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 жыл бұрын

I also try this 👍👍👍👍

@frankwilliamabagnale8048

3 жыл бұрын

Still waiting for 310vdc to 220vac 😀

@PhdHung

3 жыл бұрын

Yes, it will appear soon

@godislove3709

3 жыл бұрын

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

@Octavio-mk5mv

2 жыл бұрын

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

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

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 жыл бұрын

Yes, thanks, hope you enjoy it.

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

Жыл бұрын

Podrias enviar esquema mejorado gracias

Great job! cant wait to try it.

@PhdHung

3 жыл бұрын

good luck

Thank you for watching. Where are you from?

@yangerjmr6922

3 жыл бұрын

India

@electroman1556

3 жыл бұрын

Philippines

@Mounith.H

3 жыл бұрын

India

@mutiarakreatif1702

3 жыл бұрын

I am from indonesia. Thank's

@kdcreativity6201

3 жыл бұрын

India

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

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

Genius! From the US, just subscribed!

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.

Keep it up, thanks for sharing the video :)

Excelent project. 👍

@PhdHung

3 жыл бұрын

Thanks bro.

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

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

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

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 жыл бұрын

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

@jagadeeshapatil75

3 жыл бұрын

Frank opinion please provide limitations of this Bluetooth oscilloscope

@fury4076

3 жыл бұрын

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

@JamilKhan-hk1wl

3 жыл бұрын

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

@fury4076

3 жыл бұрын

@@JamilKhan-hk1wl thank youuu

Sweetheart and cool content bro thanks

Bravo mon ami 💪🙏

Steady cool bro.

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?

Good idea

very Nice . going to build one 👍

Como no se me ocurrio, que buena idea

NICE Project sir 👍👍👍👍

@PhdHung

3 жыл бұрын

Thanks

Excellent !!thanks a lot!!

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?

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 жыл бұрын

max 20Khz bro

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

@PhdHung

3 жыл бұрын

@jagadeeshapatil75

3 жыл бұрын

What is that less than 3

@dannypitts2442

2 жыл бұрын

It’s a heart

SUPER!

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

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

What is the peak voltage range ??

acros which resistance you connected the zener

Bien 👍

Can I use a 3.5 volt zener instead of 3.3 volts

U r great bro

@PhdHung

3 жыл бұрын

Thanks bro

Hay quá anh ơi 👍

@PhdHung

3 жыл бұрын

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

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!

Very good

thanks you very much sir nice

@PhdHung

3 жыл бұрын

Wow what a idea.

@PhdHung

Жыл бұрын

Thanks

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 жыл бұрын

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

this can use for read laptop bios signals ?

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.

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

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

@PhdHung

3 жыл бұрын

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

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

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

Great sir. From which country you are.?

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

@PhdHung

3 жыл бұрын

max ~ 20Khz

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

@PhdHung

3 жыл бұрын

good

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

@PhdHung

3 жыл бұрын

Yes, u can measuare 220v with probe x10

It would be Good if you use tvs diode or MOV

А как на счёт уровня регулировки чувствительности микрофона?

good and uniform condition

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 жыл бұрын

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

@a.araujo2847

3 жыл бұрын

@@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.

This is 10x probe?

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

Can it be used as an electricity meter?

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...:/

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

@Thebasicmaker

2 жыл бұрын

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

Nice What is the highest frequency it can measure? Thanks

@PhdHung

3 жыл бұрын

max ~ 20Khz

@mohammadalfauomey3443

3 жыл бұрын

@@PhdHung Thanks

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

Very nice bro !!!

@PhdHung

3 жыл бұрын

Thanks bro

@rishad100

3 жыл бұрын

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

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 жыл бұрын

ok bro :D

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 жыл бұрын

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 жыл бұрын

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

Жыл бұрын

@@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

What is the maximun frecuency that support the osciloscope?

@rudinei_do_conto

Жыл бұрын

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

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

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

Itu ide yang cemerlang

Software not available form Play Store please help me provide software

Mantap boss

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

Does it work like professional one

@PhdHung

3 жыл бұрын

no :d

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

@PhdHung

3 жыл бұрын

max ~ 250V. can use DC and AC

@nieldroid930

3 жыл бұрын

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 жыл бұрын

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

Bisakah untuk test tegangan tinggi macam pada tv tabung?

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

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 жыл бұрын

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

@emmanuelmichael1599

3 жыл бұрын

Please also suggest another app that will work with this constuction

@soheilghorbani7936

9 ай бұрын

I have same problem No app

👍👍👍

maximum voltage supported?

@Thebasicmaker

2 жыл бұрын

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

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 жыл бұрын

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

@edmilsonfranco

2 жыл бұрын

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

👍👍.cái này hay này.

Sir no Download Play Store but link please

You have lots of games😂😂😂😂😂🤣🤣🤣

@PhdHung

3 жыл бұрын

Oh, no, I don't play games.

Sơ đồ mạch phân áp như nào vậy h

How many the analog bandwidth

@PhdHung

3 жыл бұрын

max 20Khz

What is the highest voltage

@Thebasicmaker

2 жыл бұрын

He says 220 V with that voltage divider

แจ๋วจริงๆมีคนทำมือถือหรือทีวีเป็นเครื่องวัดไฟฟ้าได้จริงๆ ผมเคยถามตัวเองเจอแล้ว

👍👍👍👍👍👍👍

@PhdHung

3 жыл бұрын

@AYUSH-lc6bn

3 жыл бұрын

@@PhdHung 😏😏

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 жыл бұрын

Same scenario

@dschannel1171

2 ай бұрын

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.

7:50 Did somebody flush?

I will use a optocoupler for better safety.

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

@PhdHung

3 жыл бұрын

no bro.

@subhasishbhaduri2938

3 жыл бұрын

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 жыл бұрын

@@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 жыл бұрын

@@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

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

@engabdsy2431

2 жыл бұрын

Can you help me?

@engabdsy2431

2 жыл бұрын

The Headset conected but dont send sound to phone

R1k short?

Can it will be used with a pc?

@PhdHung

Жыл бұрын

I think it's possible, but be careful

zenner3v3 có tác dụng gì v bác

@PhdHung

3 жыл бұрын

tránh chết con tai nghe đó

two channel ?

Cầu phân áp đấu như nào vậy

@DuyLe-uo5jp

3 жыл бұрын

hình như 1k vào mass. 200k vô que đo