Make Oscilloscope from Bluetooth Headset

[@PhdHung]

Today's project, I will create an oscilloscope from a cheap bluetooth headset. You will have a bluetooth headset, A smartphone with oscilloscope software. Need 2 resistors 100K or 200K and 1K. It forms a voltage divider. 3.3V zener diode to protect bluetooth headset. The measured frequency is dependent on the quality of the headphones. However, if the frequency is below 10Khz, it works quite well. I'm not sure the software will work with all phones. If it doesn't work, try another software, find the oscilloscope on google play. If you like my video, give me a cup coffee. Thank you very much. Donate : www.paypal.com/paypalme/phdhung Facebook group : bit.ly/CreativeElectronic Contact: [e-mail] Phone: [phone]

[@AYUSH-lc6bn]

I also try this 👍👍👍👍

[@frankwilliamabagnale8048]

Still waiting for 310vdc to 220vac 😀

[@PhdHung]

Yes, it will appear soon

[@godislove3709]

Hello sir please can you tell me how mutch can handle maximum voltage peak to peak

[@Octavio-mk5mv]

Awesome, thanks for sharing, up to what frequency does that measure if I may ask?

[@electronresonator8882]

thanks a lot, tough it's simple, it actually really useful for so many people who can't afford an oscilloscope, but own a android phone

[@PhdHung]

Yes, thanks, hope you enjoy it.

[@janibsoomro3440]

Wow, never thought of this before. Excellent job there.

[@cancakmakli4718]

For ac protection, the zener diode should be connected to the circuit again in parallel but in reverse in two series. I think there is a mistake in the project.

[@JorgeRamirez-uf6qd]

Podrias enviar esquema mejorado gracias

[@PhdHung]

Thank you for watching. Where are you from?

[@yangerjmr6922]

India

[@electroman1556]

Philippines

[@Mounith.H]

India

[@mutiarakreatif1702]

I am from indonesia. Thank's

[@kdcreativity6201]

India

[@thethoughtfield]

that´s an amazing idea, wireless oscilloscope probe wow!

[@Herman-xq1wr]

gosh, I never thought about this before, thank you very much, because of your video I didn't buy an oscilloscope which was very expensive

[@PhdHung]

But it cannot replace an oscilloscope. The oscilloscope is much better.

[@jagadeeshapatil75]

Frank opinion please provide limitations of this Bluetooth oscilloscope

[@fury4076]

@@PhdHung Bro, it can use in square wave?

[@JamilKhan-hk1wl]

@@fury4076 yes it should be able to. But it only works for signal frequency less than 10khz

[@fury4076]

@@JamilKhan-hk1wl thank youuu

[@thecrazy8888]

WHY keep the cable instead of attaching it directly to the probe?

[@nevairdealmeidatudino444]

It's an amazing ideia!Thanks a lot! I'm from São Bernardo do Campo, São Paulo, Brazil.

[@Thebasicmaker]

You should use two zener one pointing the opposite of the other. Think you didn't use the other one because the microphone was polarized and you didn't detach the resistor that was powering it

[@H0mework]

Genius! From the US, just subscribed!

[@vladimirmiletiev]

Great job! cant wait to try it.

[@PhdHung]

good luck

[@sbandc]

lol When you pulled out the box of diodes stacked in bags, I felt that shit.

[@elpidiovasquez1080]

not all phones work, possibly works only on samsung 7 which has a receive bluetooth option, android phones usually are in the transmit mode which cannot receive bluetooth audio. i think bluetooth dongle with transmit mode can be used to connect to bluetooth receivers option as in samsung 7, bluetooth headphone is more complicated.

[@jeffro.]

So you got it to send a signal to the phone & o'scope app, but the o'scope is free running! That includes your actual o'scope on the shelf. Your can't measure anything like that! Do you know how to use an o'scope?! Much more useful if you set the TRIGGER level to freeze the display, to be able to actually see a waveform change over time! That way, your can see changes and make measurements. Also, if zener is going to ground on the earbud, not sure it's "protecting" the circuit. You'll need another zener to do that. However, besides these concerns, I do like the fact that you've shown ppl how to use simple tech to accomplish other things, to get ppl to start "thinking outside the box" so to speak. Thanks for that!

[@GiNodrog]

Like this as it's totally isolated. Not to clear in the video but I suppose the 3z3 is across the small resistor. I would be moor tempted to fit a bnc socket to the BTooth adapter. Just for interest what's the frequency response?

[@PhdHung]

max 20Khz bro

[@electronic7979]

Good idea

[@dessalegnenegussie2963]

U R A Nerdy Bird!!! U flying; thx!

[@MuhammadDaudkhanTV100]

Sweetheart and cool content bro thanks

[@Infinity-electronic]

NICE Project sir 👍👍👍👍

[@PhdHung]

Thanks

[@vasantnehete3459]

very Nice . going to build one 👍

[@bat2479]

Super. what maximum frequency and maximum how many volts can work?

[@PhdHung]

max ~ 20Khz

[@RixtronixLAB]

Keep it up, thanks for sharing the video :)

[@pranabkrdeka9018]

Wow what a idea.

[@PhdHung]

Thanks

[@kdcreativity6201]

Thanks bro i really need a oscilloscope (cheap one) ❤️❤️❤️❤️👍👍👍👍

[@PhdHung]

[@jagadeeshapatil75]

What is that less than 3

[@dannypitts2442]

It’s a heart

[@lydigital]

Excelent project. 👍

[@PhdHung]

Thanks bro.

[@opium57mar09]

Bravo mon ami 💪🙏

[@kamleshchavan7451]

Great idea 💡 , but sir instead of only music, explain what you're doing step by step. Similar way can you make a video on RF transmitter and receiver module explaining the circuit diagram step by step, but no background music

[@PhdHung]

ok bro :D

[@vasantnehete3459]

It only worked for first time then next time it simply refused to detect on any kind of blue tooth device. Device is connected if we reconnect microphone and speaker it also works but when I start Smart oscilloscope it doesn't work. It always respond to built-in microphone of mobile. Any clue 🗝️ in which way it can be rectified?

[@hendriagustian7082]

Steady cool bro.

[@electroniquepassion]

Bien 👍

[@mohammadalfauomey3443]

Nice What is the highest frequency it can measure? Thanks

[@PhdHung]

max ~ 20Khz

[@mohammadalfauomey3443]

@@PhdHung Thanks

[@omsingharjit]

What is the peak voltage range ??

[@nangluongxanhhongson648]

Cái này cũng rất tiện mình đã dùng bằng rắc tai nghe kể cả bằng Bluetooth Nhưng nhược điểm của nó là không đo được tần số cao, chỉ đo được 20khz đổ lại thôi, đo xung vuông của TL494 hoặc SG2535 nó tầm 25khz là không thấy xung.. Nghịch bằng tai le bluetooth thì không sợ bị hỏng điện thoại😀😀😀

[@PhdHung]

nó phụ thuộc vào chip giải mã của đt. tín hiệu âm thanh nghe đc thì dưới 20Khz thôi. cái này đo tần số thấp thì cũng chữa cháy ok. Chứ ko bằng đc osc :))

[@minhphongauto5000]

Mình cũng đã làm thử nhưng app SmartScope luôn nhận micro của điện thoại làm định, vậy làm sao để app nhận micro trên tại nghe bluetooth vậy bạn. Video clip này bịp bợm thì đúng hơn.

[@phucbhsolarv7609]

@@minhphongauto5000 bạn cho phép ứng dụng thu âm trên micro là được nhé bạn , nhiệm vụ của nó là nhận tín hiệu tần số từ micro

[@miftahq1]

This is 10x probe?

[@omsingharjit]

It would be Good if you use tvs diode or MOV

[@skgkstudy638]

Software not available form Play Store please help me provide software

[@dadelectronicslab]

Buenos días, muy buen aporte, una pregunta, me estoy iniciando en la electrónica y justamente estaba estancado por la farta de un osciloscopio y no me eran asequibles por su costo, con este podría hacer todas las aplicaciones de lugar como iniciado de la electrónica

[@pictrance]

no todas, estas limitado por el ancho de banda del receptor, no pasaras de los 4khz, se ve genial el proyecto pero poco practico, mejor compra un osciloscopio de mano, tienen mas ancho de banda

[@martinroldan7073]

Como no se me ocurrio, que buena idea

[@Rohitkumar-1994]

acros which resistance you connected the zener

[@johnnytorrealba5953]

Muy bueno pero no hay diagrama del divisor de tensión para poder armar bien el circuito

[@qrelectronicrepair1802]

I lucked out my headset pcb was through hole .super easy and my headset handled 5v without any smoke.

[@PhdHung]

good

[@qzorn4440]

sweet...:) don't tear up that good scope-probe for a few dollars buy the mating BNC connector then add your pigtail wires to that and you can change probes fast...:/

[@mypower7853]

Why my Bluetooth device mic doesn't give signal even after connecting but phone's mic does

[@liaskliask]

Excellent !!thanks a lot!!

[@carever2000]

Hi, bro. Any input voltage up to 3.3, in the phone is 3.0. Which is the relation to know the exct voltage? by example: if i have 5, 9 or 12 volts in the phone is 3.0 how i can measure de voltage. or only can measure frecuency?

[@ndkadam1869]

Sir, nice work. Can we measured bios ic signals and lvds signal in of lcd tv.thanks.pl. reply.

[@PhdHung]

I don't think it's possible, but give it a try.

[@cesarjorgemurillobarientos1813]

Very good

[@cristianpopescu78]

There are no aliens.. we are the aliens! Amazing technology ...my Goodness!

[@МаксимДор-в4п]

SUPER!

[@SLBackToLifeRepair]

this can use for read laptop bios signals ?

[@rogertubal-uz2lp]

good and uniform condition

[@mikehauk6079]

After watching the video and reading tne comments: (There is NO negativity in my comment fyi) I am compelled to comment on the failure in removing the battery BEFORE any soldering & or modifications. I feel no need in explain why one should or should not remove ANY connection of any value of a power source to such device/object. "to each their own..." It go without saying i clicked on the video because i AM interested. I very much enjoy seeing what people do or get done to work for them. Is a good video. Despite any negative feedback anyone may say, your video IS very informative. This IS a good idea that can & do & may hold a valuable purpose for person who not have the means or ability to aquire (lack of better word) a bench or lab scope.

[@minhphongauto5000]

SmartScope always choose original microphone on phone is main source, how can you set this app use microphone on bluetooth headset ??? This video is fake.

[@creativebuilder577]

Same scenario

[@dschannel1171]

Depends on phone, old phones don't have this issue, a modern phone gonna test if the connection with the electret is existing, this component has an specific impedance, if what connect on it's component place have different impedance characteristics, so this "microphone/oscilloscope" might be ignored because the impedance difference, the same happens with modern RCA connectors on modern TVs, if you connect only the audio jack and don't connect the video one, all the audio signal gonna be ignored, the same may happen if connect only the video and don't connect the audio cable, the modern circuit tests the signal connection condition. It worked well on my old Android 4.4 phone using a wire P2 earphones cable, older hardware, on my modern phone, not a chance.

[@Yumi2-l9i]

Great!! How about 2channel?

[@chbaisla]

U r great bro

[@PhdHung]

Thanks bro

[@CreativeKingVN]

Hay quá anh ơi 👍

[@PhdHung]

[@nandeepkhajuria2326]

Does it work like professional one

[@PhdHung]

no :d

[@AhmedAli-pu3le]

Can I use a 3.5 volt zener instead of 3.3 volts

[@wanfrahman]

Its not working, i have the same bluetooth, same zener and same resistor, but doesnt work, phone is samsung

[@AT_Eng]

which resistor is parallel with zener diode? 1k or 200k ?

[@Thebasicmaker]

1k since the voltage has to be divided the smaller resistor is giving a lower output voltage than the input

[@seychelles44]

Nice, can this be used with 12dc in cars?

[@katiekumcgil]

i found it hard to see the readings ,how close were the android reading to the real oscilliscope readings?

[@arjunmishra2092]

Great sir. From which country you are.?

[@Rahul-qs8ss]

thanks you very much sir nice

[@PhdHung]

[@yudhiemekanik1460]

I try this but my android mic still work....🤕🤕

[@Profesorkw]

Itu ide yang cemerlang

[@rishad100]

Very nice bro !!!

[@PhdHung]

Thanks bro

[@rishad100]

@@PhdHung bro! Can you make powerful inverter circuit using 2x mje3055t transistor ?

[@heyderaliyev8976]

Can it measure voltage mains at home which is 220 AC ... ? or is it for low voltage ..??

[@PhdHung]

Yes, u can measuare 220v with probe x10

[@a.araujo2847]

Ok, you get the waveforms. But I am wondering about the signal mesurements. How can you adjust the scale? The signal crossing a tension divisor and a bluetooth volume control... how I know if I am looking at 2V, 20V...? Its not a simply 1x/10x probe. Thank you about your video.

[@PhdHung]

This is just a simple product. It doesn't have many functions

[@a.araujo2847]

@@PhdHung It is not about "many functions" actualy, but about what you are measuring and how the smartphone see it. It's ok if you simply want to know the waveform and nothing more. But this connection (with false measurements) is almost useless. Thank you about your video. It was a interesting idea anyway.

[@seefarud]

Can it be used as an electricity meter?

[@gersonpsw7664]

maximum voltage supported?

[@Thebasicmaker]

Some mV input at the microphone connector but with the 2 resistor you can make a voltage divider

[@hurrypallony6446]

А как на счёт уровня регулировки чувствительности микрофона?

[@uRealReels]

How do I get my scope app to read input from Bluetooth or wired microphone? It only responds to cell phones internal microphone

[@soheilghorbani7936]

Hi I made it but didn't work even didn't start Second problem is that smart scope app. Just work with phone mic and it seems you had same problem in video Please help me with schematic and app Thanks

[@ruhinmasruhin5076]

Bisakah untuk test tegangan tinggi macam pada tv tabung?

[@gokulgopal9851]

What is the highest voltage

[@Thebasicmaker]

He says 220 V with that voltage divider

[@DIKANCS]

How many the analog bandwidth

[@PhdHung]

max 20Khz

[@mohalmisri1230]

Why not use the phone external speakers right way,I want an oscilloscope to use with metal detectors if I convert my Bluetooth headphones like you why I need the 2 probes for metal detectors frequency test

[@dumucvietnam6425]

cậu hướng dẫn mình cách kết nối phần tai nghe không dây với,mình thử mãi nó không kết nối được mà chỉ sử dụng được mỗi mic trong điện thoại.

[@kdcreativity6201]

You have lots of games😂😂😂😂😂🤣🤣🤣

[@PhdHung]

Oh, no, I don't play games.

[@SirZeroDay]

I cant see you connect zener with 1k to gether or 200k ?!

[@sajidmohammad3190]

I will use a optocoupler for better safety.

[@pichitsrasrisom8118]

แจ๋วจริงๆมีคนทำมือถือหรือทีวีเป็นเครื่องวัดไฟฟ้าได้จริงๆ ผมเคยถามตัวเองเจอแล้ว

[@masilul6409]

Mantap boss

[@DestraAmni]

Please Share skema

[@ancomurg]

What is the maximun frecuency that support the osciloscope?

[@rudinei_do_conto]

20Hz a 20Khz, a faixa de frequência do áudio.

[@johnfloros]

Μy bluetooth mic is not working even it is conected. It only pics up sound from the phones mic. How can i change this?

[@PhdHung]

Maybe your phone doesn't support it :( . Try another oscilloscope software

[@edmilsonfranco]

Amigo para funcionar não retire o microfone original Sempre que for usar tera que ficar em silêncio

[@4yaprakllonca658]

two channel ?

[@IrfanAnsari-vo6sj]

Sir no Download Play Store but link please

[@engabdsy2431]

Nice Im try this but this program can't support blotooth mic

[@engabdsy2431]

Can you help me?

[@engabdsy2431]

The Headset conected but dont send sound to phone

[@AhmedAli-pu3le]

Can I use a 4 volt zenner instead of 3.3 volts

[@AhmedAli-pu3le]

Can I use a 3.5 volt zener instead of 3.3 volts

[@Thebasicmaker]

@@AhmedAli-pu3le I think you can. The zener will cut any higher voltage to 4 Volts instead than 3.3V

[@HoangHaRobotviet]

Sơ đồ mạch phân áp như nào vậy h

[@dotancohen]

7:50 Did somebody flush?

[@Chor_Ultra_Pro_Max]

Can this device measure high frequency signals? Like >20KHz???

[@PhdHung]

no bro.

[@Chor_Ultra_Pro_Max]

Ok, can you show how to measure high frequency signals with phone like that, I don't have money to buy an oscilloscope...

[@erhanzeynel]

@@Chor_Ultra_Pro_Max for frequency> 10khz you can build your own scope with faster ADC chips but at the end diy cost will be 2x of a traditional scope.

[@Thebasicmaker]

@@Chor_Ultra_Pro_Max the phone has a filter cutting all Higher frequency to ensure a better audio quality i Think, or simply the audio circuits wont go higher that that

[@cjaviergb]

Can it will be used with a pc?

[@PhdHung]

I think it's possible, but be careful

[@nieldroid930]

Great, what is the max range volts can it test? Is it for DC only?

[@PhdHung]

max ~ 250V. can use DC and AC

[@nieldroid930]

Great to hear that, thank you. Cause I was planning to make probe directly to headset jack but I hesitate to make one cause I dont want to break my phone, now I will make it wireless just for the safety. I can't afford to by new phone. Hihihi. More power to your channel.

[@Thebasicmaker]

@@PhdHung ac and DC? There is not capacitor between micropone input and the AD converter of the earpiece?

[@muruganuoorkavalan9687]

Hi Im Indian

[@PhdHung]

hi bro

[@bussidmoonmidnight9232]

i think you are 1 week in 1 video

[@PhdHung]

Yes, I am very busy lately. :D

[@bengkel.panggilan.24.malang]

👍👍👍