Homemade Oscilloscope for Smartphones and Tablets

[@jean-mariegarcia2168]

The formula is not correct (video 0:35). The correct one is : Vout = Vin x R1/(R1+R2)

[@n.e.c.o-en7717]

Thanks

[@AndyMcGeever]

@@n.e.c.o-en7717 It might work now...

[@BaronRosenhein]

Another question about the capacitor. What is its main purpose? Is it correct to assume that you created and RC filter by introducing that capacitor to limit the frequency response of the signal? Is that the reason we see how capacitor charges and discharges instead of the square wave signal (kzbin.info/www/bejne/kKixlmuves-drtE)?

[@Evgeniy.17]

Привет ! Ну и как узнать, какое напряжение у подключенного сигнала ? Нельзя как то отградуировать шкалу осциллографа ?

[@Surferant666]

How to measure current and 240v AC?

[@wacongaissam776]

Give me an easy diagram of the metal detector in the phone

[@eduardoalmeida3593]

in the video you show capacitor range 0,1 uF to 1uF, but in subtitlte you show 0,1 mF to 1mF. Have you used micro or mili Faraday?

[@n.e.c.o-en7717]

this is my mistake sorry! micro Farad !

[@riloariichoariicho884]

How about making multimeter video

[@n.e.c.o-en7717]

In my channel i have multimeter build video

[@ashash1771]

When I open Osc on program I no have line like you but I have waves of my sound and anther sounds around me what I do ?

[@n.e.c.o-en7717]

Do you conect MiniJack to your zmartphone or you just try it without a MiniJack?

[@ashash1771]

N.E.C.O-EN yes I connect mini jack

[@ashash1771]

N.E.C.O-EN I bought program every thing is ok but osc I no have line

[@n.e.c.o-en7717]

@@ashash1771 but when you speak the line is there? You have some wave when you make some noise?

[@ashash1771]

N.E.C.O-EN Yes , It measure Thank you

[@mrakjunior]

Cool

[@n.e.c.o-en7717]

Thank you for your comment!

[@nordin5048]

شكرا جزيلا .

[@AndyMcGeever]

One obvious problem.. The frequency of the generated tone is not the same as the frequency shown on the scope. Therefore.. It doesn't work.

[@nickloss2377]

saw that too. this wouldn't be good for any meaningful diagnostics. Problem could be the mistake in his formula, or the quality of the DIY assembly/budget phone hardware. Shows promise tho. Can def. be used for diagnosis for hobbyists... ie: checking duty cycles on an Arduino

[@AndyMcGeever]

@@nickloss2377 It would definitely differentiate between AC and DC. There is hope..

[@johnlir6828]

Does this app works with bluetooth connection with an arduino device in order to avoid the wired connection of the mobile phone?

[@n.e.c.o-en7717]

Yes, multimeter part work by bluetooth connection (wireless) but oscilloscope part work by connecting to smartphone MiniJack 3.5 mm

[@johnlir6828]

N.E.C.O-EN Thanks.

[@lamaratsitsagi2352]

What a maximum frequency of oscilloscope?

[@GaneshKumar-rz4dh]

Maicrotek 3kva 96v service manual in hindi. Online upd

[@newelectricaleasy4274]

Capasitor tipe

[@n.e.c.o-en7717]

you can use a capasitor from 0.01mF to 1mF it just for protect your smartphone from DC current.

[@newelectricaleasy4274]

N.E.C.O-EN thank

[@dedskin1]

Square Signal LOL

[@n.e.c.o-en7717]

What do you mean?

[@dedskin1]

M8 it doesn't look like anything resembling a Square Wave kzbin.info/www/bejne/kKixlmuves-drtE , but im an electrician , i know why that is , its an audio amplifier , in other words its slow , like WW Golf , Oscilloscope would be in this case ,super car . It can swing real fast and show the square . While Audio Amplifier can not even output that signal let alone take that input and amplify it , so its both devices responsible for the shape of the wave . At least if im correct and im usually spot on .

[@kellynorman7452]

This is a in tutorial lol 🤣 no what this is, is a joke this doesn't tell me anything

[@Marcinoo-xd4kq]

Shit!Not worked!

[@ioannisypatidis9170]

It doesn't work!