Matronics Email Lists :: View topic - Oscilloscope for Android Phone

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Oscilloscope for Android Phone

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

sam.marlow

Joined: 25 Feb 2006
Posts: 99

Posted: Sat Dec 19, 2015 6:49 am Post subject: Oscilloscope for Android Phone

Has anyone heard of or have any experience with one? I have noise in my 

system somewhere, that is throwing off my EFIS and A/P systems.

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

rlborger(at)mac.com
Guest

Posted: Sat Dec 19, 2015 7:22 am Post subject: Oscilloscope for Android Phone

Sam,



I’m not exactly sure what your question is.



Do you believe your phone is causing the offending noise?



If so, do you have a plug-in USB charger for your phone installed in your aircraft?



Blue skies & tailwinds,

Bob Borger

Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).

Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

3705 Lynchburg Dr.

Corinth, TX  76208-5331

Cel: 817-992-1117

rlborger(at)mac.com



On Dec 19, 2015, at 8:35 AM, Sam Marlow <sam.marlow(at)roadrunner.com> wrote:






Has anyone heard of or have any experience with one? I have noise in my system somewhere, that is throwing off my EFIS and A/P systems.

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

ron228rj(at)gmail.com
Guest

Posted: Sat Dec 19, 2015 7:38 am Post subject: Oscilloscope for Android Phone

He is talking about an app to turn a phone into an oscilloscope. I believe that requires voltage probe to look at electrical signals. 

Ron On Dec 19, 2015 10:28 AM, "Robert Borger" <rlborger(at)mac.com (rlborger(at)mac.com)> wrote: 	  Quote: 	
		  --> AeroElectric-List message posted by: Robert Borger <rlborger(at)mac.com (rlborger(at)mac.com)>

 

 Sam,

 

 I’m not exactly sure what your question is.

 

 Do you believe your phone is causing the offending noise?

 

 If so, do you have a plug-in USB charger for your phone installed in your aircraft?

 

 Blue skies & tailwinds,

 Bob Borger

 Europa XS Tri, Rotax 914, Airmaster C/S Prop (75 hrs).

 Little Toot Sport Biplane, Lycoming Thunderbolt AEIO-320 EXP

 3705 Lynchburg Dr.

 Corinth, TX  76208-5331

 Cel: [url=tel:817-992-1117]817-992-1117[/url]

 rlborger(at)mac.com (rlborger(at)mac.com)

 

 On Dec 19, 2015, at 8:35 AM, Sam Marlow <sam.marlow(at)roadrunner.com (sam.marlow(at)roadrunner.com)> wrote:

 

 --> AeroElectric-List message posted by: Sam Marlow <sam.marlow(at)roadrunner.com (sam.marlow(at)roadrunner.com)>

 

 Has anyone heard of or have any experience with one? I have noise in my system somewhere, that is throwing off my EFIS and A/P systems.

 

 

 ===========

 br> fts!)

 r> > w.buildersbooks.com" rel="noreferrer" target="_blank">www.buildersbooks.com

 rel="noreferrer" target="_blank">http://www.matronics.com/contribution

           -Matt Dralle, List Admin.

 ===========

  -

 Electric-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List

 ===========

  FORUMS -

 eferrer" target="_blank">http://forums.matronics.com

 ===========

 b Site -

           -Matt Dralle, List Admin.

 rel="noreferrer" target="_blank">http://www.matronics.com/contribution

 ===========

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

rampil

Joined: 04 May 2007
Posts: 870

Posted: Sat Dec 19, 2015 1:49 pm Post subject: Re: Oscilloscope for Android Phone

Look at something like this:



http://www.amazon.com/gp/product/B004KKTUV6/ref=pd_lpo_sbs_dp_ss_2?pf_rd_p=1944687542&pf_rd_s=lpo-top-stripe-1&pf_rd_t=201&pf_rd_i=B00BY8LVCS&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=0XBWZ07S1VW2QD6H2E6M



a purpose built o-scope is much more likely to solve you problem than

an outrigger box for a phone

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Ira N224XS

jetboy

Joined: 22 Jul 2006
Posts: 233

Posted: Sun Dec 20, 2015 3:08 pm Post subject: Re: Oscilloscope for Android Phone

I have 2 apps which work moderately well,

"audalyzer" and "simpleFFT"



you will need to cut a headset cord or buy a connector to get the signals in



there are 2 styles of connector pinout



mine is Sony Ericson, the plug is trrs:



tip - nc

ring 1 -  a 1k ohm resistor connect to sleeve

ring 2 - a 1.8 k ohm resistor to sleeve plus a 10 k ohm resistor and then  via a 0.1 uF capacitor to your probe

sleeve - ground/shield of probe



you dont really need the capacitor

the purpose of the smaller resistors is to tell the phone what type of 'headset' is connected



with these components, calibration is approximately reading in dBm on the audalyzer app for levels between 0 and -40 dBm



there is another app "TestTone" if you want to generate a signal



Ralph

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Ralph - CH701 / 2200a

rampil

Joined: 04 May 2007
Posts: 870

Posted: Mon Dec 21, 2015 5:53 am Post subject: Re: Oscilloscope for Android Phone

Hi All,



Im not sure what signals Sam is looking for with his desire for an 

oscilloscope. There is no description of the interference with his EFIS

and autopilot. Without some detailed sort of characterization of the 

symptoms you can't even guess what bandwidth you might need in a scope

to track down the noise. Is it audio range, power inverter range, RF, etc?



The android apps mentioned by Jetboy seen to be spectrum analyzers for 

audio range only, so far as I can tell, not oscilloscope apps.



Sam: what wires are you planning to look at with a scope? Power?

Digital I/O lines, analog I/O?  If you are thinking about splicing a headset

cord on to a avionics power line, remember that 12 V will smoke an Android.

Real scopes generally have voltage divider probes and and are usually

tolerant of much wider voltage ranges to start with.

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Ira N224XS

sam.marlow

Joined: 25 Feb 2006
Posts: 99

Posted: Wed Dec 23, 2015 7:48 am Post subject: Oscilloscope for Android Phone

Thanks!



rampil wrote:

 	  Quote: 	
		   



 Look at something like this:



 http://www.amazon.com/gp/product/B004KKTUV6/ref=pd_lpo_sbs_dp_ss_2?pf_rd_p=1944687542&pf_rd_s=lpo-top-stripe-1&pf_rd_t 1&pf_rd_i=B00BY8LVCS&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=0XBWZ07S1VW2QD6H2E6M



 a purpose built o-scope is much more likely to solve you problem than

 an outrigger box for a phone



 --------

 Ira N224XS





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=451089#451089

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

sam.marlow

Joined: 25 Feb 2006
Posts: 99

Posted: Wed Dec 23, 2015 8:03 am Post subject: Oscilloscope for Android Phone

I tracked it down to a bad alternator, by the old, switch parts until 

you find it! Not ideal, but it worked......

Thanks!



rampil wrote:

 	  Quote: 	
		   



 Hi All,



 Im not sure what signals Sam is looking for with his desire for an

 oscilloscope. There is no description of the interference with his EFIS

 and autopilot. Without some detailed sort of characterization of the

 symptoms you can't even guess what bandwidth you might need in a scope

 to track down the noise. Is it audio range, power inverter range, RF, etc?



 The android apps mentioned by Jetboy seen to be spectrum analyzers for

 audio range only, so far as I can tell, not oscilloscope apps.



 Sam: what wires are you planning to look at with a scope? Power?

 Digital I/O lines, analog I/O?  If you are thinking about splicing a headset

 cord on to a avionics power line, remember that 12 V will smoke an Android.

 Real scopes generally have voltage divider probes and and are usually

 tolerant of much wider voltage ranges to start with.



 --------

 Ira N224XS





 Read this topic online here:



 http://forums.matronics.com/viewtopic.php?p=451285#451285

- The Matronics AeroElectric-List Email Forum -

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

Display posts from previous:

	Matronics Email Lists Forum Index -> AeroElectric-List	All times are GMT - 8 Hours
Page 1 of 1

Jump to:

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum