Ferda
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Posts posted by Ferda
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On 2/18/2020 at 11:32 PM, modmix said:
My AD2 could be used for that.
Let's discuss the procedure offline.
UlliHi Ulli,
Jake returned positively. Can you please contact with him over "stuffmade-248(at)yahoo(dot)com". He says "If someone is willing to let me borrow their AD2 for a week or so to fix this issue, then I'd be happy to see if we can make that work. Please ask them to email me for details. Thanks! "
Best wishes,
Ferda
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10 minutes ago, attila said:
Hi @Ferda
You can find the latest manual, corresponding to the software version in the SDK installation:
OK, Thanks a lot!
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50 minutes ago, attila said:
Hi @Ferda
The minimal differences between in AD1-2 are the analog io, power supplies and monitoring:
Hi @Attila,
Many thanks for your prompt reply. I could not find this table on the reference manual SDK from Digilent. Was that a previously uploaded document? Can you please route me to link of PDF file?
BW,
Ferda
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On 8/6/2019 at 6:37 PM, attila said:
Hi @modmix
I'm not sure if it is true but Windows Defender identifies it as threat!
The AD1 and AD2 hardware are very similar. The API is identical. The only differences are in the power supplies configuration where AD2 voltages can be adjusted and user supplies vs auxiliary supply monitoring.
The "Impedance Analyzer"/"Audio Analyzer Suite" software should work with AD2 if the creator would allow connecting to it. For this he only needs to accept the ID of AD2 like it does for AD1.Hi Attila,
The developer says " Yeah, the hardware is exactly the same except for the variable output power supply in AD2. I suspect the issue is the API call to retrieve the AD status where it returns various info like internal temperature, USB voltage and current, plus status of the power supplies, like on/off, voltage and current. I suspect this call returns the info slightly differently on AD2. It would probably be a 5 minute fix if I had an AD2, but I can't really justify spending $300 just for this."
Do you able to help?
Best wishes,
Ferda,
NB.This should be the latest version; https://www.dropbox.com/sh/ylf9i87dac65q2k/AABA_Rqgm1r5Ql0MsNyM7ajta?dl=0
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On 4/29/2019 at 8:33 PM, fonak said:
Hi Ferda
I am currently at the stage of designing an external adapter PCB similar to this presented video (I read the whole post about it on eevblog). This adapter should at least solve some of the problems you're talking about (eg stronger output based on LT1210 or BUF634).
PS. Do you have a link to the program that the author of the attached video use?Hi Fonak,
Thanks for your response. Unfortunately, the author or the developer removed the program from the web (probably due to the commercial importance). However, he still has some plugins (eg. audio analyser suite etc.) on his youtube account with download links. I think, the hardware section has several different modifications such as you suggested to use (LT1210, I am not sure from this driver, perhaps a smaller one such as OPA569 etc. can be a lighter version). If I would access to a source code perhaps I would give a try to modificate it with some effort. However, I am not able to reach it anymore. Btw, if you need previous versions of the advertised software on the video I may have in my download folder which I can share privately with you.
Best wishes,
Ferda
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Hi All,
I am a material science chemist and using impedance method to characterise the dielectric properties of some novel materials by paralel plate capasitor method. As you can imagine there are a few brands who produce decent instruments for these kind of measurements. But, with the developing technology it is possible to observe similar readings with AD-IA combination compared to old 100K$ instruments. I am also an electronic hobbiest and bought an AD2 just for testing the idea and compared the result with an instrument. On that time the IA board was not available but, the readings was very similar to a commercial instrument. Anyway, now with the IA option it is more easy to make measurements. But, the biggest problem with the current setup non-autoranging the resistor values. Sure, this can be overwhelmed by making some coding. However, the IA add-on board is very complex to modding, i.e. the realys have laching function which can not be released by applying reverse control logics. Furthermore, there are also several other lack of hardware functions, such as high output current, limited input impedance of the CH1/CH2 althoug the input opamps has very high imput impedance etc. Hence, I think in the first instance the IA board should have auto ranging function. This can be done by the DIGILENT engineers, which is out of my experience and I do not have time to understand communication protocol and commands for communication of AD2 with computer. The second development again can be done by digilent which can be a decent IA board (IA2). This second release should have higher WG current to measure lower impedances and high input impedance function to read high impedances (There is a video on You-Tube mentioning a basic board ).
I think these add-ons can increase the importance of AD and Digilent which did a great job upto now. Best wishes
Suggestion for improving the impedance analyzer
in Test and Measurement
Posted
Hi Ulli,
Everything works properly. The new version includes an acknowledgement to "Ulli" on the flash page! Hence, you did a great contribution. I hope your AD2 is going to reach you soon and can make your own experimentation.
Best wishes,
Ferda