multimeter using magnetic property

[sssahiloberoi]

hi

I am starting to make my own android app and my app is based on multimeter using magnetic property of cell so is there any library supporting that or i have to create a library.if I have to create a Library please i wanna learn how to create that....Please help me

 

[NJDude]

You can start by reading THIS

 

[walterf25]

Multimeter

Hi, i made an app for myself, but i used a bluetooth module, it's actually very simple, i can read the voltage on my android screen.


cheers,
Walter

 

[sssahiloberoi]

how to use a self made library

Hi
I started to create a library but its not mentioned here how to use that library,please help me out

 

[Erel]

Which feature is missing? You can read the magnetic sensor with PhoneSensors object.

 

[netchicken]

Hi Erel, just to bump this thread, we have the Library made, but linking the library back into B4A is the problem. Once you have made a library, how does it connect in to B4a.

What has to be done so it can be used in B4a? We are all stumped.

Thanks

 

[walterf25]

Multimeter

Did you create the library using this tutorial here?

cheers,
Walter

 

[sssahiloberoi]

hey i made a library using the particular tutorial given on this site but i have not got any success to detect current through magnetic field strength.

 

[positrom2]

You must check where the field sensor is located in your device. Then you have to design a coil of the right diameter and with number of windings suitable for your source to deliver a field like the earth field in some mm distance from the front end of your solenoid.
regards, positrom2

 

[sssahiloberoi]

current detection

Thanks for your reply but cant i detect current it self from my cell with out any external hardware as i m an electronics engineer and i am aware of that but i want that my cell itself would work as a galvanometer.

 

[positrom2]

Maybe you want to measure magnetic field generated by the leads to/from your cell or by the current through your cell. The field depends on the leads geometry, you have not specified. If you do not want to use a coil (thereby you could amplify the field by adding more windings) I suspect you need quite large current for a field to be detectable by the phone sensor. You have not specified any detail on what you want to do, so it is impossible to give advice.
regards, positrom2

 

[sssahiloberoi]

Thanks

I actually want to detect current as i am using magnetic sensors of my phone. As we know according to magnetism current generates magnetic field. So my idea is to detect current from magnetic field. As my phone can detect magnetic field so i want to work in opposite direction.