The Oscilloscope pro now has added the logic analyser from the Gabotronics Units!! So get those digital logic units out and get analysing!!
Just want to take the chance to support Gabotronics and give you guys word of the Xprotolab Portable project on kickstarter.
He’s doing really well, but needs that final push to reach that all important target!
http://www.kickstarter.com/projects/920064946/xprotolab-portable?ref=live
Finally that change is here!!
I have teamed up with oscilloscope hardware manufacturer to provide a USB solution to an android oscilloscope. The device is super cheap at $50 and paired up with the NFX oscilloscope it becomes a must have in portable oscilloscope technology.
More information on the Gabotronics Xprotolab can be found here .
So if your lucky enough to have a phone or tablet with USB support your in luck!!! Head over to the main oscilloscope page for more info.
Well, I am still planning updates in the near future. But damaging my phone has stopped me developing. But I am back up and running now.
But whilst your waiting I have been sent to amazing information on scope probes and calabration of the application.
Check the link out for a comprehensive run though.
http://www.instructables.com/id/A-Preamplifier-for-Smartphone-Oscilloscopes/
Exciting things are happening at nfx developement. I’ll update with the situation soon!!!
This is just a quick new video showcasing NFX oscilloscope V5.0 and new scope probe from this great guy!
http://www.nicomania.de/en/ipod/oszilloskop-tastkopf-fuer-ipod-iphone-und-android/
I’ve just receive a email from a new user who has made their own selectable input voltage scope cable.
Hit it up and see if it helps you??
The translation buttons are in the top right hand corner!
http://www.nicomania.de/ipod/oszilloskop-tastkopf-fuer-ipod-iphone-und-android
Ok, I promised a update, and here it is!
The main change within the new version is a WHOLE new rebuild. I have taken the great compatibility of the SpecScope and ported this across to the Oscilloscope. Users who had problems before should now see great stability, opening the Oscilloscope up to the masses.
As always, I’m looking for feedback from wherever it comes from!
Ok, now for some changes you will all see! There is no more sliders to play with, the UI is now fully controllable with just your fingers and the one screen.
So the big change out of that list is the ability to write the buffer to file. This will be a 1 second snap shot of the current paused/triggered buffer. The trigger point will be centred at 0.5s for analysis before and after the trigger value. At the current time, the output files are called oscOutput[nubmer].csv, the number is dependant on files previously written. A message will show the name of the output file.
In the future I will hope to be able to read files back in, also leave the naming up to you!
The screen orientation is now dependant on your native settings, therefore if auto rotate is enabled, the application will work in any orientation. (Thats one for you guitarist in the video, thanks for the plug)
It is now possible to configure the voltage span of the signal in the settings, therefore if the input conditions are known the oscilloscope can be calibrated correctly . (Quick tip zoom right out in the Y axis and measure a known input voltage against the divisions, remember there are 6 voltage division on screen.)
Rightio!
After the success of the SpecScope, my focus has turned back on the Oscilloscope. I have had some reports of bugs on nexus S phones, which is a great shame. Although I can assure you that I do know that it an Audio API problem. In which the SpecScope implementation does work. So I’m hard at work trying to port the structure over to the oscilloscope. This should bring much better performance and compatibility across the whole board.
Thank everyone for your continued support!!!!
Ok Guys, I’ve finally got round to testing a scope probe with the NFX Oscilloscope and SpecScope. This uses the headset input which makes it super convenient.
I bought a premade scope cable from http://www.hmb-tec.de/HMB-TEC/Scope_Cable.html which seemed pretty good quality really. I did have to modify it slightly for my HTC Hero. There was a load resistor which went from the mic (signal) input to ground on the jack end, this is for the iPhone to recognise an external source has been plugged in. This seemed to attenuate my signal far too much, although looking at other post I do no think this will be required on most newer phones. I will try and confirm this when the new Galaxy nexus comes out!!!!
There is other alternatives to this scope cable though, you could buy an adapter cable from https://www.kvconnection.com/Articles.asp?ID=165, these adaptors have there own load matching in them, so you could just convert from a standard BNC connection to the 3.5mm TRRS with adaptors.
I would always suggested checkout your headset pin assignment on your phone before buying anything. https://www.kvconnection.com/Articles.asp?ID=165 and http://pinoutsguide.com/pin_HeadsetsHeadphones.shtml are the best sources I found, but I think they have not got all the newest phones. Although I do know that most phones line up to the iPhone standard or T-L R1-R R2-GND S-Mic . I have seen the at the galaxy S does not though!!!!!!! Basically what I am saying is go careful guys, I am not responsible for blowing up you phones or buying the wrong product.
As we are on this note, please please be aware of the voltage level you are inputting into your phone! If you are making your own device I would always suggest putting some diode protection in there. I would say something at 4V4 would do it. But that is only my phone, please do not quote me on this.
It is important to note that there is DC blocking in mic input of a phone, therefore you can only analyse AC transient signals. Another thing to note is that we know the sample frequency is only 44k1, therefore anything above 22Khz will be unreadable by the oscilloscope. So those guys wanting to look at higher frequency square waves, sorry it wont be for you.
To finish it off, there’s a little video I made last night, which shows a couple of sine wave inputs. It has also shown me a a few places I can update the Oscilloscope as well, so nice updates are on thier way!!!!
NFX Development 