Make your own Spy Bug (Arduino Voice Recorder)

[@binachtzehn8492]

Quick tip for improving the code: instead of useing those rather compilcated switches just replace the filename with String(audiofile)+".wav" and you can record an unlimited number of files.

[@loufbread26]

What's the difference

[@7ire]

ohhh my god i was thinking same

[@avendanorency5795]

how do you do this?

[@ARandomHumanBein]

@@loufbread26 That with the code shown you can only create up to 10 files, instead, with this improvement, you can create as many files as can fit in the MicroSD

[@spicymemeboi2646]

sponsored by the NSA

[@greatscottlab]

Not quite

[@cosimo8046]

Spicy Meme Boi eazy plz

[@FluorescentGreen5]

add a transmitter that transmits directly to the NSA then yes

[@bloxcodes6576]

@@greatscottlab Im sure it is

[@YourLocalFBIAgent-gl7pu]

If you want a spy bug, just use your smartphone. Everyone has one and they are smaller.

[@bardenegri21]

The cool spy-bugs on TV send the audio through a radio. This gives me an idea for a "DIY or Buy": a walkie-talkie. There are a few very basic walkie-talkie tutorials based on arduino, but nothing really nice. You could try the analog version too, but a digital one would be more fun: sample the audio with the ADC, then send it over the air somehow (LoRA module maybe, or a cheapo 433mhz ook module pair), then receive and play it back with a DAC from resistors (or use a DAC chip, or a micro that has a DAC built-in like the SAMD21 found in the Adafruit Feather M0).

[@cummins6945]

www.aliexpress.com/item/FM-Frequency-Modulation-Wireless-Microphone-Module-DIY-Kit-FM-Transmitter-Board-Parts-Kits-Simple-Electronic-Production/32749629485.html This sends audio through FM radio

[@Un_Pour_Tous]

RPITX can accomplish this.

[@cdefgah4343]

You can easily achieve this by building a small FM transmitter, it is very tiny, easy to build and ceap (

[@shreelakshmi8263]

I tried this for my mini-project, it worked successfully! Thank you Great Scott

[@tirth9865]

Can you help me with it I am facing issues in my circuit

[@withteamsca4600]

Is it working now

[@antoniomateos902]

Could you please help me?? the led doesn't off when the push button its on :(

[@strapatser9427]

why not using the onboard led for notification, it would consume less power and you don't a extra led

[@greatscottlab]

Also possible

[@Jan-498]

But it'll be to bright?

[@danya023]

Unless you PWM it (and given the inherent complexity of recording audio on something so much not designed to do so), I think that would be a higher current draw than is desirable.

[@ninovitaliano7943]

@@danya023 neeeeerd

[@danya023]

@@ninovitaliano7943 I'm honored someone noticed, thanks. It's true though, isn't it? The onboard LED is rather bright and it takes around 10-20 mA, and if you're running off a battery you want to cut down on the current draw as much as you can so this is something you would disable first. The other option is to use PWM to modulate the LED, but AFAIK pin 13 doesn't have hardware PWM, so you have to spend processor cycles on this, and I bet that there's not much free processor time left over from "recording audio on something so very much not designed to do so".

[@pokulan]

As small as possible... Why not own PCB? ;p And instead of using switch 1.wav, 2.wav why not make string "record" + recordNumber + ".wav" ? :D

[@thriemboy1706]

and recordNumber could be stored on an extra recodNumberFile.txt to prevent overwriting of old data

[@pokulan]

Pixel Inside Or in EEPROM ;)

[@TheGTP1995]

Naming the files that way would look nicer but doesn't add any information. But if you wish you could add an RTC clock and add the timestamp to the file name.

[@zakups7777]

I think his focus was on the building, not the programming... ^^

[@jmsp000]

Indeed. And atleast for the use case of a spy bug, an arduino/micro controller is a little overkill. And what if someone discovers the device and destroys it and the SD card with the data? You can easily make a small FM transmitter (i made one thats 17x6.6mm). It wont transmit kilometers away, but enough so that you dont have to be right next to it.

[@antonrc1700]

Anstatt ne gopro session zu nehmen mit hd auflösung und gutem Mikro. Trotzedem ein super Video. Danke Scott

[@ams0063]

I can’t tell you how happy I am I was in great need of such a thing thank you very much

[@barbasbandas6665]

6:42 hey GreatScott! I can see you on that solder :D

[@Jonrobrt]

Impressive presentation - one of the best I have seen, great job!

[@zakups7777]

Why didn‘t you make your project with a perfect pcb? You are even advertising for jlcpcb...

[@greatscottlab]

True and I will use their service for more complex projects. But for such small projects I think that showing a circuit on a perfboard makes it more accessible for viewers.

[@richardwilliamjohnson8566]

GreatScott! Absolutely love your attitude. Keep up the good work!

[@dameck9570]

Thats the kind of video why i subscribed to your channel I ordered my first bpc at jlcbpc just a half week ago trough you.

[@buzhidao198]

The visuals in this video are beautiful. Watching the whole project come together felt so good. :O

[@p_mouse8676]

16khz is a very odd sampling rate. So make sure you always have subtraction of 44.1kHz or 48khz. (32khz, 22khz or 11khz) Also it's good to use some input filtering to prevent extra distortion (Shannon theorem).

[@enricorov]

Great work! It's always nice watching a product of yours.

[@UselessDuckCompany]

I'm trying to make a talking robot with a jaw servo that moves based on an audio signal from a 3.5mm audio jack. Any tips GreatScott?

[@lonsteam4627]

no. just stop

[@vincenzorubio4501]

I think that you can use the analog signal coming from the 3.5 mm jack and convert into a range of motion of the jaw servo! I think that should work

[@mrfashionguy1]

@@lonsteam4627 Fuck you sshole

[@johntello8904]

@@lonsteam4627 ?

[@moritz3864]

kzbin.info/www/bejne/mGLPcphtg7OfhdE

[@zanpekosak2383]

The more I watch these videos the more I question my pick of going to school for an electrotechnician. Seems sooo damn overwhelming.

[@guitarans]

Nevermore suprises for Christmas! 😀 Great as allways

[@jtcp27031]

I had been looking for this for month haha, your videos are really good

[@Ripaltico]

Your videos are always really nice, thank you very much.

[@greatscottlab]

You're welcome :-)

[@EasyElectronics2412]

The code is not getting uploaded can tell me pls????

[@eumesmo-kd1tr]

This is one of your best projects, thanks

[@Blue-bf8lv]

Even know I don't know much about circuits and voltages it's still good to watch

[@makaronimeesmakaronist6046]

I was just thinking about this. Perfect!

[@__.pranzzzz.__]

Hey GreatScott! make a tour of your lab in which you work for your projects .

[@ben2280]

for a "spy bug" I wouldn't use a push button with led. With a normal switch you can determin the state of the bug based on the position of the switch and you can use it as wake up signal to save battery when the device is off.

[@zulkifluabubakar6331]

This is a great video, It's the best I have seen that will help my project. 👍

[@thecoder5550]

Another week, another great video!

[@deadchords4919]

Yesterday i was searching about this... Nice timing!

[@greatscottlab]

I knew it ;-)

[@PierAisa]

Well done Scott ! Very useful and super explained.

[@greatscottlab]

Thank you very much :-)

[@PierAisa]

This night is my turn. I'll realize a video about 1KW DC motor control from scratch. Regards and stay forever like this. You are giving the possibility to everybody to learn something !!

[@PierAisa]

GreatScott! Here we are. Video of this night kzbin.info/www/bejne/kHOwmnyHatd9opI

[@CarlosBravo13]

Fabuloso como siempre. Espero cada semana tus videos. Hasta estoy pensando en traducirlos para la comunidad hispanohablante. Awesome like ever. I hope your videos every week. Even i am thinking in to traslate your videos to the Spanish for LatinAmerica

[@ams0063]

I am definitely going to build this. Thankyou very much as always awesome video

[@muh1h1]

4:09 LOL at that solder joint :D

[@PerKroon]

Actually did something similar with an ESP32 so I where able to control the "bug" via my phone, even download the files. :)

[@nolmon4948]

I am looking for a similar project you are describing, could you share the code?

[@isap-nikkoramos2660]

I am trying to do the same project with esp32 but Im new to this board. could you share the knowledge with me too? Thanks in advance

[@samchenyh]

Please share codes, doing a similar thing for my place. Thanks

[@ibrahimjinaah9046]

Send link to that

[@zulkifluabubakar6331]

Please help us send with the code 🙏🏼

[@maxximumb]

Nice project. Thanks for another great video.

[@akshaykolekar5903]

Thank you for uploading video of my adivice !

[@EasyElectronics2412]

Akshay Kolekar The code is not getting uploaded can tell me pls????

[@Darfy032]

Hey Great Scott. I really like the idea of the spy bug but why dont make it even smaller, replace the arduino with atmega 328p chip and make a pcb with your partner - JLC pcb. Please make a part 2 of this video.

[@HichamHicham-wt7dy]

Good idea Landimm but he could also put it in his pocket and add a camera so that we can spy on the teachers and an RC522 RFID reader to make sure that nobody used it

[@cyriljaneugenio9549]

good day sir. everytime i run the code this error comes in: "'class TMRpcm' has no member named 'startRecording'" ?

[@khaledabd-elhalim1899]

kzbin.info/www/bejne/enWyk6CBnM2BaJY

[@khaledabd-elhalim1899]

watch this video

[@Th3PingasTM]

CSI LIKE THIS VIDEO!

[@lucasazumi274]

NSA like this video

[@ankurnaidu]

i waited for this video for years

[@akshaykolekar5903]

Me too...

[@myetis1990]

5:35 if you wanna blow your battery , a lipo cell is a great choice as a heatsink for battery charger ic :)

[@abdul.rahim.k]

Really..... Ur videos are really informative.....!!!!!😘😘😘😘

[@Comrade_YG]

I need this for school so the teacher’s voice will get recorded and to spy on my private teacher who is doing really suspicious activities

[@R3MIXMODZ]

Thanks again for another great tutorial!

[@vaioskaliakoudas6388]

*You gained an hour of battery power range, by removin' both voltage regulator and smd led. What a big difference*

[@TheBrassn]

Hello Scott, great and very helpful videos you have there! May I ask you where you order your LiPo batteries from as a fellow German? Chinese traders don't ship here as far as I know. Thank you!

[@Postbus22]

"I created a Spybug, but please dont use it for spying" xD

[@JR-lx8nn]

Nicely done. Thank you. JR

[@paradox3875]

Great video. Short but informative as well,as usual! Grüße aus Hessen

[@greatscottlab]

Thanks mate :-)

[@efesstuff4936]

Please make a videos about galvanic isolation, safety and upgrading video for your peltier module cooler 😀. Nice to see you continue making videos for us 😃😃😃.

[@greatscottlab]

I have almost all of that on my to do list. It will happen when I get to it.

[@kvlpnd]

Excellent video as always.

[@sanjukumar]

Hello Scott, Why not make spy bug as a bug using FM transmission and recording in phone, I tried but facing problem with frequency. Why don't you make a video on that

[@greatscottlab]

I put it on my to do list

[@sanjukumar]

Bruce Lee , I don't know what is lora But I tried it using transistors and couple of passive elements. And some time it did work and later stopped working cz of frequency fluctuation or noise .

[@mhwahla]

that need an app bro :P

[@mhwahla]

iron man can you give me sketch of your work please ? it will help me in my final year project

[@mdshabaz2591]

@@greatscottlab Please do. I am doing the same project but getting only noise as output!

[@DogRox]

That was great! :-) now add Bluetooth or Wi-Fi control that way you can control it from anywhere. just leaving in somebody's house and then leave and then turn it on whenever you know their home talking hee-hee :-)

[@WildfoxFabrication]

congrats on 700K!

[@apurvaryan9671]

Finally greatscott u made a video. Now are you free from your MS program?

[@greatscottlab]

No

[@apurvaryan9671]

GreatScott! Waiting for the day to be as good as you in this field

[@EasyElectronics2412]

The code is not getting uploaded can tell me pls????

[@thomasstockem8369]

Hey GreatScott how about a DIY Sunrise Alarm clock. Or maybe even a DIY or Buy Episode about it?

[@barneman3213]

Scott Dont forget brother...there are still fm transmitters...they are as 100 years or more...

[@K2teknik.]

Almost 100 years, from around 1933

[@CornMCMais]

Im smelling some unqualified comment over here

[@barneman3213]

DUDE YOU GUYS ARE SO YOUNG AND DUMB AND FULL OF IT...IF YOU KNOW ELECTRONICS, heinrich hertz BUILT THE FIRST FM TRANSMITTER IN 1887 THEY WERE CALLED OSCILLATORS! NOW PICK UP YOUR FACE AND GO BACK TO HISTORY CLASS! BECAUSE YOU HAVE BEEN DEFACED!

[@barneman3213]

If you look even further there were several inventor the FM transmitter...GUGLIELMO MARCONI, Nikola Tesla and the list goes on...LOL! youre chatting to a geek who knows his sh**! especially when it comes to electrons...LOL! Dont let me spank ya!

[@CornMCMais]

Bro. Calm Down. I didnt even read what u said. I meant Hans.

[@sumedhburbure4173]

This was a great video. Thank you:)

[@stoneheart9679]

Arduino is Johnny Of electronics

[@systemofapwne]

You can probably keep the power consumption even lower by downclocking the arduino and pushing it into deep-sleep when not recording. In deep sleep, one can get the power consumption in the micro amp region.

[@the_analyst0]

4:50 Why did you use a swich? You could do the same thing with an if in 2 lines instead of 11

[@mdshabaz2591]

hey Scott, as your name says you are Great!

[@ArcAiN6]

Why not replace the arduino with an esp-12f, or esp32, and directly beam the recordings across the network to a local PC for storage?

[@juliusionescu4905]

Hey nice video also build this on myself. But one question whats the programm you use to record on your pc with this extrem high frequencies. Thank you

[@dimitrisoikonomou4748]

This was awesome! I always wanted to make something like that but I could'nt

[@rodrigo_dm]

Nice video as always, GreatScott never fails to deliver. The only thing that i disliked was the fact that i cant create SD card projects with good frequency of sampling and theres no explanation on hows that solved in this project. How to write on a SD so fast??

[@kgrez96]

Nice one once again! I'm thinking of adjusting this circuit to be a guitar looper pedal by replacing the mic with a signal amplifier / buffer and playing back the .wavs through an external DAC

[@zulkifluabubakar6331]

Hello, please have you tried this project and also amplifying the mic, Please I will like to know more, because am working on a similar project. Thank you

[@BikesBobbers]

some micro FPV cameras i use on tiny drones can record and broadcast medium fidelity analog video and audio at a tenth the size. they only require the camera/Tx bundle and a gumstick battery to operate, meaning its about 27g and 5-6cm^3.

[@BikesBobbers]

no, and if it's cheaper I don't see the point. I've made my own microcams before CMOS sensors had a processor and body that small, but i have no practical use for a spy bug, just a suggestion. no need to be so pretentious.

[@GlennHamblin]

How about a VOX function so it only records when there is sound, and mostly powers down otherwise. Could dramatically improve battery life.

[@sandeepk.9292]

At 0:20, shouldn't it be '1/f' instead of 'f' as the interval between two sample points in the V vs t graph? Here 'f' indicates sampling frequency right?

[@Ujwal5555]

Can you make a BMS for li-ion using arduino ?

[@greatscottlab]

It is on my to do list

[@Rocan0]

GreatScott! BMS -> big up for that ! A 12S BMS would be sooo good... Oh : put an ajustable number of battery cell !

[@Ujwal5555]

GreatScott! Thanks

[@HichamHicham-wt7dy]

This time u made a spy bug wit mic , next time do a camera, scott!😄😄😄😄

[@vishal01mehra]

3:26 Why not black wire for Ground and white for output?

[@Zhaymoor]

Thank you for the great video :D

[@avejst]

Thanks for sharing 😀👍

[@russ8001]

dumb question...looks like you need to manually initiate the recording mode by pressing a switch. For the purpose of eliminating this need, couldn't you put a circuit that activates the record mode if there is sufficient sound input volume and deactivate if there were a specified amount of time for which there was no sound over a specified input level?

[@houseofelectronics5869]

Nice Video Great Scott!! How is ur thesis going? Can you give tips to beginners in general , as to how one can start writing research papers? It seems very hard because most people don't have in depth knowledge . Any advice would be great :)

[@ABID5]

Oh ya! This is what we want

[@somaaa5554]

I have a question...How did you learn arduino programming? Did you take some kind of course or just learning from internet?

[@bsgmz]

Hi Great Scott I want to buy pcb from jlcpcb but there is high shipping cost. I am some confused. How we can buy pcb with no shippping cost. Thanks

[@bsgmz]

Its cost 2 dolar but shipping cost 13 dolar to Turkey. It is the problem. GreatScott said free shipping

[@amirsabbag9005]

Yunus Başeğmez I know I am late but I think free shipping includes USA

[@TheOrdner]

Ok, ich muss das jetzt mal fragen. Welche Textmarker und/oder welchen Drucker/Patrone benutzt du, dass dir die Schrift beim markieren nicht verwischt?! Ich kann nichts Gedrucktes markieren ohne das es verwischt und es macht mich verrückt!

[@tseckwr3783]

Keep up the great work.

[@user-yw3ry4wd2x]

I'm not sure why, but this has made me want to make a combat robot. 😂

[@AravindAnirudh595]

Loved it! 😍 Awesome

[@markoni985]

Hello Scott, did you use 5v or 3.3v Arduino pro mini?

[@greatscottlab]

+markoni985 5V. But it doesn't matter which one you use.

[@markoni985]

So the output from TP4056 (2.5v-4.2v) will not affect the performance (clock speed) of Arduino?

[@Nono-hk3is]

I've found using standalone AVR chips plus a crystal to be cheaper and smaller than using even Arduino nanos, plus an ftdi USB to serial adapter only for breadboarding. I use a pro mini as an ISP since some vendors who claim their AVR chips already have the Arduino bootloader are less than reliable in their claims.

[@anusheeltiwari]

How do you know such a wide range of things? What are your qualifications? Btw love your videos and watch them even during exams like right now.

[@ACTlVISION]

Since the STM32 has 12-bit ADCs wouldn't that be better? Also you could just use your sponsor to DIY a full PCB with all this.

[@ssematimbajoel9427]

Hi Scott, this is a good project, am interested in having an addition on your project having the wav files sent to cloud server with GSM, i appreciate advise on how to get it done.

[@akhiljoseph8360]

Hi. I was trying to make a talking tom. Is it possible this way?

[@haydenc2742]

Most of the original analog to digital signalling is 64kb/s for phone communications, 8bit x 8K sampling rate. Is the pro mini better than the nano? Very cool build!!!!!

[@greatscottlab]

The pro mini and nano achieve the same results.

[@daoneTM]

Ah, bulding an "illegale Abhöranlage"! IC :D

[@PPSRHD]

Is there a way to Not use an audrino board in this project? And can we store the audio in a SD card?

[@ziome3eg]

GreatScott! Have you tried to desolder this small mic, solder 3.5mm jack input (l and r channel connect to make mono) and connect any better mic?

[@secondsettweezer9884]

Disguise as a functioning USB charger and use that to also charge it, allowing the battery to mainly function as a backup?

[@decaybeats]

Hey Scott, could you please make a video about analog synthesizers, envelope generators or something similar? I'm trying to build a simple synthesizer on a breadboard but nothing really seems to work correctly...

[@greatscottlab]

It is on my to do list

[@decaybeats]

GreatScott! Thanks.

[@niklas8751]

Moin, wie nennt sich das Klebeband bei Minute 5:33?

[@bgarv7]

*To record all kinds of interesting recordings*

[@QuantumFluxable]

Scott wo in Deutschland bist du? :)

[@lukasschworer840]

hey scott can i ask u where u get ur prototyping pcb's from ?

[@xaviermclachlan3227]

What do you use to draw your schematics

[@moritzkoslowski5920]

Wäre es nicht simpler wenn man einfach einen kleinen FM Sender lötet und das Empfangene einfach mit dem Handy aufnimmt? Also zumindest mein Mittelklasse Android kann das... Und kannst du vielleicht mal ein Video zu so einem Minisender machen? :)