Make Oscilloscope from Bluetooth Headset

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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.
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#Inverter
#Oscilloscope
#DIY

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Опубликовано:

4 янв 2021

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Комментарии : 252

@PhdHung 3 года назад

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: Magnetron0989821611@gmail.com Phone: 098982161

@AYUSH-lc6bn 3 года назад

I also try this 👍👍👍👍

@frankwilliamabagnale8048 3 года назад

Still waiting for 310vdc to 220vac 😀

@PhdHung 3 года назад

Yes, it will appear soon

@godislove3709 3 года назад

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

@Octavio-mk5mv 2 года назад

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

@janibsoomro3440 3 года назад

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

@electronresonator8882 3 года назад

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 3 года назад

Yes, thanks, hope you enjoy it.

@H0mework Год назад

Genius! From the US, just subscribed!

@vladimirmiletiev 3 года назад

Great job! cant wait to try it.

@PhdHung 3 года назад

good luck

@Bianchi77 2 года назад

Keep it up, thanks for sharing the video :)

@cancakmakli4718 2 года назад

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 11 месяцев назад

Podrias enviar esquema mejorado gracias

@nevairdealmeidatudino444 3 года назад

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

@hendriagustian7082 3 года назад

Steady cool bro.

@starbirthcalamity 2 года назад

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

@vasantnehete3459 Год назад

very Nice . going to build one 👍

@MuhammadDaudkhanTV100 3 года назад

Sweetheart and cool content bro thanks

@Thebasicmaker 2 года назад

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

@elpidiovasquez1080 Год назад

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.

@thecrazy8888 3 года назад

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

@vasantnehete3459 Год назад

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?

@lydigital 3 года назад

Excelent project. 👍

@PhdHung 3 года назад

Thanks bro.

@carever2000 2 года назад

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?

@Herman-xq1wr 3 года назад

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 3 года назад

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

@jagadeeshapatil75 3 года назад

Frank opinion please provide limitations of this Bluetooth oscilloscope

@fury4076 3 года назад

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

@JamilKhan-hk1wl 3 года назад

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

@fury4076 3 года назад

@@JamilKhan-hk1wl thank youuu

@opium57mar09 3 года назад

Bravo mon ami 💪🙏

@electronic7979 3 года назад

Good idea

@user-nx1ww5ys1b 2 года назад

SUPER!

@liaskliask 3 года назад

Excellent !!thanks a lot!!

@martinroldan7073 Год назад

Como no se me ocurrio, que buena idea

@dessalegnenegussie2963 15 дней назад

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

@Rohitkumar-1994 3 года назад

acros which resistance you connected the zener

@katiekumcgil 10 месяцев назад

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

@AhmedAli-pu3le 2 года назад

Can I use a 3.5 volt zener instead of 3.3 volts

@PhdHung 3 года назад

Thank you for watching. Where are you from?

@yangerjmr6922 3 года назад

India

@electroman1556 3 года назад

Philippines

@Mounith.H 3 года назад

India

@mutiarakreatif1702 3 года назад

I am from indonesia. Thank's

@kdcreativity6201 3 года назад

India

@Infinity-electronic 3 года назад

NICE Project sir 👍👍👍👍

@PhdHung 3 года назад

Thanks

@uRealReels 2 года назад

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

@GiNodrog 3 года назад

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 3 года назад

max 20Khz bro

@cesarjorgemurillobarientos1813 2 года назад

Very good

@omsingharjit 3 года назад

What is the peak voltage range ??

@SLBackToLifeRepair Год назад

this can use for read laptop bios signals ?

@electroniquepassion 3 года назад

Bien 👍

@seychelles44 2 года назад

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

@mypower7853 Год назад

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

@kdcreativity6201 3 года назад

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

@PhdHung 3 года назад

@jagadeeshapatil75 3 года назад

What is that less than 3

@dannypitts2442 2 года назад

It’s a heart

@SirZeroDay Год назад

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

@dumucvietnam6425 3 года назад

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.

@chbaisla 3 года назад

U r great bro

@PhdHung 3 года назад

Thanks bro

@pranabkrdeka9018 Год назад

Wow what a idea.

@PhdHung Год назад

Thanks

@miftahq1 2 года назад

This is 10x probe?

@seefarud 7 месяцев назад

Can it be used as an electricity meter?

@rogertubal-uz2lp 9 месяцев назад

good and uniform condition

@hurrypallony6446 5 месяцев назад

А как на счёт уровня регулировки чувствительности микрофона?

@Rahul-qs8ss 3 года назад

thanks you very much sir nice

@PhdHung 3 года назад

@dadelectronicslab 3 года назад

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 3 года назад

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

@johnnytorrealba5953 Год назад

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

@arjunmishra2092 3 года назад

Great sir. From which country you are.?

@omsingharjit 3 года назад

It would be Good if you use tvs diode or MOV

@skgkstudy638 4 месяца назад

Software not available form Play Store please help me provide software

@ndkadam1869 3 года назад

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

@PhdHung 3 года назад

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

@DiyMr_Huy 3 года назад

Hay quá anh ơi 👍

@PhdHung 3 года назад

@a.araujo2847 3 года назад

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 3 года назад

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

@a.araujo2847 3 года назад

@@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.

@bat2479 3 года назад

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

@PhdHung 3 года назад

max ~ 20Khz

@heyderaliyev8976 3 года назад

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

@PhdHung 3 года назад

Yes, u can measuare 220v with probe x10

@soheilghorbani7936 8 месяцев назад

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

@yudhiemekanik1460 Год назад

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

@IrfanAnsari-vo6sj 3 месяца назад

Sir no Download Play Store but link please

@jeffro. 2 года назад

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!

@AutoTechEngineeringDHAKarachi 2 года назад

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

@Thebasicmaker 2 года назад

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

@ruhinmasruhin5076 Год назад

Bisakah untuk test tegangan tinggi macam pada tv tabung?

@mohammadalfauomey3443 3 года назад

Nice What is the highest frequency it can measure? Thanks

@PhdHung 3 года назад

max ~ 20Khz

@mohammadalfauomey3443 3 года назад

@@PhdHung Thanks

@wanfrahman Год назад

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

@masilul6409 2 года назад

Mantap boss

@qrelectronicrepair1802 3 года назад

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

@PhdHung 3 года назад

good

@empu.kw212 Год назад

Itu ide yang cemerlang

@rishad100 3 года назад

Very nice bro !!!

@PhdHung 3 года назад

Thanks bro

@rishad100 3 года назад

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

@mohalmisri1230 Год назад

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

@kamleshchavan7451 3 года назад

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 3 года назад

ok bro :D

@nandeepkhajuria2326 3 года назад

Does it work like professional one

@PhdHung 3 года назад

no :d

@HoangHaRobotviet 3 года назад

Sơ đồ mạch phân áp như nào vậy h

@ancomurg Год назад

What is the maximun frecuency that support the osciloscope?

@rudinei_do_conto Год назад

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

@ckshim4964 3 года назад

R1k short?

@gersonpsw7664 3 года назад

maximum voltage supported?

@Thebasicmaker 2 года назад

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

@jaroslawaske1214 3 года назад

How do you set the app to take sound from the Headset? For me it takes from the phone microphone only, or 3.5 mm jack wire...

@emmanuelmichael1599 3 года назад

Same problem I have here. How do I go about this?

@emmanuelmichael1599 3 года назад

Please also suggest another app that will work with this constuction

@soheilghorbani7936 8 месяцев назад

I have same problem No app

@nieldroid930 3 года назад

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

@PhdHung 3 года назад

max ~ 250V. can use DC and AC

@nieldroid930 3 года назад

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 2 года назад

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

@qzorn4440 2 года назад

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...:/

@pichitsrasrisom8118 2 года назад

แจ๋วจริงๆมีคนทำมือถือหรือทีวีเป็นเครื่องวัดไฟฟ้าได้จริงๆ ผมเคยถามตัวเองเจอแล้ว

@cristianpopescu78 2 года назад

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

@bengkel.panggilan.24.malang 3 года назад

👍👍👍

@quanghoang04 3 года назад

👍👍.cái này hay này.

@cjaviergb Год назад

Can it will be used with a pc?

@PhdHung Год назад

I think it's possible, but be careful

@nangluongxanhhongson648 3 года назад

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 3 года назад

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 3 года назад

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 Год назад

@@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

@johnfloros 3 года назад

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 3 года назад

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

@edmilsonfranco 2 года назад

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

@DIKANCS 3 года назад

How many the analog bandwidth

@PhdHung 3 года назад

max 20Khz

@minhphongauto5000 3 года назад

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 3 года назад

Same scenario

@dschannel1171 Месяц назад

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.

@gokulgopal9851 3 года назад

What is the highest voltage

@Thebasicmaker 2 года назад

He says 220 V with that voltage divider

@DestraAmni 3 года назад

Please Share skema

@subhasishbhaduri2938 3 года назад

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

@PhdHung 3 года назад

no bro.

@subhasishbhaduri2938 3 года назад

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

@erhanzeynel 3 года назад

@@subhasishbhaduri2938 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 2 года назад

@@subhasishbhaduri2938 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