How To Make A Bionic Ear Spy Listening Device!

How to make a very high sensitivity parabolic mic spy listening device. Amazing stereo audio amplifying circuit! See exactly how I made this long range parabolic listening device, including the stereo parabolic attachment. Enjoy the video!

**I have drawn the schematic in the video, but you can also find this circuit in an EXCELLENT book called, "101 Spy Gadgets For The Evil Genius". Refer to the link below at Amazon to look over the book. I do not profit from the sale of the book.

**Want to listen through walls and floors? Then you will love my other video below:

**Save BIG money on Electronic Gadgets/Quadcopters/& much more at the link below! Many times items are cheaper than Ebay. You will also be supporting my work. :-)

Link to audio cable shown in this video:

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[steveone]

Parabolic dishes can be used to improve wi fi signals as well . Point the dish in the direction of the router and move the phone towards the centre of the dish to find its sweet spot .

[pierpa_pierpaolo]

Using a 'funnel at least of plastic of generous size, insert the microphone capsule through the tube and on the 'other side apply a metal plate in the direction of the "Fire" and it should still fit.

[hanasyarif]

one of the good project that is DOABLE ! Yes I knew, it is 4 years ago, but still a good diy project. Some suggestions to improve: wind noise reduction: put some 'fake fur' surrounding the mic. Ambient noise: add Tone Control (bass treble control) or even better, an equalizer to filter out unwanted frequencies. I think there is no point to put 2 microphones since they are positioned extremely close together, so no stereo effect created.

[guloguloguy]

once saw a similar project, but, instread of using a "parabolic" reflector to "collect" MORE sounds, they used a "HYPERBOLIC" shaped tube, (shaped like the flared end on a trumpet, to "EXCLUDE ALL sounds, except those entering directly in line with the AXIS of the trumpet-shaped barrel. The entering sound, could then be amplified, as needed, without inclusion of a lot extraneous/peripheral sounds being included into the final mix. This might be a valuable approach, for trying to gather a specific sound source, while eliminating all kinds of surrounding, distracting, sounds!

[coptechgold]

Good work, I have not worked with electronics for some time and that is what I went to school for.

[ReturnedForever]

Try an sesq83 or sesq84 for the dish for an improvement. There are others. If you really want to get serious on the amp you can use a device that was originally designed to pull in voices from 1.6 miles away with a 10 foot dish. Has high gain and tunable filters for voice. Get a copy of The Basement Buggers Bible if you can...then you can ride around in your car and feel special.

[lasersaber]

Very cool! Thanks for sharing. I think I will try building one up in the future.

[giovanni]

thanks for the video. old but gold. need more views

[robertnancarrow]

Very clear instructions well presented well done thank you

[arthurschroeder]

super project. you make it very simple to assemble this. thank you for your excellent vids.

[felixcat]

Very inspirational video. I will be using the alignment procedure using a laser pointer to make a precise 2.4 gig transmitter/receiver for wifi using an ESP module. I will also use the foam padding idea from ebay packing material to keep the battery from rattling around in my cheap Chinese multi meter. This channel is full of useful ideas. The reviews on inexpensive testing equipment is exceptional.

[KAYAPOGAN]

Really very good :) I am learning to teach kids, and they want to build a transmitter with a wireless receiver to beep a buzzer, also they asked me to build a little shock prank, I think they will learn If they have fun. But it needs to be very cheap, maybe we can recycle. Thank you so much again for sharing your project.

[ChristianJoyAzucenas]

Thanks for this sir, from your fellow DIYer. I do some changes, instead of using 2 potentio I'm gonna use single of it with 6 pins (dual linear rotary potentiometer)

[pierpa_pierpaolo]

lm 386 1-watt final amplifier. Too little, and other higher-performance ICs must be used. With the TDA 2030 IC we get 14 watts and begin to reason. :)

[Torsan]

You inspired me to make this device this weekend, but I forgot you made a new video and I just watched the old ones. The mics I got were pretty small about 5mm diameter, and they seem to be not quite as sensitive as yours. The seem to have a pretty limited range, ie they amplify great on a short distance if that makes sense. I found a lampshade for $1 yesterday that I'll try to make into a parabolic mic, though I think I'll just make it mono for simplicity to start with. Thank you for a great video. If you find more gadgets from this book that would be great!

[donaldspice]

Hi your device and video is so great but i'm a totally beginner. I have a few questions: 1.) Who i must connect the negative wire from the battery in the board? 2.) I seen in the video that you have connect the green and the black wire together from the right built-in-mic and soldered on the left contact from the mic. Who i must connect the black wire on the board from this both wires and on which contact from the parabolic-mic-female-jack i must connect the green wire? The green cable from the right contact of the right built-in-mic goes in the DPDT-switch, that i can see. 3.) Who i must connect the black wire from the left built-in-mic in the board? The green wire from the left built-in-mic i must connect on the underside of the DPDT-switch, right? 4.) The both green cables on top which come from the DPDT-swith, on which contacts of the parabolic-mic-female-jack i must connect? 5.) The black wire which going in the Ground from the headphone-jack i must connect on pin 2 from the left LM386, is that correct? I know that pin 2 & 4 of the left LM386 are connected together and this connected to the right LM386 with pin 2 &4 too. Sorry that i have so much questions, but i will build this device and please my friend can help me???? Or can you eventually make a remake video of this unbelievable device who you show how you place and solder all the parts on the board and how you connect all the cables on the parts? But from this updated device with the "DPDT-switch" and "the from this video! I can send you bucks with Paypal when you can make this video. I hope you can help me my friend!!! Thanks

[TheCrosx]

I'm somebody that knows NOTHING about electronics, and diagrams of them. However I follow directions along very well, and have made quite a few fun home projects. Is this something a Novice could make?

[charlesharriss]

Ad a low & Hi cut freq adjustable filter to this and you will rivle most commercial units.

[evacuatedspace]

Can you do a tear-down of a Wall Listening device so we can see what they are made of?

[zmangnay]

do they have higher quality microphones to use besides the one you have?