank you.

[@MirkoPavleskiMK]

The generated signal is square wave, and LM386 is good for the job

[@eng.qataminko5695]

How deep is the measurement underground?

[@muradothman7201]

hi sir in your project there is a part connect to pwm can you please tell me what is this part hint this part connect with 3 wire to PWM module

[@sternofashion7614]

What is app smartphone name to connect your VLF project metal detector mate? I was using smart Hunter app by neco but i got bad result signal mate.

[@shiva.chennai]

Can I do it with the oscillator circuit 40Mhz with induction coil. and detecting eddy current through receiver and amplify with op amp?

[@mariarivas9512]

First Thank you sir Second i have question So i try to build this machine and i used chimical capacitor My work Just from the picture of schematical The problème is i recieve continue sound and when i test with métal i have no change in the sound if you work with other composant or you have better schematical please tell us thank you for all

[@snowdigger]

Cool project, well filmed and explained. 👍 GL & HH

[@aonjon7529]

please reply ,can I use one smartphone as both signal generator from audio output and as receiver too

[@aonjon7529]

and use sine wave output generator instead of square wave will it impact the performance ?

[@harisankarmjunnithan4773]

Its very good easy to understand the techiques and very interesting

[@muhammetdemirbas6317]

Bobinleri ayirsak aralarını 1 MT yapsak yinede algılama yaparmi fisher gemini 3 gibi

[@abedayed7762]

can we increase the size of the coil for more distance

[@pinchikassandra]

Any answer to this ?

[@finefilms473]

App is detecting sound?

[@taloot123]

hello,,, i want to improve it to its limit,, if i provide class AB amp 50w.. do u think it will help?

[@MirkoPavleskiMK]

It's a good idea to give it a try, but I don't think the power across the coil has a big impact on the range. However, try it, and if there is an improvement, please inform me

[@taloot123]

@@MirkoPavleskiMK SURE,, i will try using U shape magnetic ferret,, but i need to buy xpt8871 so i can compare as evey design might be slightly different,

[@taloot123]

@@MirkoPavleskiMK Also i will add zero voltage transmission for the TX coil similar to this www.digikey.com/en/articles/a-review-of-zero-voltage-switching-and-its-importance-to-voltage-regulation

[@MirkoPavleskiMK]

@@taloot123 Ok I will wait for results

[@bekirdogan4298]

dostum yaptın mı sen

[@walmeqdadkhaled5381]

Can you please tell me what is voltage value of the capacitors you used and does the difference in inductance of the coils affect the sensitivity? I need an answer. please.

[@MirkoPavleskiMK]

I use capacitors with voltage of 250V but polyester capacitors with 63V or less can be used. The difference in the inductance of the coil affects the sensitivity, because with its change the resonant frequency also changes.

[@walmeqdadkhaled5381]

@@MirkoPavleskiMK thanks a lot.

[@otome6590]

Can you pls provide a clearer photo for the wiring? Thanks a lot

[@MirkoPavleskiMK]

Schematic: snipboard.io/xbzMTL.jpg

[@otome6590]

@@MirkoPavleskiMK i have seen this one and its a bit different from your final project

[@RuYZuP]

what values ​​did you enter in application frequency setting

[@MirkoPavleskiMK]

The application has no settings other than the sensitivity threshold with "+" and "-"

[@nestoreduardoriella540]

Q aplicacion se baja en el celu

[@matijalekovic339]

I'm making this metal detector, it's really the best tutorial for this on all of KZbin. I have a question: If I use 0.2mm wire instead of 0.5mm is it going to work normal?

[@silentgaming9328]

shall work well but you will need a lcr meter and make sure the inductance is same

[@alius6882]

First thanks for this successful work Then please how i can make more deep what i can do with coil to be better and discover deep

[@Incastro80]

Thanks for this project. Can I use 1uF ceramic capacitor?

[@MirkoPavleskiMK]

yes you can

[@Incastro80]

@@MirkoPavleskiMK In the video there is a speaker.. it's possible to avoid the smartphone? Can you post the speaker schematic with a link? Thanks..

[@MirkoPavleskiMK]

@@Incastro80 It is not possible to avoid the Smartphone. Speaker is connected to earphones output on smartphone thru small D-class Amplifier board

[@danangwarsito2178]

I was try with ecm preamp, its work without phone.. also can add led bar indicator to more beauty

[@MirkoPavleskiMK]

Please send me a schematic diagram, that is a great idea, my mail: [e-mail]. Thanks.

[@elmourhirbadreddine4555]

very good job I tried to make it but it did not work for me, I think the problem from coil, I used 0.3mm coil diameter?! please help me

[@danangwarsito2178]

I was make it.. its work well, now how about add small coil on tx and rx coil with same inductance?? Can it work too?

[@MirkoPavleskiMK]

Theoretically yes, but what is the function of that coils?

[@MirkoPavleskiMK]

Also, you need to set new frequency

[@danangwarsito2178]

Tx coil have many different perform, when small coil can detect smaller object, now we have 2 perform coil with 2 range, its look like good..

[@skr712]

Danang , have you make this?

[@lahrecheadame4327]

Please how can Select iron or copper detection

[@hanyatemanbelajar]

I am new to electronics, but your project is very interesting. I want to make one, but I am confused as follows: (1) to buy the resistor, which wattage should I buy? The 0.25 watt, 0,5 watt, or 1 watt? (2) And the power, do you mean it is "from 7,4 to 9 volt" , or can I just plug a 9 volt battery? (3) why the 2K resistor have down arrow while the 1K5 not? Thank you for your time reading and answering this..

[@MirkoPavleskiMK]

(1) All resistors are 0,25W (2) you can plug a 9V battery (3) you can put 1K or 1k5 resistor instead 2kPotentiometer

[@skr712]

Signal genaretor number ? Can i use any signal genaretor sir???

[@tushargondhali2934]

Can any one explain me about one small equipment which has near module and with connected to signal generater modul. And 2nd is 3 red colour capacitor which one shown in video or picture

[@MirkoPavleskiMK]

That module is a 3.3 V stabilizer because the one on the module burned out. The third capacitor is not connected, I was just testing the sensitivity with different capacities

[@abdulrahmanzam2803]

Can I put a headset instead of the phone

[@electroabdo5805]

What is the diameter of the two coils?

[@enriqueleclercq8894]

Hello friend, is the App you use on your cell phone paid or is it the free version? Thank you from Argentina.

[@MirkoPavleskiMK]

It is free

[@faysalbourguiba]

on which parameters should we update to increase the detection distance?

[@MirkoPavleskiMK]

In fact, I'm looking for a way to increase sensitivity. I am currently working on a new Arduino metal detector and I hope to upload the video in the coming weeks

[@faysalbourguiba]

@@MirkoPavleskiMK Waiting for this video eagerly Thank you

[@mehdighasmi6508]

Hi dear friend Thank you for your educational video Inside the box of your metal detector, you used 6 capacitors with and without poles, but there are 2 capacitors in the map. Please post a video of the complete circuit map of the metal detector so that we can fix this circuit. A warm hu

[@GameZone25253]

Hello sir. We have belt conveyor matel detector given alram , residual alternating voltage can not be lined out. Can you give us idea what we have to check . Metal detector is based on transmitter & receiver coils

[@Grovento]

Great work! There are more components in the video than in the schematic

[@MirkoPavleskiMK]

the scheme is certainly correct and more components seen in the video are left over from the testing of the device and are not connected

[@vnoota7760]

Can you give me the frequency and duty you use it in your project ???

[@TaylorTheOtter]

I think it wouldn't be very useful to know that since the frequency is dependent on the coil you use when you build it so you probably have to calculate it yourself. For capacitance C and inductance L, frequency f = 1/(2*pi*sqrt(L*C)). Somewhere in the video he said the duty cycle he used was 50%.

[@mustafakaya1345]

What is components ???

[@RuYZuP]

thanks for sharing. The photos you shared during the production phase contain materials that are not in the drawing. Is this confusing. Can you share a new photo showing the inside of the box? And in the drawing you didn't show where to connect the speaker pls

[@MirkoPavleskiMK]

I took those photos while testing the device. The scheme presented is exactly the one I used to make the final device. The speaker is connected to a small d-class audio board and the input of this amplifier is connected to the headphone output of the phone. You can hear the sound directly on the smartphone but with much lower volume

[@RuYZuP]

@@MirkoPavleskiMK thank you bro u re very friendly

[@محمدالحمادي-ط5ق]

عمل رائع نرجو منك عمل مخطط الدائرة كامل في ملف وتصميم كامبيوتر ايضاً تعمل عدد لفات السلك مع القطر إن سمحت وشكراً لك

[@otome6590]

THIS WAS A COOL PROJECT BUT PLS CAN YOU PROVIDE A SCHEMATICS OR A DIAGRAM ON HOW TO CONNECT THE AUDIO AMPLIFIER AND MAYBE ON HOW TO BUILD ONE OF THIS STUFF. SORRY I AM JUST NEW TO ELECTRONICS 😐☹️

[@MirkoPavleskiMK]

Audio amplifier is connected directly to phones output of Smartphone

[@ademkastrati8631]

Drugar kako date kontaktiram za da mi pomognesh da napravm edn vakof dektetor keti bidam mnogu zabllagodaran i keti kazham zoshto mi treba pliss

[@silvestrudocs130]

Please tell me if I can increase the frequency to 50 Khz What do I need to change and in what way. I need an answer Thank you.

[@MirkoPavleskiMK]

I do not understand why they would raise the frequency to 50KHz, because this is how everything works flawlessly

[@silvestrudocs130]

@@MirkoPavleskiMK I want to increase the frequency because I want to test on small gold nuggets at higher frequencies. Can a change be made?

[@MirkoPavleskiMK]

I have no experience, it is best to start with a lowering value of the capacitor C1

[@manoelbalbinoalvesdasilvab4898]

Hello my friend, how are you? I here country Brazil. wanted to know how to make a quest x5 metal detector coil? Thanks

[@MirkoPavleskiMK]

You need a try

[@manoelbalbinoalvesdasilvab4898]

@@MirkoPavleskiMK Sim

[@RuYZuP]

does it get the energy from the phone battery ?

[@MirkoPavleskiMK]

No, it contains lithium batteries

[@RuYZuP]

Mirko Pavleski I could not see where he put it in the diagram. How m V ?

[@RuYZuP]

Mirko Pavleski 9 ?

[@MirkoPavleskiMK]

@@RuYZuP As you can see on the diagram: 7.4V to 9V

[@RuYZuP]

Mirko Pavleski thank ypu

[@leonhardeuler8457]

can it find a big piece of metal 2 meters underground What's its range?

[@MirkoPavleskiMK]

IM not sure

[@jayaweerab7a485]

This locator indicate a gold ?

[@MirkoPavleskiMK]

Yes

[@kumarghatfun7397]

What's a mobile application?

[@MirkoPavleskiMK]

"Metal detector Smart Hunter" on GooglePlay

[@khallelkhan2202]

Can we another smartphone with signal generator app instead module? Thnx sir.

[@MirkoPavleskiMK]

Yes, you can use another smartphone as signal generator or any other signal source with given frequency

[@khallelkhan2202]

Thank you sir,

[@abedayed7762]

@@MirkoPavleskiMK pls how to make the connections in this case?

[@ali10739]

yaptım çalışmadı telefond srekli ses veriyor metali görmüyor

[@nareshkumar8487]

App ka naam kia ha sir

[@stevens4689]

Can you post a link to the signal generator.

[@MirkoPavleskiMK]

www.aliexpress.com/item/4000641068322.html?spm=a2g0o.productlist.0.0.d4d95efdiCpi4y&algo_pvid=98742bde-1f1d-408b-a8d3-2a6f0e57296b&algo_expid=98742bde-1f1d-408b-a8d3-2a6f0e57296b-6&btsid=0ab50f6215886025427623967efb73&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_

[@stevens4689]

@@MirkoPavleskiMK thank you.

[@Ltfy-vw6gn]

Thank you for sharing this video, please clarify three points , the first is one of the principles of resonance that the pulse generator has a sine wave, so how did the resonance work using a square wave, the second is the irf740 MOSFET was used to amplify the signal, the third is when the receiver was placed a capacitor microfarad should it match the transmitter capacitor

[@محمدالحمادي-ط5ق]

اخي هل يلتقط الحديد أم لا

[@adriaannikken7519]

Going to try to build one. hey even if i fail, the phone is old. no one cares. it would be nice to somehow integrate both types of metal detectors (pulse, and induction) in to one WATERPROOf unit, plus i could have a clock, gps, and who knows what else

[@tp_cnx]

what is app ?

[@MirkoPavleskiMK]

neco-desarrollo.es

[@tp_cnx]

@@MirkoPavleskiMK Where does it press to load?

[@stefanusteofilius8186]

can this find gold?

[@MirkoPavleskiMK]

Yes

[@halilyilmaz7888]

@@MirkoPavleskiMK hey bro i made this but thats not detects gold. How can i reach you.?

[@MirkoPavleskiMK]

@@halilyilmaz7888 The device detects any metal equally, but there is no discriminator to determine exactly which metal it is

[@vegadecirus]

Name of App?

[@MirkoPavleskiMK]

play.google.com/store/apps/details?id=com.neco.desarrollo.detectordemetales&hl=en_US&gl=US

[@azax83]

this app is sound detector not metal. I bought premium version. Everything a fake ?

[@Musakhancoins]

we want to watch full video recording of all you do no problem if video get long step by step tanks

[@azax83]

can you send the connection diagram of 4 ends in the phone jack

[@MirkoPavleskiMK]

snipboard.io/xbzMTL.jpg

[@azax83]

@@MirkoPavleskiMK I can't see clearly in this picture, how do I connect the connection without using speakers

[@azax83]

pls help me

[@MirkoPavleskiMK]

@@azax83 You can connect only :MIC" and "GND"

[@augolden7334]

Please can you send me an assemble one except smart phone and how much, for philippines

[@MirkoPavleskiMK]

Sorry, No

[@jaymoge]

I really think this is the beginning of a game changer for detectorists but, you need to study more on the hobby. No one uses a detector this way. Watch videos on KZbin to see how it's done my friend and develope your technology from there. An app assisted metal detector is a great idea, kind of like flying a quadcopter with your phone you'll need all the tech in the machine and the app just allows for wireless function and readings and adjustments. I'll stay tuned and see how this goes. Good proof of concept.

[@leonhardeuler8457]

But despite that he described it well unlike others

[@rahmatmetaldetektorpalopo]

Waw amazing👍

[@gulhanerdogan4560]

Çok güzel olmuş programın adı nedir

[@MirkoPavleskiMK]

Go to: neco-desarrollo.es

[@bekirdogan4298]

merhaba yaptınızı mı siz ben malzemeleri topluyorum

[@kaptanmike1957]

​@@bekirdogan4298 merhaba yapabildiniz mi

[@Appregator]

25cm .. not bad range at all for a coin.

[@electroabdo5805]

Can an oscillator be used? ne555

[@MirkoPavleskiMK]

Yes, but it is much more difficult to set the correct frequency

[@electroabdo5805]

Can you help please, how much is the file size in ohms?

[@Grovento]

Great!

[@nestoreduardoriella540]

Y el programa?

[@ali10739]

is anyone made this dedectör . realy worrking

[@idrisesit2275]

Videon dan hic bir sey anlasilmiyor parca ve program isimlerini yazsan artii devre semasi koysan daha iyiydi

[@మీరవిచంద్ర]

I want one piece Can sell

[@MirkoPavleskiMK]

In my case frequency is 4.74 kHz and duty cycle always is 50%

[@wisataalam1]

Aplication respon vibration

[@GenesioGama]

Legal gostei parabéns sucesso meu amigo,tenho um canal que eu explicou uma modificação no md4030 pra tira detecção falsa e ficou muito bom da uma olhada lá amigo

[@David_11111]

Yay must read

[@kapilaillukkumbura6495]

super

[@lilyharith354]

👍👍👍

[@Yousefi-lq1fl]

❤❤❤❤❤❤❤❤❤❤❤❤❤

[@kaptendindabajaklaut724]

Ok

[@ortadoguled]

Code arduino and app android

[@dinushaomayadisanayakadinu4218]

Mata oyata kata karanna kamayak nethda

[@syahrilanuar34]

Mama

[@murtazaali3865]

All parts sent name me plz

[@MirkoPavleskiMK]

snipboard.io/xbzMTL.jpg

[@murtazaali3865]

Thanks sir Another one long range make metal detector plz i am waiting for your video

[@azax83]

why dont u answer me pls

[@MirkoPavleskiMK]

you must set frequency to 4.74 (that is 4.74 KHz) and NOT 474 (that is 474Hz)

[@azax83]

@@MirkoPavleskiMK i know that my mistake but i did it i set 4.74 but now continuous beeping sound. it never silences and does not react to metal

[@azax83]

@@MirkoPavleskiMK I do not know what can I do ://

[@MirkoPavleskiMK]

@@azax83 both coils must have the shape and dimensions given in the figure and must be positioned precisely over each other so that there is no sound

[@azax83]

@@MirkoPavleskiMK I know I'm busy with you, I'm sorry. 55 windings and 0,5 mm and diameter 16 cm

[@MARWANSIMA]

🙏🙏🙏👍👍👍🤝🤝🤝🙏🙏🙏

[@naimali2348]

বাংলা

[@naimali2348]

বলুন

[@محمدالحمادي-ط5ق]

عمل رائع نرجو منك عمل مخطط الدائرة كامل في ملف وتصميم كامبيوتر ايضاً تعمل عدد لفات السلك مع القطر إن سمحت وشكراً لك

[@MirkoPavleskiMK]

Thank you, no problem