I made a simple one using a two transistor oscillator with a 5 inch coil of 3/8 inch copper on the head. And in the box was another oscillator and mixer to the phones. The coax fed power to the head, and brought the signal back up to the head. It is a very simple looking device, but it worked fairly well. It had a flaw however as it seemed to be mainly for iron and especially for aluminum. Gold gave a weak and soft response.
Looks like it would be a fun project. Nice work! Do you know how much it would cost to make? Thank you for explaining the circuit so well and clear. That's seams to be somewhat rare and will definitely help me as I take on learning electronics.
Michael Crawford It was very inexpensive for me to make because I had almost everything laying around. You can purchase an inexpensive kit online, then make my larger coils, as well as any other changes. Thanks For Watching
I like Minelab metal detectors. If you're looking for deep items, then you need to buy a larger search coil for use with the metal detector. Larger coils have trouble detecting very small objects, but have no problem finding items larger than a pencil eraser.
Great video fella, again!!.... One thing... what setting do you measure henry's in? I was under the impression it was ohm's but I might be well off. Thanks again
Hey Martyn, You need a DMM that has an inductance setting for Henries. If you don't have one, you can buy a decent meter at a very reasonable cost on Ebay(Under $35). A good DMM for everything else except inductance would be the Vichy VC99. They are $35 shipped. Thanks For watching. Be sure to share.
10 - 20 yrs ago I'm a junkie of talking electronics.. lol..! They created lots of great quality electronic hobby stuffs.. I did lots of stuffs especially the whole series of fm bug for my kids through fm radio as receiver.. 😁😁😁.. its really fun for them.. also small simple robots like Harbi mouse of USA made.. kids love them.. So, kindly tell me what's the depth range for this metal detector.? God knows, I might wanna try this too at this age.. hihihi.. my hands & fingers are still steady to solder.. 🤭🤭🤭 Thank you for the excellent video.. especially when its schematics are from Talking Electronics..! You'll never go wrong.. ❤️❤️❤️💝💝💝👍👍👍
Thats amazing : I want to make one to find coins . Its overwhelming to see all the expensive metal detectors out there . I'm an average joe that has some electronics background and I've always thought there has to be a way to metal detect without buying all the expensive bells and whistles for coin hunting
I have a video coming up in 5 days showing how I made a small 10T POT with a knob. If you do not use a 10T POT, the sensitivity adjustment can be very difficult.
ok i will wait until your video is uploaded!! ive been making your projects i 11 project i already done and they were all usefull like inverter pwm,generator,auto cut off for battery charger
If you can fit a large 10 turn potentiometer inside your project enclosure, then this is what you need to buy: www.ebay.com/sch/i.html?_from=R40|R40|R40|R40&_sacat=0&_nkw=10+turn+precision+potentiometer&_sop=15 If you want something small that works just fine and is cheaper, then wait for the video. Thank You!
I realize that this is an older video, but if you are still doing these kind of projects, you might want to try building the Russian PIRAT pulse induction detector. Mine detects coins at 8 to 9 inches, and bigger stuff much deeper. It's not good for trashy areas though. Just the nature of the beast. I may have to see about building one of these as well, if I can get more depth out of it. Good video. Rekindled my interest.
I'm sorry but I'm a noob with circuits still but what does it mean to be in parallel with something such as you said with the cap and the transmit winding at 06:34?
+christopher jones Hey Chris. Please refer to the link below! www.swtc.edu/ag_power/electrical/lecture/parallel_circuits.htm Thanks For Watching. Be sure to share with others and rate thumbs up.
Have you tried different transmit frequencies such as 2200m, 630m, 160m, 80m, 40m 20m, 10m, 6m, 2m, 1.25m, 70 cm? Have you tested your transmit coil for SWR to verify that it is tuned? Have you tested using different wire thicknesses as that can change bandwidths?
Larger coils locate larger objects deeper, smaller coils find smaller objects better but with less depth. You can experiment with a different # of turns, but I do not think much change will occur. Thanks For Watching!
For larger objects like a quarter, it's further. You can't expect too much from such a simple circuit. Thanks for watching! Be sure to check out my extensive video playlists below for other videos of interest to you, and most importantly share my channel with others. ua-cam.com/users/electronicsnmoreplaylists
Echoing Uncle Doug's comment... but I am interested in knowing/understanding (to a small degree), what is it that Minelab, GB2, etc., companies do to their products allowing them to charge 7G and more? I realize one is PI and the other, I think, is VLF (and no, I don't exactly understand the difference...I should have finished my college degree for Electronics Eng.!). Great video, I will try to build one myself!
What a beautiful circuit board and so little on it also! This is more or less the "first" video on metal detectors so I have no direct reference.. but I think your detector looks awesome! =D
+electronicsNmore - Unfortunately I've already put my thumbs up already ;) But I'm checking through more videos, so you will surely get some more thumbs up =D
@@electronicsNmore Thanks, you helped me a lot! I have only 1 more question. Is it essential to use your pcb or is it possible to connect everything on a solderable breadboard?
On the schematic at talking electronics there is a 390 ohm surface mount resister between the 500 ohm pot and the transistor did you include this in your circuit. Thanks
Joshua Dowler Hi Josh. There is a 200 ohm resistor in series with the POT. Be sure to use a 10T pot for easier adjustment. Refer to my other video below showing what I used for a POT. Thanks. ua-cam.com/video/DSQdB_j7xwQ/v-deo.html
Sir! How many turn do i need when using 0.3 mm wire? Ps: i did the same project using 0.3 wire ( 50 and 70 turns ) but there is a big noise even when i turn the pototiometer it decrease a little bit but thats it
@@electronicsNmore Sir I did but there is always that noise. I tryed without one coil and without both but the same thing happen I dont understand why is that. I added a temporary pototiometer with 10k between one wire from the 70 winding and the ground and the noise decreesed What could cause this problem sir. I need your help because my knowledge about electronics is very limited
HI, great project. Thank you very much. I have a question, how can one change the tone so that is resembles more of the high-pitched typical metal detector sound that I've become accustom to? Thank you!
Hi sir i watched the video carefully and I m very fond of these projects. plz excuse me to ask you whether you brought this datasheet from the mkll locator or no and thanks a lot sir.
I was wondering about the circuit and I had a couple of questions. Did you use a circuit board and do you actually have to make the circuit or can you purchase it online or somewhere
i hope i can build that so that i try to find gold or silver, thanks to you, by the way im in the phillipines, hard to get that items, but thank u, have a good day
+Антоан Янев Hi. Both coils are wound in the same direction then taped together, or you can wind one coil on the spool like in the video, and place the other coil tight on top. Thanks For Watching!
hei @electronicsNmore I want to create a metal detector for my secondary school project. But as you write in the video, can I buy the PCB already done? and where? thanks
The coil reciver is over the coil trasmitter, without isolation? Because in mine the speaker make a no stop sound ....always... and the sound not change.. near a metal or not.. the sound is the same.. I use 840 mH with 144 nF and 320 mH for the reciver..
I try now, but there is something strange.. When I insert battery and push on.. the led work and the speaker start the same sound.. even if I not insert coils..the sound don't stop... what happen? ... it didn't works :-(
I want to ask you one more on this detector if i connect the battery speaker is producting a tone, all circuit is consuming around 180mA and zener diode is very hot.Can you give me any advice please?
Yes. Thanks for watching! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my channel.
Excellent! Could be made more compact into a hand held module for finding screws/nails in timber before machining and hidden cables and metal pipework in walls/floors before drilling. This is on my list of things to make. Thanks.
+Lar&en Đ Hello. Please refer to the link below. Enter BC557 and BC327 in the cross reference box at the upper left of the web page. If both parts bring up the same NTE replacement part#, then you should be fine. www.nteinc.com/
+electronicsNmore I want to ask you one more on this detector if i connect the battery speaker is producting a tone, all circuit is consuming around 180mA and zener diode is very hot.Can you give me any advice please?
+harishvar akaash Hello. Use enamel wire/magnet wire which is .25mm or close in size. A "former" is what you use to wrap the turns of wire around for the correct diameter. You can use many objects. Thanks For Watching!
+electronicsNmore should i use only 70mm diameter former or can i vary the diameter????please reply soon as i am going to finish this project only the coil part is left>>>>
+electronicsNmore actually i didnt understand it so please say yes or no that whether i can vary the diameter size????and also is it necessary to wrap the coil around the diameter former in layers from top to bottom as mentioned in the video.....in the talking electronics site the coil is just wrapped around and are overlapping each other.....???please clear my doubt
dear electronics n more as u said to take the coil from the transformer i took it and now the problem is that the copper wire that i took from the transformer are seperated......i mean that the copper wire which i took out is cut from some edges so i wanted to ask that can i solder the ends of the coil with the another end of the other coil to make a 30 meter long coil???????
Tim Nelson Fairly stable. The 10T pot allows for easy threshold adjustment. Remember, this is a very simple metal detector, but it certainly works well for what it is.
Ciao innanzitutto complimenti per questo progetto. Vorrei sapere se come transistor PNP equivalenti potrei usare i bc557 e come NPN i bc337. Grazie in anticipo della risposta.
Contento ti sia piaciuto il video! Consultare la pagina qui sotto. Utilizzare la casella di riferimento incrociato nella parte superiore sinistra della pagina. Vedere se entrambi i transistor far apparire lo stesso transistor NTE. Essere sicuri di controllare la mia playlist di video per altri fantastici video di vostro interesse e condividere. Grazie www.nteinc.com/
I was looking at the schematic on the Talking Electronics Website, and I noticed that at one point I could buy all of the parts directly from you. Is that still an available option? When I clicked on the link, it opened an emailing app, but did not give me an address to order the parts from. Thank you for your help! I have loved the video.
+Zayna Pieper Hi there. You can send an email to Colin using the email address shown below. Be sure to tell him the kit you want to purchase, and also mention that you heard about his website from my channel. Thank You talking@tpg.com.au
how hard would it be to add a pot and circuit for a discriminator, possibly a switch and circuit for switching between all metal or disc modes? ... overall i like the basics of the control box, pipe/shaft. not a big fan of the tiny coil and coil assembly.
Okay... you ran yours at around 13 kHz(coil) , sooo... if I increase the frequency, does that mean that it will pick up smaller targets at a shallower depth? :)
That's a good thing as far as it's usefulness in former war zones goes, but its response to gold however seems to be entirely in your mind and only imaginary (24:30)
+harishvar akaash Wire diameter is not super critical. (.5mm) is not too large, but you are better off looking for thinner wire (26-30ga) from a transformer, relay, or solenoid which you can tear apart and remove the enamel wire.
+Iron Palazzo Contento ti sia piaciuto il mio video. Si prega di essere sicuri di controllare i miei altri video, votare thumbs up e condividere. Grazie!
Colin may sell them at his website in the video description area. Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You
I have a problem with the circuit, i cant hear anything using dc current, but when i use ac, i cam hearthe motorbating sound anf adjust the frequency, but it seems that i has very little effect from the metal objects. Could it be from the rgulator diode?
@@electronicsNmore i noticed that the 18ohm r from the speaker heats up when i apply more voltage. With dc the transmit coil gets about 13VAC. The AC i played with was small, around 30, and it implied its frequency on the speaker, besides thst i could hear the motorboating sound. The receive coil doesnt seem to pick up the current. I will test my transistors to make sure i did not demage anything, then doubl e check the connections. I had a hard time finding a b557, and i think i used a 2n3904. Aloso could not find a d rectifier 5v6 zener, and used 1n4148.
ok ive finished the circuit NOW i wil build the coil and i dont have a inductance meter please assist me! ive been making many of your project like pwm inverter,auto cut off battery charger,and many more!
He man, good job! I'm trying to do this circuit but don't work yet.... do you can help me send me a frame with the modifications that ou made, in this video the resolution is low....
Helo sir im from philipines..can u help me if where can i find the materials to use in that. Metal ditector sir...hard to find here in my location txks sir GODBLESS
Glad you enjoyed the video! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my channel with others. Thank you ua-cam.com/play/PLQ6IOhUBblU0bLg0LI8lmbqqCBEYjdMF-.html
do you ever tried out to go out and metal detect OUTDOOR does it detect 1 ich coin at HOW DEEP,and is it affected by ground effect? BEACAUSE I THINK I WILL MAKE THIS PROJECT YOU INSPIRED ME!!!!!!!!!
![Lp. Сердце Вселенной #60 РОЖДЕНИЕ ЛОЛОЛОШКИ [Финал] • Майнкрафт](http://i.ytimg.com/vi/YoR0pAV9FVQ/mqdefault.jpg)
Brilliant. This not only detects metal but heat sources also. Perfect then, for finding ideal spots for geothermal power stations.
I made a simple one using a two transistor oscillator with a 5 inch coil of 3/8 inch copper on the head. And in the box was another oscillator and mixer to the phones. The coax fed power to the head, and brought the signal back up to the head. It is a very simple looking device, but it worked fairly well. It had a flaw however as it seemed to be mainly for iron and especially for aluminum. Gold gave a weak and soft response.
Wonderful video. You inspired me, I love you. God Bless You.
Nice 👍🏻👍🏻 🇮🇳 || Kuki
You're detector looks better than some on the market. Great vid & job well done.10+
nigel mahabir Thank You! Please share my channel with others.
Will do
nigel mahabir
4 years on, still haven’t found a detector that looks worse than this...
ok i test it up its good i use3.5 inch coil got a lot of coins
I'm so shocked that how you made your own metal detector at home . So much information is required to make this kind of stuff keep rocking
Glad you enjoy my videos! Go through my video list, there's plenty you'll like. :-)
@@electronicsNmoreplease suggest me if there is any books for building this i want to build a one for 10 feet deep detection 😊 waiting for your reply
My metal detector is with me all of the time.
Metal detecting is fun. :-) Thanks for watching!
Excellent video, thanks.
You're welcome Rob!
Looks like it would be a fun project. Nice work! Do you know how much it would cost to make? Thank you for explaining the circuit so well and clear. That's seams to be somewhat rare and will definitely help me as I take on learning electronics.
Michael Crawford It was very inexpensive for me to make because I had almost everything laying around. You can purchase an inexpensive kit online, then make my larger coils, as well as any other changes.
Thanks For Watching
Very nice.👍👍👍
Very clear and well-explained. Thanks for posting :)
Uncle Doug Glad you enjoyed the video!
what about my device
Hey, this is brilliant for a low budget metal detector well done mate sounds and looks great :)
What would be the most powerful detector on the market..thanks again for a marvelous video
I like Minelab metal detectors. If you're looking for deep items, then you need to buy a larger search coil for use with the metal detector. Larger coils have trouble detecting very small objects, but have no problem finding items larger than a pencil eraser.
Автор - Молодец ! Спасибо ! Крепкого Здоровья Тебе !
21:57 he's actually moving his room door with his other hand 😂
Great video fella, again!!.... One thing... what setting do you measure henry's in? I was under the impression it was ohm's but I might be well off. Thanks again
Hey Martyn,
You need a DMM that has an inductance setting for Henries. If you don't have one, you can buy a decent meter at a very reasonable cost on Ebay(Under $35). A good DMM for everything else except inductance would be the Vichy VC99. They are $35 shipped.
Thanks For watching. Be sure to share.
Thanks fella, I'll check them out on ebay
@@electronicsNmore This one can penetrate a few meters underground, if you want to go deep, what self-control
10 - 20 yrs ago I'm a junkie of talking electronics.. lol..!
They created lots of great quality electronic hobby stuffs..
I did lots of stuffs especially the whole series of fm bug for my kids through fm radio as receiver.. 😁😁😁.. its really fun for them.. also small simple robots like Harbi mouse of USA made..
kids love them..
So, kindly tell me what's the depth range for this metal detector.?
God knows, I might wanna try this too at this age.. hihihi.. my hands & fingers are still steady to solder.. 🤭🤭🤭
Thank you for the excellent video.. especially when its schematics are from Talking Electronics..!
You'll never go wrong..
❤️❤️❤️💝💝💝👍👍👍
Depth varies with coil design/size. You can get a general idea in the video during the tests. Thanks for watching!
Can you modify the circuit to rapidly cycle various frequencies to better detect coins and jewelry?
jamienoel No. This is a SIMPLE circuit that works extremely well. What you want is a more complex circuit, using many more components.
Thank You
Thats amazing : I want to make one to find coins .
Its overwhelming to see all the expensive metal detectors out there . I'm an average joe that has some electronics background and I've always thought there has to be a way to metal detect without buying all the expensive bells and whistles for coin hunting
It's a fun project. You can also find low cost metal detectors at the affiliate link provided below. Thanks for watching!
bit.ly/3p0stsn
jaime lomayno The meter is more of a "Q meter" where the amplitude of oscillation is reduced by losses to the metal underground.
sir what is the 10 turn potensiometer im having problems with adjustment its very hard to adjust
how do you made that i cant see it in the video?
I have a video coming up in 5 days showing how I made a small 10T POT with a knob. If you do not use a 10T POT, the sensitivity adjustment can be very difficult.
ok i will wait until your video is uploaded!!
ive been making your projects i 11 project i already done and they were all usefull like inverter pwm,generator,auto cut off for battery charger
If you can fit a large 10 turn potentiometer inside your project enclosure, then this is what you need to buy:
www.ebay.com/sch/i.html?_from=R40|R40|R40|R40&_sacat=0&_nkw=10+turn+precision+potentiometer&_sop=15
If you want something small that works just fine and is cheaper, then wait for the video.
Thank You!
I realize that this is an older video, but if you are still doing these kind of projects, you might want to try building the Russian PIRAT pulse induction detector. Mine detects coins at 8 to 9 inches, and bigger stuff much deeper. It's not good for trashy areas though. Just the nature of the beast. I may have to see about building one of these as well, if I can get more depth out of it. Good video. Rekindled my interest.
Another fantastic how to video. Thank you for sharing.
All the best.
B
Thanks Bob!
I'm sorry but I'm a noob with circuits still but what does it mean to be in parallel with something such as you said with the cap and the transmit winding at 06:34?
+christopher jones
Hey Chris. Please refer to the link below!
www.swtc.edu/ag_power/electrical/lecture/parallel_circuits.htm
Thanks For Watching. Be sure to share with others and rate thumbs up.
Have you tried different transmit frequencies such as 2200m, 630m, 160m, 80m, 40m 20m, 10m, 6m, 2m, 1.25m, 70 cm? Have you tested your transmit coil for SWR to verify that it is tuned? Have you tested using different wire thicknesses as that can change bandwidths?
No, this was just a simple project.
electronicsNmore
If i double the coil turns will i detect deeper ? Or make the coil more width ?
Larger coils locate larger objects deeper, smaller coils find smaller objects better but with less depth. You can experiment with a different # of turns, but I do not think much change will occur.
Thanks For Watching!
what about my device ua-cam.com/video/EoXdKiXR1gw/v-deo.html
Thanks for the amazing video. what exactly can increase the penetration depth?
That's what she said.
Very clear and well explained. we see but is n't sensitive ..less than 10cm ... Thanks
For larger objects like a quarter, it's further. You can't expect too much from such a simple circuit. Thanks for watching! Be sure to check out my extensive video playlists below for other videos of interest to you, and most importantly share my channel with others.
ua-cam.com/users/electronicsnmoreplaylists
Echoing Uncle Doug's comment... but I am interested in knowing/understanding (to a small degree), what is it that Minelab, GB2, etc., companies do to their products allowing them to charge 7G and more? I realize one is PI and the other, I think, is VLF (and no, I don't exactly understand the difference...I should have finished my college degree for Electronics Eng.!). Great video, I will try to build one myself!
What a beautiful circuit board and so little on it also! This is more or less the "first" video on metal detectors so I have no direct reference.. but I think your detector looks awesome! =D
+Chris Fredriksson
Glad you enjoyed my video! Please be sure to check out my other videos, rate thumbs up, and share. Thank You
+Chris Fredriksson
Glad you enjoyed my video! Please be sure to check out my other videos, rate thumbs up, and share. Thank You
+electronicsNmore - Unfortunately I've already put my thumbs up already ;) But I'm checking through more videos, so you will surely get some more thumbs up =D
Thanks Chris.
what about my device
Hi friend, can i use BC 337 transistor insted of BC 338, they don't have BC 338 at local store..
Hello. Look at the list below to see if the part numbers cross over to the same NTE transistor. Thanks for watching!
elecurls.tripod.com/nte.htm
@@electronicsNmore Thanks, you helped me a lot! I have only 1 more question. Is it essential to use your pcb or is it possible to connect everything on a solderable breadboard?
What raises the frequency, the number of coils or raising the value of the capacitor?
+hhahn2012
Hi there. Both affect the frequency. More capacitance = lower frequency, lower inductance = lower frequency.
+hhahn2012
Hi there. Both affect the frequency. More capacitance = lower frequency, lower inductance = lower frequency.
+electronicsNmore Thank you! Off to have fun experimenting... hahaha
Great video, very simple. Thanks a lot for sharing!
+cavazzolig
You're welcome! I have many excellent videos on my channel. Be sure to check out my video playlists and share with others.
Thanks
Great Job. Thanks for sharing. How hard is it to put a bigger coil on it to detect deeper into the ground? Thanks
Thank you! Not too much work to make a larger coil. You can only detect so deep with a simple metal detector like this one.
@@electronicsNmore
Do you mean Only simple detector can detect deep objects? 20 ft for example with bigger transmitter coil? Can you explain please?
sir how much if i buy from u the whole homemade metal detector
+Mike De Laguna If you're going to buy a metal detector, buy a proper one.
Can i make coil with bigger gauge wire? How do i calculate that and how will it affect detection?
On the schematic at talking electronics there is a 390 ohm surface mount resister between the 500 ohm pot and the transistor did you include this in your circuit.
Thanks
Joshua Dowler Hi Josh. There is a 200 ohm resistor in series with the POT. Be sure to use a 10T pot for easier adjustment. Refer to my other video below showing what I used for a POT.
Thanks.
ua-cam.com/video/DSQdB_j7xwQ/v-deo.html
Sir! How many turn do i need when using 0.3 mm wire?
Ps: i did the same project using 0.3 wire ( 50 and 70 turns ) but there is a big noise even when i turn the pototiometer it decrease a little bit but thats it
Try winding one of the coils the opposite direction.
@@electronicsNmore Sir I did but there is always that noise. I tryed without one coil and without both but the same thing happen
I dont understand why is that.
I added a temporary pototiometer with 10k between one wire from the 70 winding and the ground and the noise decreesed
What could cause this problem sir. I need your help because my knowledge about electronics is very limited
Whats the range of this bro how deep it can sense please reply🙏🙏
HI, great project. Thank you very much. I have a question, how can one change the tone so that is resembles more of the high-pitched typical metal detector sound that I've become accustom to? Thank you!
Maybe try a capacitor in parallel with the piezo.
Awesome video!
Thanks for watching Jim! Be sure to check out my video playlists, rate thumbs up, and share my channel with others.
if i use a larger coil do i have to use bigger power supply ?
No. Same power supply.
what about my device ua-cam.com/video/EoXdKiXR1gw/v-deo.html
a very good tutorial video,,, so helpful
+Antonio Empleo
Thank You! Be sure to share my channel with others.
what about my device ua-cam.com/video/EoXdKiXR1gw/v-deo.html
Gostei do detector 🤝🙋💰💰💰💰
Cute little toy but did you really compare it to a Minelab?
Yes, Explorer II
which technology is used in this metal detector and what is the maximum range of the detector for large metallic objects..
Hi sir i watched the video carefully and I m very fond of these projects. plz excuse me to ask you whether you brought this datasheet from the mkll locator or no and thanks a lot sir.
I don't understand your question.
@@electronicsNmore he asks you about information source
I was wondering about the circuit and I had a couple of questions. Did you use a circuit board and do you actually have to make the circuit or can you purchase it online or somewhere
You can purchase a kit at the link in the video description area if you do not want to make the circuit yourself.
Thank You!
i hope i can build that so that i try to find gold or silver, thanks to you, by the way im in the phillipines, hard to get that items, but thank u, have a good day
jake canque Thanks For Watching!
Good going.keep it up👌
U from which country
I think double D coils will more sensitive.
They are, but this is a very simple circuit.
Hi, I have a question. There are two coils in the schematic but do you have to put both of them down in the circular kinda thing?
+Антоан Янев Hi. Both coils are wound in the same direction then taped together, or you can wind one coil on the spool like in the video, and place the other coil tight on top.
Thanks For Watching!
Oh, that really helped me! Thank you for the quick response, keep on the awesome videos!
hei @electronicsNmore I want to create a metal detector for my secondary school project. But as you write in the video, can I buy the PCB already done? and where? thanks
Giovanni Bianchi A link should be in the video descripition area. Thanks for watching!
electronicsNmore thank you, for your availability!
The problem is that when I open the link it sends me to my outlook e-mail and not to a shop..
The coil reciver is over the coil trasmitter, without isolation? Because in mine the speaker make a no stop sound ....always... and the sound not change.. near a metal or not.. the sound is the same.. I use 840 mH with 144 nF and 320 mH for the reciver..
Try reversing the leads going to one coil.
I try now, but there is something strange..
When I insert battery and push on.. the led work and the speaker start the same sound..
even if I not insert coils..the sound don't stop... what happen? ... it didn't works :-(
I there is it possible to increase it's range to 2 feet radially?
No. This is a simple device, but it will detect large objects very deep. Thanks for watching!
electronicsNmore
I mean by changing the components.
Thanks for sharing
I want to ask you one more on this detector if i connect the battery speaker is producting a tone, all circuit is consuming around 180mA and zener diode is very hot.Can you give me any advice please?
+Lar&en Đ
Check all components(or replace them), as well as all connections. Definitely something wrong.
can i use non polar polyester capacitors instead of 10n and 100n ceramic capacitors of same value
Yes. Thanks for watching! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my channel.
Thanks a lot for the detailed description of the tutorial ,more helpfull
Your welcome! Be sure to share my channel with others and rate Thumbs Up.
Thank You
Excellent! Could be made more compact into a hand held module for finding screws/nails in timber before machining and hidden cables and metal pipework in walls/floors before drilling. This is on my list of things to make. Thanks.
@Colin Mitchell go 5,. M v v v ... . .. . .. ......... j v B
Great video,I want to ask you if i can replace BC557 with BC327 and BC338 with BC337 .
+Lar&en Đ
Hello. Please refer to the link below. Enter BC557 and BC327 in the cross reference box at the upper left of the web page. If both parts bring up the same NTE replacement part#, then you should be fine.
www.nteinc.com/
+ electronicsNmore Thank you
+electronicsNmore I want to ask you one more on this detector if i connect the battery speaker is producting a tone, all circuit is consuming around 180mA and zener diode is very hot.Can you give me any advice please?
Dear electronicsNmore
should we take only 0.25 mm coil or can we substitute this?????and also please explain that what is a diameter former..???
+harishvar akaash
Hello. Use enamel wire/magnet wire which is .25mm or close in size. A "former" is what you use to wrap the turns of wire around for the correct diameter. You can use many objects.
Thanks For Watching!
+electronicsNmore
should i use only 70mm diameter former or can i vary the diameter????please reply soon as i am going to finish this project only the coil part is left>>>>
This was all discussed in the video. Please watch the video again. Thank You
+electronicsNmore
actually i didnt understand it so please say yes or no that whether i can vary the diameter size????and also is it necessary to wrap the coil around the diameter former in layers from top to bottom as mentioned in the video.....in the talking electronics site the coil is just wrapped around and are overlapping each other.....???please clear my doubt
+electronicsNmore
also plzz tell that how much inductance does the coil gives us????and how many we want?????
Could you make a head with both coils in it so you could find stuff in a better range of depth without switching out heads and doing 2 passes?
No. You only use one coil at a time.
This is soo cool,great job.
Strategist315 Glad you enjoyed the video! Be sure to share. Thanks
dear electronics n more
as u said to take the coil from the transformer i took it and now the problem is that the copper wire that i took from the transformer are seperated......i mean that the copper wire which i took out is cut from some edges so i wanted to ask that can i solder the ends of the coil with the another end of the other coil to make a 30 meter long coil???????
Did it work for you with 30 m? What's the purpose of it being 30. M anyway?
waw really nice
How stable is this circuit? Does the threshold drift?
Tim Nelson Fairly stable. The 10T pot allows for easy threshold adjustment. Remember, this is a very simple metal detector, but it certainly works well for what it is.
Ciao innanzitutto complimenti per questo progetto. Vorrei sapere se come transistor PNP equivalenti potrei usare i bc557 e come NPN i bc337. Grazie in anticipo della risposta.
Contento ti sia piaciuto il video! Consultare la pagina qui sotto. Utilizzare la casella di riferimento incrociato nella parte superiore sinistra della pagina. Vedere se entrambi i transistor far apparire lo stesso transistor NTE. Essere sicuri di controllare la mia playlist di video per altri fantastici video di vostro interesse e condividere. Grazie
www.nteinc.com/
Once again: Congratulations & many thanks!
Be sure to share my channel. Thank you!
Hi I am new to electronics, would you be able to post an updated schematic of the circuit
Joshua Dowler There is a link to the schematic located in the video description area. Any other changes I made were mentioned in the video.
Thanks.
Can you test battery powered riveters
I was looking at the schematic on the Talking Electronics Website, and I noticed that at one point I could buy all of the parts directly from you. Is that still an available option? When I clicked on the link, it opened an emailing app, but did not give me an address to order the parts from. Thank you for your help! I have loved the video.
+Zayna Pieper
Hi there. You can send an email to Colin using the email address shown below. Be sure to tell him the kit you want to purchase, and also mention that you heard about his website from my channel. Thank You
talking@tpg.com.au
+electronicsNmore Thank you!
what about my device ua-cam.com/video/EoXdKiXR1gw/v-deo.html
how hard would it be to add a pot and circuit for a discriminator, possibly a switch and circuit for switching between all metal or disc modes? ... overall i like the basics of the control box, pipe/shaft. not a big fan of the tiny coil and coil assembly.
Very difficult.
is it a bfo type?
Would this find tiny gold, about 6" deep. Up to About 1.5 mm cubed?
Too far from the coil for that size.
Okay... you ran yours at around 13 kHz(coil) , sooo... if I increase the frequency, does that mean that it will pick up smaller targets at a shallower depth? :)
Did the increase in frequency, made any difference? It didn't with me
can you please test with metal object berried in sand and in mud with small pebbles please. thank you.
That's a good thing as far as it's usefulness in former war zones goes, but its response to gold however seems to be entirely in your mind and only imaginary (24:30)
No problem detecting gold. LOL
Whats the inductance of the 70 turn winding?
Don't be concerned about that, just make the coil as explained in the video using the correct size wire.
@@electronicsNmore No, I need the inductance, as I am using if for something else and I dont have a lcr meter
@@jurevidovic9660 Sorry, cant tell you because the project is long gone.
Hi, I built this thing and I went by the original design and I am getting a constant tone from the speakers whether the coils are hooked up or not.
Try connecting one coil in reverse.
@@electronicsNmore I did and it did not work. Should it be silent if the coils are not hooked up?
hello how about a bigger object will it be detected at longer distance?? tnx
Larger objects are detected further from the coil. Orientation of the object also has an effect on distance.
Did u tried small gold nugget on it ?
No, it will find gold, but not small specks of gold.
can you please tell any substitute for this .25mm..beaczz it is not available here...any substitute like .5mm or 1 mm or?????
+harishvar akaash
Wire diameter is not super critical. (.5mm) is not too large, but you are better off looking for thinner wire (26-30ga) from a transformer, relay, or solenoid which you can tear apart and remove the enamel wire.
+electronicsNmore
ohk
Ciao , bravo ottimo video , filmato molto bello bravo
+Iron Palazzo
Contento ti sia piaciuto il mio video. Si prega di essere sicuri di
controllare i miei altri video, votare thumbs up e condividere. Grazie!
Are there ready circuit boards for sale?
Colin may sell them at his website in the video description area. Glad you enjoyed the video! I have a lot of excellent videos on my channel that cover many different subjects, so be sure to check out my extensive video playlists for other videos of interest to you, rate thumbs up, and share my channel with others. Thank You
I have a problem with the circuit, i cant hear anything using dc current, but when i use ac, i cam hearthe motorbating sound anf adjust the frequency, but it seems that i has very little effect from the metal objects. Could it be from the rgulator diode?
You likely damaged the components but trying AC.
@@electronicsNmore i noticed that the 18ohm r from the speaker heats up when i apply more voltage. With dc the transmit coil gets about 13VAC.
The AC i played with was small, around 30, and it implied its frequency on the speaker, besides thst i could hear the motorboating sound.
The receive coil doesnt seem to pick up the current.
I will test my transistors to make sure i did not demage anything, then doubl e check the connections. I had a hard time finding a b557, and i think i used a 2n3904. Aloso could not find a d rectifier 5v6 zener, and used 1n4148.
ok ive finished the circuit NOW i wil build the coil and i dont have a inductance meter please assist me! ive been making many of your project like pwm inverter,auto cut off battery charger,and many more!
So range is 6-8 inches under ground?
Yes, that's correct.
are kits still awalible?
Maybe at "talkingelectronics.com".
He man, good job! I'm trying to do this circuit but don't work yet.... do you can help me send me a frame with the modifications that ou made, in this video the resolution is low....
Helo sir im from philipines..can u help me if where can i find the materials to use in that. Metal ditector sir...hard to find here in my location txks sir GODBLESS
Hi sir, I really want to know how to make a detactor for gold
can u show to make a long range(15 feet)
What depth can be detected in gold and spaces
I showed gold in the video. Thanks for watching
Can the speaker or headphone change into a buzzer?
I think it might be easier to hear.
No, the tone is critical. It allows you to hear subtle changes.
Hey EnMore. Is this BHO? VLF?
+Eric jones
The meter is more of a "Q meter" where the amplitude of oscillation is reduced by losses to the metal underground.
electronicsNmore it has to be one or the other. looked up q meter and nothing shows up.
*****
No, this unit uses induction. Definitely not a BFO. They also sell pulse induction metal detectors. This unit operates in a similar way.
electronicsNmore I found a blurb on Q meters that are similar to nail finders,stud sensors. thanks.
How many KH can I use about this project????
Perhaps some extra electronics to compare the input with the output and show out differences in beeps would be better
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Glad you enjoyed the video! Be sure to check out my extensive video playlists for other great videos of interest to you, rate thumbs up, and share my channel with others. Thank you
ua-cam.com/play/PLQ6IOhUBblU0bLg0LI8lmbqqCBEYjdMF-.html
hi sir how much detect range
Hello, that was mentioned in the video. Thanks for watching!
I'd say about 6" for most metals
do you ever tried out to go out and metal detect OUTDOOR does it detect 1 ich coin at HOW DEEP,and is it affected by ground effect? BEACAUSE I THINK I WILL MAKE THIS PROJECT YOU INSPIRED ME!!!!!!!!!