Make Oscilloscope from Phone

The oscilloscope is an expensive device, It displays the change of an electrical signal over time, with voltage and time as the Y- and X-axes, respectively, on a calibrated scale. The waveform can then be analyzed for properties such as amplitude, frequency, rise time, time interval, distortion, and others. However, not everyone has enough money to buy it. Today, I will build an oscilloscope from my samsung android phone. I use 2 resistors 1K and 10K to form a 10: 1 voltage divider circuit. It helps the phone measure about 20V. With a maximum frequency 20Khz. Be careful, High voltage can damage your phone. I will not be responsible for any damage.
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#Inverter
#12Vto220V
#oscilloscope

[@PhdHung]

Facebook group : bit.ly/CreativeElectronic Today, I will build an oscilloscope from my samsung android phone. I use 2 resistors 1K and 10K to form a 11: 1 voltage divider circuit. It helps the phone measure about 20V. With a maximum frequency 20Khz. Be careful, High voltage can damage your phone. I will not be responsible for any damage.

[@f.t.w8645]

I love it when they post videos, and not say a word.

[@hpvide]

😂😂

[@WCERPE]

Ola, gostei muito do projeto; mas montei e nao funcionou. 😞 seria problema do celular? tem alguma marca especifica?

[@alaveuglette274]

Hello. I've try, but the screen stay on the Mic mesurement ! What is the mystake ?? I've try different apps. Same results.

[@cometa792007]

Question, the oscilloscope test is performed on a transformer. But it is AC that voltage and current is measuring. I do not think that a few simple resistors attenuate the current and voltage would burn the phone

[@mirarzaamplification902]

Based on the diagram it is connected to a microphone pin of a jack. And a microphone produce an AC signal thats why it reads ac mains which is 50hz or 60hz and it is inside the audio frequency spectrum. I think he uses low power transformer maybe thats why it only have a maximum of 20V, I just don't know if it is peak-peak or peak-zero point.

[@dineshvyas]

@@mirarzaamplification902 what is love power transformer?

[@mirarzaamplification902]

@@dineshvyas hahaha sorry, what I mean is lower power transformer. Typing error.

[@patrickfle4485]

Upper freq of bandwidth is about 20 khz and I suppose lower freq is not 0hz, so, to what frequency value can the non-continuous AC signal drop?

[@Tx_6969]

The 1K resistor is getting Super hot at 12v 1A. Can I use only the 10K resistor?

[@주재철-v4m]

1k , 12v 1A , 12V÷1000 ohm= 0.012A , its only 12mA 12V× 0.012A = 0.144W. The 1K resistor will not super hot, I think

[@lymmentrixprofessional]

You have just killed electronic, this is the best thing ever, I really really love it , thanks sir.

[@danielemencucci9931]

If i use 100k e 1k resistor can i test 230v AC 50hz directly?

[@wokoteknik7935]

master for an oscilloscope that uses an android phone, what equipment should we buy?

[@ehnehm]

What mat do you use on your table?

[@blueunicorn807]

But sir when I am trying to measure astable multivibrators then it's not working, can you help??

[@PhdHung]

Try downloading another software.

[@hustlaz2k]

hi... can we directly test the probe on 240vac or higher?

[@PhdHung]

No, the maximum voltage is 20V. if it is bigger, it will damage your phone.

[@patrickfle4485]

At 12'02" and at 12'28" why frequency displayed on phone is 100Hz instead of 50 Hz (AC power line) as on the oscilloscope ?

[@CreativeHRM]

make oscilloscope very simple in my channel please see

[@patrickfle4485]

​@@CreativeHRM see what ? The frequency on phone is wrong probably due to a bug in AR Oscilloscope application. Sometimes, the horizontal time base works badly.

[@kwhp1507]

Maybe it’s measuring the positive and negative peaks? I am not familiar with these cheap scope apps

[@patrickfle4485]

@@kwhp1507 such a case would be to ignore what a frequency is. I would rather look for a big bug in the management of the time base.

[@danielemencucci9931]

Why at minute 2:07 the frequency of the tested network signal is not 50 or 60 hz but 100hz then it passes to 500 and finally to 51?

[@rishavroy2150]

Did you noticed that your application setting was bluetooth one and was disconnected too so is it possible to do so without turning it to microphone mode. You are playing the demo one.

[@skytek88]

Because it's fake jahahhaha

[@jesu123ful]

This are used to mesuarment of ac 230 volt?

[@zhuzzir]

Err... May be i m missing something, but is there any max voltage or current when testing?

[@PhdHung]

max 20V input

[@tinkerman9525]

Even higher than 20v. If you needed to be told how it is better to with held the info.

[@mikeisbell1771]

What app are you using. It looks like ar-oscillscope. It won't work on external microphone. Any help is appreciated Thank you.

[@jdelectron]

Please tell me version of app Current app is not available as this version

[@PhdHung]

Search oscilloscope on google play

[@KeuCell]

with this project i can do pwm pulse test?

[@georgebadea4138]

How happy I was... Meanwhile I got to remember that my phone have not a microphone jack 😂😂😂

[@MegaTechno]

Use a Bluetooth mic

[@mypower7853]

Please suggest that how can we use it for higher voltage nearly 200-250v

[@dreadwings3]

Is it possible to measure signals smaller than 1 V?

[@PhdHung]

ok, u can

[@munirgamani]

Is it safe for mobile how much voltage input

[@PhdHung]

max 30 40V bro.

[@dulasl1165]

i measured 3v dc and 12v dc its not showing.why

[@Khwartz]

Hi. How could we register a slow (like a little change every second, not necessarily sinusoidal) evolution of Resistance of a Circuit through Time with this system please?

[@dandelczeg8499]

Yhy site if you buyed the rsistors?

[@lovelifeandunity1533]

Impressive!!..thank u for sharing ur ideas... Bdw is it possible to check the microcontroller pulses around 3-5V with the same resistance value or should I use resistors of lower value...?

[@joshuamacdonald4913]

I have tried making the leads twice and no luck. The app won't detect in the phone.

[@kshitezroshan8021]

is it accurate. what is the error percentage

[@electronresonator8882]

how can I raise the maximum voltage to 220 volt?, what resistor should I use? how about 1K and 200K resistor?

[@PhdHung]

I don't think that is a good idea. Just a small mistake will destroy your phone.

[@ronen124]

You can try using probe x100 it will attenuate the signal drastically yet as the author of this demonstration said: it might not be a good idea putting your phone on the line here. Also I take no responsibility if you destroy your device or hurt yourself if you follow suit whatsoever.

[@narendravishwakarma6956]

Why not use a 220 to 12v transformer for the same

[@ronen124]

@@narendravishwakarma6956 it is clumsy, unaccurate and will not measure DC high voltage at all 👍😆😃

[@narendravishwakarma6956]

@@ronen124 calibrate it on a printed chart for accuracy and question was for 220 volt, I.e. in india , generally 220v is asked as 220v AC for which transformer is safe to use in practice... After all its a virtual Oscilloscope, not a regular one

[@mastercat]

works on any phone?

[@desertwarrior7104]

Thanks but 12v ac maybe is damaged your phone..?

[@PhdHung]

Yes, be careful

[@ledmarcos88]

serve para testar saída pwm de osciladores de inversores ?

[@PhdHung]

Maximum frequency is only 20Khz. Probably not

[@aperteoverde6254]

EU PENSO QUE 60HZ DARÁ SIM

[@DanShepherd72]

The app looks good, but it was a bit worrying how you demo with a live transformer and loose wires dangling around that almost were going to short out if you didn't push them apart. This is why i prefer to work only with low voltages and don't open up transformers - personally, stay safe!

[@emilvladoiu91]

What a nice joke,it should call: How to blow your phone 😂😂😂😂

[@PhdHung]

:))

[@federicobortoli3226]

It work, i use It with a 1k-100k resistor to increase the voltage input, i use It for audio purpose but It work.

[@PainStreakGamingYtAJtojbbros]

Till how much Voltage can it handle

[@inayathali1196]

Good, but which phone model this working

[@PhdHung]

most android phones

[@Salman-l1r2l]

Sir this smart phone just next to you as running led display, I need this app

[@alialipoor511]

Thanks for your training. Can we see the charge and discharge diagram of the capacitor with this device? please guide me.

[@vivianefleury2744]

On a samsung j5 android 6.0.1, the message "a problem occurred while parsing the package" is displayed when i want to run apk. Is it possible to use a compatible version?

[@PhdHung]

Use a lower version

[@CreativeHRM]

...make oscilloscope very simple in my channel please see

[@clementyeo1942]

After plug in with 2 resistors. The phone still using internal mic as cannot detect the external mic (plug in with 2 resistors)

[@PhdHung]

What do you use your phone?. My phone uses an external Microphone.

[@dharmalingeswarparasa1609]

@@PhdHung Hi, thanks for your great technique. I too had the same issue, but I figured out that, for mobile to switch to external microphone, the impedance should be in specific range i.e, about ( 1k - 1.5k) but the value may differ with different mobiles. For me, 1k didn't working but 2k worked. (2/12 ratio). Thankyou.

[@highlandwind47]

Tôi biết bạn là người Việt. Chúc bạn nhiều thành công. Tôi làm giống bạn nhưng không đo được bằng que đo nó chỉ đo được âm thanh thôi mặc dù cắm vào máy đã nhận phone

[@really4132]

What is the blue and the gray one ??

[@bashiralao9172]

Hi homemade. I tried this project, but it's showing me a square wave instead of a sine wave signal. Any idea what is wrong, I even tried changing the resistor value but there isn't any sine wave output

[@PhdHung]

This project uses the phone's audio chip, each phone has a different audio chip, so it probably won't work with all phones.

[@7d_alsaief51]

V good but , thats part its not clear ( is that transformer )? Can you explain it by any way plz ??

[@PhdHung]

The maximum voltage that can be measured is 20v. It cannot measure the waveform of a 220V grid. So I use transformer 220V to 12V.

[@mauriciotoro4744]

Can you do me a favor? What happens is that your video is a guide to an experiment of a subject for my university. Then I need what materials you use. I already have the resistances but I don't know what the other materials are. You sneak me please and thank you.

[@udisami9856]

replace 1k with 10k, 10k with 500k and add another 500k between ground wire and headphone jack and voila! you can measure mains voltage.

[@PhdHung]

I don't think that is a good idea. Just a small mistake will destroy your phone.

[@udisami9856]

@@PhdHung Agreed. Not for amatures.

[@malingeorgiev2962]

How do you make divider 10:1 with resistors 1K and 10K? Picture on 3:14 show devider 11:1 :( It will work but will show wrong values for voltage..

[@CreativeHRM]

make oscilloscope very simple for mobile in my channel /// please see

[@skytek88]

Because it's fake jehehee

[@conradvandien3495]

What phone app did you use?

[@alexanderariasjimenez9168]

Lo hise pero no funciona como deveria porq la escala de voltaje es la misma si mide uno 5 voltios q 12 voltios

[@michaelraj873]

Very nice....What are the mobile application you used

[@PhdHung]

i use AR-Oscilloscope

[@michaelraj873]

Thank you

[@studio4598]

Good 👍 เยี่ยมมากครับต้องทำไว้ใช้บ้าง ❤️

[@CUCARACHA707]

The "AC" Voltage on the "INPUT" not burn the Cellphone..??

[@mohammadalfauomey3443]

Thanks What is the maximum frequency it can measur?

[@PhdHung]

max 20Khz

[@mohammadalfauomey3443]

@@PhdHung Thanks

[@taicodien1990]

Thú vị quá nhỉ.. nếu làm thành công rồi mà đi đo mấy xung nhọn như inverter có điện áp vài trăm vôn thì liệu có hư điện thoại k a

[@PhdHung]

Max input 20v thôi à.

[@taicodien1990]

Có cách nào để nâng cao ngõ vào dc không a

[@PhdHung]

Thay trở lớn hơn, nhưng cũng nguy hiểm lắm. Lỡ chạm cái thì tèo dt ngay. Đo mấy cái tín hiệu thấp thôi.

[@taicodien1990]

Vâng tại thấy cắm vào màn hình là thấy k ổn rồi

[@michaeljoshuamanallo1742]

Can it work with vivo 2015??

[@sergiomosquera2479]

It is bealtiful . That´s very good. But here in my country the imports they bring from China are not even good for exchange. Only the old components are reliable.

[@PhdHung]

[@elecrticityelectronics8591]

Hey. Nice job. What is the maximum frequency it can measure?. Thank you.

[@PhdHung]

max 20Khz

[@elecrticityelectronics8591]

@@PhdHung did you test it for higher frequencies.. non audible frequencies.. 100 khz for instance... because the electronics inside may handle higher frequencies... thanks again... i'm interested in making one like this...

[@zhuzzir]

I belived it depends on phone's DAC, the better one like in VIVO model would surely be able to handle higher freq while the low n mid ranges phones would only be able to handle standard audio freq (20hz-29khz) unless u r lucky when yr phone manufacturer used better DAC but try at yr own risk thou.... 😜

[@elioalcala4371]

@@zhuzzir I might You an LG v30 has special dutch DAC ?can I get 915 Mhz Radio feq ? I need to measure lorawan Antenna What do You think?

[@zhuzzir]

@@elioalcala4371 sorry bro, no idea myself 🙏

[@tonysfun]

What software did you installed on the phone? Thanks. Also, I was looking at your Facebook page, but could not find any information on this project there. Thanks for sharing!

[@PhdHung]

pls Find oscilloscope on Google play.

[@lawalmohammed83]

Great work done!please Sir what brand of sumsung phone did you use?

[@tonysfun]

@@lawalmohammed83 Sorry for late response, (Corona virus visited here!), Samsung A10 - inexpensive phone from TracFone service). Before that I also tried it on other phones from TracFone, like Motorola, LG and some others I can't remember the name.

[@tonysfun]

@@PhdHung Sorry for late response, (Corona virus visited here!) Yes, I found it, but none are exactly like yours - I think Google hides versions that would not run on my inexpensive phone and or OS version number.

[@inequitas]

just updated android with April's security update and AR-Oscilloscope has stopped working

[@animalzone2611]

Jo app use kartay ho us ke link de diya karo please

[@djisydneyaustralia]

So simple , very very clever

[@electronic7979]

Nice project

[@PhdHung]

Thanks. Have a nice day

[@vipinckty1]

This is what i really looking for... thank u very much my friend... 🥰

[@PhdHung]

[@nourddin1692]

شكرا جزيلا.

[@jeka_1342]

Все былобы хорошо еслиб указанная программа работала а так пришлось искать похожую прогу

[@Mainak908]

it can't check 220 ac frequency. How to check that?

[@saad24000]

with 100K resistr

[@dreadwings3]

Wow, more one subscriber from Brazil.

[@PhdHung]

[@brian_robotic4890]

Hello, it is safe to put 12 volts arteries to the microphone input of the phone

[@elyesgrati]

No

[@gastonvillarino]

Excellent! TY! Can I measure a maximum wave 20 volts?

[@eltongjini6375]

Hello, u can make power supply 12v dc to +- 75 volt 20-30 amp constant voltage with ferrit core ee55 (55-28-21) i need to make this supply for my power amplifier 1200 watt output in bridge 8 ohm with final transistor mjw21196-mjw21195 28 pcs. Thank you for all🙏

[@PhdHung]

(75Vx2) x 30A ~ 4500W. You need to use 60VDC voltage and 4 EE55 cores.

[@eltongjini6375]

Im traying to make with that transformer ee55 with your driver circuit sg3525 but i dont know the primary turns for input 12v dc push pull circuit. Please u can help me with anything you know

[@stingray1951]

I am struggling to convert music to speech. ( Instructions /description ?)

[@perinoveriza1658]

May i know app name ?

[@PhdHung]

Find an oscilloscope on google play

[@shinekollara]

Very nice and creative

[@PhdHung]

Thanks

[@MrBobWareham]

love your displat where did you get it as I have just joined

[@cesarjorgemurillobarientos1813]

Very good master

[@josvannut8268]

just what I needed, thank you very much for sharing, again ;-)

[@PhdHung]

Thanks. Have a nice day

[@주재철-v4m]

NOW, I NEED OSCILOSCOPE BECAUSE OF MOTOR SUPPLIED VOLTAGE WAVE CHECK.... SO, I NEED IT. YOU SHOW ME THE SOLUTION.....THANKYOU VERY MUCH!!!!!!!.....

[@خالدباشميل-ب9و]

how match frequency can drawing

[@fabioknob9321]

Thanks a lot, my old Philips osciloscope broked, thats greater soluction

[@AmanKhan-ec6lg]

How many frequency (hz) i can check with this??

[@PhdHung]

max 20Khz

[@AmanKhan-ec6lg]

@@PhdHung you did not mention the software you used... Can you share the link of software??

[@lkhoatinqn]

Rất hay admin. Chỉ sợ chích bậy banh cái đt liền

[@PhdHung]

chích áp thấp thôi. Dưới 20V là ko vấn đề gì

[@mustafaderman6847]

Cok uzun zamandir aradigim video thank you

[@PhdHung]

Thank you for watching.

[@soneroflaz7246]

Uyguladınmı peki bende yapmak istiyorum. Birde uygulamanın adı nedir acaba

[@mustafaderman6847]

Benim telefonum Lg G4 kronik olarak kulaklik girişleri arzasi oluyor bu yüzden uygulayamadim Uygulamanın adı Ar-Osciloscope Ama calisacagindan eminim diyebilirim.

[@bahattinsargn5687]

@@mustafaderman6847 Evet denediniz mi beyler ? Bir tane telefonum var ve denemeye tırsıyorum. Yakarsak büyük sıkıntı.

[@mustafaderman6847]

@@bahattinsargn5687 henuz denemedim ama cok yerde araştırdım dogru dirnceleri kullanirsan sıkıntı olacağınız düşünmüyorum

[@mdhafizurrahman8260]

What is the frequency displayed in this apps?

[@faasams]

Max 20khz

[@PhdHung]

yess, Max 20Khz

[@mdhafizurrahman8260]

thanks

[@t.nitheesh5898]

Bro how much is the highest voltage and current we can measure.

[@LabArlyn]

400v 🤣

[@hassangamer1035]

We can measure all the highest voltage rating of different categories

[@cartoon_abed]

عمل جميل .. ثابر الى الامام

[@PhdHung]

I don't understand.

[@davidcromapix9083]

Excellent .

[@sadiqkhan-mf1gt]

Very Nice Work

[@PhdHung]

Thanks . Have a nice day

[@klsonidhanla]

Very nice dear brother 👍👍 What is your country name friend??

[@PhdHung]

That is my serect :)

[@klsonidhanla]

@@PhdHung no problem dear. I am made a pure sine wave solar inverter working fine but I want to your support for best results.

[@madeintanzania2995]

@@PhdHung 🤣🤣🤣🤣🤣, that is your secret 😆😆😆😆😆😆

[@KinhKha-lm2zl]

anh chưa hiểu cái clip này chắc để xem lại....he he he ...hôm nhậu say quá sáng 8h30 mới dậy

[@PhdHung]

KKK. Thấy anh nhậu suốt, thích nhể :3

[@henryrobinson9837]

actually a good video ill try it out,but im goin use a premade microphone end that has 4 terminals on it,

[@اسامةالنجمي-ظ1س]

هههههههه غلطة واحدة وتفجر الدنيا كلها

[@EEEProjectSolutions]

99Hz? why are you not using here your digital osciloscope?

[@anekaelectronic1127]

good 👍🏾

[@ithaajja5724]

how to measure 32Khz ?

[@gsmphonerepair5545]

Thanks man for this video. 👏👏👏👏👏👏👏👏👍☺☺☺

[@mirza11jee65]

Good project Thanks

[@PhdHung]

Thanks

[@idribbledonyou]

Outstanding. SImple and easy to replicate. Thanks