Listen Through CONCRETE WALLS & FLOORS / Locate Leaks
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- Опубликовано: 12 май 2014
- How to listen through walls and floors(including concrete), or thick plate glass for spying purposes, or leak detection. I discovered this circuit at the link posted below. The circuit was designed/modified by John Wilson Jr, and I added a simple LED power indicator w/resistor, and made one modification to one of the capacitors. This circuit performed far better than I ever imagined. This is a circuit that you will definitely want to put together. For more info/details, please watch the video.
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Thank You!
Website & Schematic is located here:
i.postimg.cc/4dmcWK8Y/1hxwcg.jpg
My other EXCELLENT spy/audio listening device video (L & R mic's ~ stereo), is located here:
• Stereo Bionic Ears - S...
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Наука
I was more than a little surprised to find that image link still working a decade later. Thanks!
Good to see your projects, I went to electronics school and don't even use my training to component level anymore.
This is a great video/circuit.....Thanks for sharing. I am having trouble locating the same round piezo vibration sensor......I can only find smaller rectangle ones. Thanks again for sharing your knowledge so freely!!
This circuit works great, i built it on dot board 5cm x 7cm then mounted it in a small plastic box i added an extra 3.5mm socket so i could plug different piezio transducers in, it picks up my watch ticking on a wooden table, it will also pick up sounds from down stairs when the piezo is placed against a bedroom door upstairs, an excellent circuit that works, thanks
Glad you like it. Check out the other circuit below.
ruclips.net/video/nvzp8pFBd_M/видео.html
Big Thumbs up. Sorry for my lack of comments. Still on the mend. I've watched Liked, Shared and added to my playlists, everyone of your videos to show my support. Thank you for an other awesome project.
Take care.
Bobby
Thank You VERY much. I have many subscribers, but only a small percentage have gone out of their way to post links/share my videos to help my channel to grow. You are certainly part of that small percentage. Thanks Again! Get well.
Doug
Great video`s keep them coming.
That is excellent... I wish I had the ability to build one it seems 10 times better than a gadget store equivalent I have been wanting to try something like that for my lock picking hobby
Great use for it. :-)
Hi eNmore,
Now this was one great video you upload. Wow thanks alot. I'm going to build this for sure.
Thanks for all your other videos. As always it give me great pleasure to watch.
Glad you enjoyed it. There are many other great circuits shown on this channel. Be sure to look over my video playlist. Thanks!
@@electronicsNmore do you sell it llready built
I commented a while back when i first built this to say it worked well, if you add a 10uf capacitor between pins 1 and 8 on the LM386 it increases the gain from 20 to 200, i was surprised the improvement in distance and volume of what can be heard, it may be too sensitive for some with a gain of 200 by adding a 1.2k resistor and 10uf capacitor the gain is x50, i'm going to leave the gain at 200, it works great.
Great idea. Glad it worked well for you!
Can you share the diagram? Thanks
Great videos man
Glad You like them!
device is a very sensitive hearing device and with an equaliser and some other electronic equipment to single out certain kind of sounds could be very useful this is very good demonstration and could go even further it would be nice to see if you would experiment with some other electronic equipment to isolate sounds certain kind of sounds just like a metal detector thank you very much
Can this be used as hearing aid with some modification? I have hearing difficulty. How to remove humming background noise?
ok amigo muchas gracias
a sound limiter would be considered good to prevent any kind of your damage and control sound levels take this and consideration thank you again
You did well with this. John S. Wilson has been a legend in bugging circles for decades. The sensitivity of your device is impressive, but if you really want to see something along these lines get a Martin L. Kaiser 2047U/C MKll electronic stethoscope. That contact mic is about as sensitive as you can get as far as I am aware. It also features an ultrasonic probe with amplifier to look for cameras. To get more sensitive than his unit you would need to bounce microwaves directly off of whatever you are wanting to listen to. His devices are what the government agencies have used for years. Kaiser is out of business but his stuff is still floating around.
Returned2Forever Thanks for watching, and thanks for the info!
No problem. If you are wanting more information on these topics you might check out the GBPPR Homebrew Military & Espionage Electronics website. Check out " Interferometric, " " Passive Resonant Cavity Spycatcher, " " Doppler Stethoscope " and " Remote Heartbeat " titles to get up to speed on whats out there.
Just weave in & out of the funky stuff. This guy...i'm tellin ya.
Check out TSCM group postings from James M. Atkinson and the Granite Island Group. Hunt up his posting on the 2010A Doppler Stethoscope for a crash course in remote sensing of vibrations. Despite the chump wars various versions of these types of devices have been in use since 1946, and without resonators since the late 1950's after phase demodulation was discovered.
There are new Kaiser units of the 2047U/C Mkll type on a popular auction site right now for $130. They are leftovers from his companies liquidation a few years ago. Punch in " TSCM. " The original cost on these was around $800 I think. Buy one and set the amp on " contact " and connect it to the mixer pin of an old police radar of the right type and you too can play crooked cop. Uh, gee, no offence to crooked cops. I am assuming you have checked out Kaiser's site, if not do so for a wealth of info. Watching people buy spaghetti sauce in the store will never be the same again. Have fun.
Oh and remember, when/if they call...record everything! Tape is cheap! Record everything! You might need it someday! Only kidding!
Nice project :),,a good replacement for a stethoscope as well :).
Thank You!
Actually this circuit performs superbly on any hard surface. The other circuit I have listed in the video description area is PERFECT for listening very clearly to your heart beat, airways, and any other sound transmitted by air.
Very nice project i know is old video but maybe someone can tell me where is potentiometer on this schematic (R11?) thanks
Very nice
Thank You!
hi. great project but u said that you made some changes into original schematics but u only gave the link of the original one. can u give the schematic after your modification..
The component RT (in top center of schematic) is that a 2.2K or a 22K resistor?
so are you selling these on eBay or anywhere? i bought acoustic amplifier few months to catch rodent in my wall but all i could hear is loud static blocking the real noise. i wonder if your custom one has similar problem or know how to fix it
Great project, added to my to-make-list. In the description you mentioned that you had done a change with one of the caps. Do you mind to tell me which one, and why?
Been a while, not sure. Just copy the circuit shown in the video, it works well. Thanks for watching!
it be more easier if you write the details of the transistors used on the schematic as they are not even listed in the parts list so only way to find out is to listen to the video to get the idea
Hi Doug can you please send me the parts list for listen through concrete walls I cannot get hold of it for some weird reason even at bugplan.
Thanka
Link works just fine, I checked. Thanks for watching!
Did you build this circuit on a breadboard first?
is the 10kΩ pot connected in series with a cap to the gain pins of the LM386?
Great build
Hey Matt,
I trusted the individual who designed the circuit. I soldered it all up w/o breadboarding it first. C11 is across the potentiometer(in parallel) with a momentary switch.
Hi Doug, what is the 'CP1' IC that you used in this project? i found it difficult to find in my local electronic store. Also just want to make sure, is the 0.01 Capacitor means 0.01uF? Thank you
LM386 IC, and yes for the cap.
@@electronicsNmore Thank you very much Doug!
very nice,.. how do i get to buy the plastic enclosures you've been using..
+mawuli dugbartey
You must buy the plastic project enclosure online at Radio Shack, and the white PVC cap at a hardware store.
Cool
I Have All The Parts From The Diagram/List - However, I'm Curious What The Transducer Is Actually Attached To? The "White" Colour Thing That You Press Against The Surfaces? I Was Thinking About Taking A Stethoscope End Apart And Hosing The Transducer Onto/Into That . . . . . . ? Thanks.
SpinInLine.Com Nothing more that a PVC cap glued to the piezo wafer.
That website looks like its parked for sale. Anywhere else to get that device? Preferably already built?
Would you ever consider selling one of those? How much does it cost to make? How much would you charge someone to buy one? I would really like to have one of these but I'm not much for circuit boards and soldering unfortunately.
Interesting. Why are some capacitors shown as uF, some as MFd and some blank? I assume they are all microfarad (uF)? There is one that is shown as 0.1 MFd. Is this 0.1 uF (microfarad) not Mega Farad. Thank you for the clarification!!
What is RT on the schematic? it looks like a 2.2k resistor in the BOM, why is it called RT?
Hi Doug, what kind of transistor that you used in this project?
Didn't realize the schematic lacked that info. The IC is LM386, and I think the NPN was 2n3904 or bc547.
@@electronicsNmore thanks doug, and also I want to ask, is there any newer schematic info for the circuit? the bugplan link is dead...
@@anindyoputrahadindras.9202 no
I have 1 aux hole in my listening unit for headphones but I want to record what the unit hears plz tell me what I need to be able to record what the unit hears thank you
All looks good thank you for the video I want to listen to my heart and blood flow in my arteries so do you think this would work?
No, the video below shows what works perfect for that. You make the device without the parabolic mic. Heart and lungs can be heard clearly. Thanks for watching!
ruclips.net/video/-dpMFqeQrC4/видео.html
@@electronicsNmore Thank you for your reply I will see if I can make one Bob
could you please tell me how to connect the LM385 ic because it isn't clear in the schematic, and MFD capacitor means micro F?
thank you
Please refer to the link posted in the video description area, or look up a LM358 IC online. Thanks
is this a simple amplifier? :)
I went to digikey and there are so many different specifications for everything, how do you know which one to buy? For instance, will any 10 MFD capacitor work, or does it have to have a certain voltage and ripple current rating?
All the caps can be 16V rated. Use electrolytics where shown in the schematic. You don't require special components. If you desire higher quality parts, then buy them.
Thanks For Watching
Ok. Thank You.
As you can tell I'm a newbie - another question , what is RT on the schematic? (is it just another resistor?)
Mike Rivers Yes, just another resistor.
electronicsNmore Thanks again I'd love to get this working ;)
Could the transistors be replaced with an OP-AMP?
I'm sure it could, but the existing circuit works so well, that I see no reason to change it. :-)
Thanks For Watching!
Hey Doug, Another nice detailed video. I tried building one but its not working for me. I tried with couple of piezo transducer, but none of them is working except the hissing sound .. :(
Hi Makesh,
I would double check everything you did, and swap out your transistors/lm386 for new ones. Something is not right. The circuit does work, and very well.
Thanks For Watching!
electronicsNmore Thank you.. Let me do that..
Can you tell me what the values if the other caps are in the schematic which are nit marked mfd, im getting confused with pf,nf,mfd etc please
Also, i have a load of capacitors with 50v and 25v ,would these work?
Mike Rivers All caps are in MFD. You can use any voltage rating higher than 9V.
electronicsNmore Thanks
I cant find the products list
f03-10-2023
(1.) Hi, there.
(2.) New to electronics.
(3.) Not understanding how to connect the different components.
(4.) Would you do a video for this project using a breadboard, along with listing each component’s specifics (category/type, value, wattage, percentage, voltage, etc., as it applies)?
(5.) Which sensors and type of screen (LCD, OLED, whatever) should be integrated so that a monitor/screen images in real-time the frequency of what’s detected and the distance of the noise source? (Frequency detection from sub-Hz to the GHz range.)
(6.) Thanks.
(7.) Toodles!
Do you make these to sell or know who does? I'm not too savvy at building electronics.
You can try the link in the video description area. I think he sells kits. I knew a Jennifer Hill growing up in NY. Thanks for watching!
did you find who makes them
Can you build me one? I’m an irrigation technician and I would love use this device to locate missing valves that are buried underground.
Just buy a piezo speaker about 1 USD, wire it onto a lead and plug it into the mic socket of a recorder or laptop, phone etc. It's really easy.
How can you detect that such apparatus is being used by other or in other rooms..? Plz help
No
For best listening add voice pass filter 300-3000Hz Hi pass filter reduce pops from walking... door opening, closing... I made similar device and works great...
Thanks for the tip and thanks for watching! Be sure to look over my extensive video playlists below for other great videos of interest to you, and share my channel with others.
ruclips.net/user/electronicsnmoreplaylists
Can you tell me how you made the filter?
@@beytullaherdogan4976 I use second order hight pass RC op amp filter ( about 300Hz )and passive 4th ordel RLC low pass filter ( 10kHz ). You can use operational amplifier based Sallen Key low pass and hight pass filters for voice band. Hight pass filter need with wariable cut off freqency 100...300Hz. Low pass about to 3...5kHz.
so what about that link in the description below you told about so we can build it
grumpy old fart Read the video description area. There is a link to the schematic.
hello Doug , can i use 2n2222 transistor?
Should work if replacing a similar NPN
thanks 👍
How about using this for finding lost people in Hurricane scenarios?Doesnt that sound good to you?Seems like I will subscribe to your Channel too bro,Thanks for all of your knowledge in these videos‼️👍🏻
I think this device would be too sensitive and pick up every little sound making it very difficult to hear a person. I'd use a FLIR thermal camera to look at the rubble for heat signatures, especially at night. Thanks for watching, and be sure to rate thumbs up and share.
I Have Around Half The Components Fixed To The Board So Far - I Have A Query . . . . . . Where Should "C9A" Go? It's Not On The Schematic And "C9" Appears To Lead To Ground. Thanks In Advance.
No idea. Ignore C9A.
yeah it does lead to ground, do you understand the capacitor values that's what is getting me
Does it work to detect water leakage under the floor?
Yes. Thanks for watching!
The webpage is down. Any other links?
Hi Dave. Thanks for informing me. Hopefully the web address is renewed soon, if not I'll look for the schematic.
I have another question. On the capacitor list, there is a C9A, but there is no C9A on the schematic. Where would C9A go?
Only use the components shown in the schematic. Match the values with the component list.
Thanks.
Ok. Thank You.
Can someone please make an easy to understand drawing/diagram on how to put this thing together on a breadboard(s) or one of those prototype boards? I know how to solder but that's it. I got the basics down on how to read the schematic but no clue how to wire everything in parallel (whatever that means).
en.wikipedia.org/wiki/Series_and_parallel_circuits
I actually went out and bought all the stuff needed for this last year but it didn't work after I put it together. I didn't (and still don't) understand the line connecting the 2 posts inside the chip and don't get the R3 and C7 thing because there's no dot there showing a connection but on the schematic they just like 'morph' into each other. Do I just leave their ends unconnected?
The line drawn inside the chip shows that you need to connect those 2 pins together. R3 and C7 are connected together in SERIES.
DAMN! :D
Glad you enjoyed the video! Be sure to rate thumbs up, share my channel with others, and check out my extensive video playlists for other great videos/projects of interest to you. Thanks
What size battery voltage?
9v
Since i assume this is of higher quality than a lot of listening devices i can get out there i really want to get my hands on one, only problem is i have no idea how to go about making one of these. Poked around google for a bit, would making a PCB make this easier? Hope you reply
Hi kidstryke,
The best thing to to would be to buy a small prototype PCB on Ebay, then once you have all the components, lay them out just as they are in the schematic. Leave enough space between the components so you can soldering everything together. You can use jumper wires or solder bridges to join the components together. Take your time when you make it.
Thanks For Watching.
**This device is EXCELLENT for listening through walls(solid objects). If you want an incredible listening device for use through air, then watch my other video. The link is in the video description area.
electronicsNmore thank you so much for replying!! I have a few more questions and was wondering if you could help me out a bit. Around how much am i going to spend if i decide to make one of these?? Also is there any way you could send me some links to some of the more difficult go get parts? Just to make sure i get the right ones and all that. I would greatly appreciate it. Im surprised you replied so fast, thanks again!
You need to look at the component list and purchase each part on Ebay. If you live in the USA, then find out which Radio Shack near you is going out of business. Components are all 50% off right now. You can buy the project box at Radio Shack and other things you may need as well. I have no idea how much it will cost, because I get most of my parts from junked electronics or I buy many components in bulk. This is as much as I can help you since I have questions from too many other people(I have over 260 videos). Unfortunately I can only reply to a question 1 or 2 times. Some channels don't bother to answer any questions at all.
Thank You. Good Luck with the project.
electronicsNmore Thank you so much, appreciate the help!
The links are dead. Can you reupload schematics and other things?
OK, new link up. Be sure to share my channel with many others! Thank you
Thanks bro!
please details of the transistors
A link to the schematic is located in the video description area. Thanks for watching!
@@electronicsNmore there is no details transistors in the schematic ,thank you for reply
Cool video. Shame the link doesn’t work anymore
I'll look for the schematic.
Thank you 👌🏻
I found the original schematic. The link is in the video description area!
hola amigo se te olvido poner los transitare, Q1 Q2 Q3 cual son
2N3904 o BC547
ok muchas gracias amigo
Asegúrese de compartir mi canal con los demás, revisa mi video listas de reproducción y tasa de pulgares para arriba. ¡Gracias!
ok por supuesto que si amigo
1개 구매 할수 있나요?? 만들어서 한국으로 보내주세요
How I buy this one plz help me
You need to make one. None are for sale. Thanks for watching!
How much would u sell one for
kaylees dad here / wow know you can listen while you spank it lol
Please could someone tell me the name of this device?
You cannot buy it.
I THINK people who can understand this kind of tech are very intelligent. Electrical engineering and understanding is on the level of brain surgery imho. I wish I knew where to even start, as far as establishing a good foundation and being able to understand and actually learn what is being presented. I am mecanically smart, but as far as this goes, I can nearly nearly grasp ohms law. Could it be Ive never had the right teachers or watched the right videos.? This is like the coolest hobby ever. Building stuff that is worth so much money, out of things that people throw away every day. Ive got all kinds of electrical components stacking up at my house. Thinking one day Id be able to do what this guy did. But its all so complicated, it seems. If anyone can advise or give me a recommendation on a free source or link or video, maybe you can share so others like myself can have the victory with this struggle.
Visit the link below. A great website to learn. Thanks for watching!
www.talkingelectronics.com/te_interactive_index.html
How can I buy one of this device
You can't.
Can I?
link of shematic not working please give link
Check video description area now. Thanks for watching!
@@electronicsNmore thank you bro
What is meant by (TD1) in the diagram?!
Piezo wafer
@@electronicsNmore thank you ❤️
من اين احصل علا جهاز مثل هذا اريد واحد
hola que son los con desadore MFD no lo conozco
+sergio david padron jorge Los valores del condensador son los microfaradios, que es iguales que el uF.
I want to make one insanly badly
It's a fun project, not too difficult.
WW1 tunnel diggers had a machine I don't know what side.
the amazing 4 mile microphone will do maybe better
Do you have a PCB image for this device?
Mike Rivers Hi Mike. There is no PCB image. This circuit was very simple, so I just soldered it together on a prototype PCB.
electronicsNmore I managed to get it working thanks for your help
Great.
Water leakig machine all canister number
can you give me a schematic diagram
Yes
@@dariffam8956 where can i get the schematic ?
I wonder if SWAT uses this before they raid my house?
Probably! LOL
can you make me one
Hi Pete. I only show what I made and supply viewers with a schematic.
Heasing from a neighber wife lol