Andras

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  1. Hi guys! First of all I want to say that I love my AD2 and all the support it gets from Digilent and the community! This little device helped me to conduct so many fascinating experiments that I could not have done with it. I learned a lot during the process and I consider myself an absolute fanboy 😄 Having said that I collected a few feature requests (or rather wishes) over the last year that I would love to see in its next version. They are ordered by my personal priorities. Small (ideally Raspberry Pi model B-like) form factor Much bigger scope samples buffer Har
  2. Szia @attila, I fixed the C# wrapper, now it works on both Windows and Linux and I corrected two method signatures in that file, please find it attached. I played around with the Record function (using the FDwfAnalogInStatusRecord method) on my Windows desktop and on Raspberry Pi 4. I used .NET 5 and C#, so my actual source code is identical on both platforms. I noticed that as I raised the sampling rate, I started to get corrupted recordings above a certain sampling rate. On Windows I could reach 1 MHz, but the highest value was only 125kHz on the Pi. I also tested this wi
  3. Hi, I have a very basic .NET 5 based C# console application that opens the Analog Discovery 2 using the DWF.cs wrapper class included in the WaveForms SDK v3.15.5 (64-bit) on Windows. I could install the .NET 5 runtime on my Raspberry Pi 4 B, and I could run other .NET apps on it without any issues. I created a small application that opens my AD2 and starts acquiring data from its CH1 input. It runs as expected on Windows 10, but when I run it on the 32-bit Raspberry Pi OS I got the following error: Unhandled exception. System.DllNotFoundException: Unable to load shared
  4. Hi @Chuankun, I had a similar problem. I have just bought and updated a Raspberry Pi 4 B and installed Adept Runtime 2.21.2, Adept Utilities 2.4.1 and Waveforms 3.14.3 without any issues. When I run Waveforms from the applications menu its Device Manager doesn't see my AD2, despite it's connected to one of the USB 3.0 ports. I tried both lsusb and sudo lsusb, and there was a difference, the latter showed more devices, so I also tried to run Waveforms from the command line sudo /usr/bin/waveforms, and it started to work! (I probably made a mistake when I installed the Digile
  5. Thanks to you @7M4MON and @fusionimage I could compile and install everything both on Ubuntu and Raspbian. My joy isn't complete just yet, but I'll update my progress on GitHub as I try to make it work on Windows 10 too: https://github.com/7m4mon/gr-ad2/issues/1
  6. @fusionimage Did you manage to make it work? I opened an issue for @7M4MON on GitHub, because I'm new to GNU Radio and I can't seem to make it work. I got errors because of missing blocks: https://github.com/7m4mon/gr-ad2/issues/1 Could you guys help me with this?
  7. Thanks @attila for the tips! I would like to ask for your help: what would you do if you wanted to measure two (fluid) samples at the same time over and over? For my current experiments I would need to measure the capacitance of one sample and another sample as a control. I'm willing to build a small hardware if I need to, but I really would like to use AD2 and WaveForms to make it happen. Plan A is that I start up two WaveForm instances, one with AD2 and one with the Sound Card option, and I would create a small extension (with fixed resistance) to my soundcard following the diagram
  8. Thanks @attila, that's good to know! I might use my PC soundcard as a signal generator, it looks an easier workaround for now
  9. @attila That's pretty cool! Also, I'm not sure if this was there in the previous versions, but I really like the "Pick screen color" function, because I like to use RGB gradient tool (http://www.perbang.dk/rgbgradient/) to get my gradient colors. 👍 Anyway, I have a question relating to my next phase of my experiments: is it possible to use the BNC Adapter with the Impedance Analyzer? I would need to stimulate something with a signal generator while doing the capacitance tests over and over. As I quickly tested it, the Impedance Analyzer module seems to be not working
  10. Hi guys, Today I created a mixture with tap water and glucose just as before. I made a short (3.3 minute-long) and a long (2.7 hour-long) experiment. I made a test with water + glucose mixture and then I did the test once again after I put the baker's yeast into the mix. I focused on both the impedance and capacitance values. Here are the results for the short test: The blue is the tap water for reference. The two reds are the water + glucose combination. I made the two measurements approximately 60 minutes apart, but I also made sure that they have the exactly same
  11. Cool stuff @attila! Thanks, I will definitely try it tomorrow!
  12. Alright, I finished the tests for today, here are the results. I used "traditional" yeast now, and not the brewer's yeast as before. (A - blue - left) 27 Celsius water + 2.5g glucose + 2g yeast (B - red - middle) 27 Celsius 2.8% milk + 2.5g glucose + 2g yeast (C - green - right) 50 Celsius 2.8% milk + 2.5g glucose + 2g yeast [please note that all the temperatures converged to our room temperature in the end to 28 Celsius] The following two pictures were taken 5 minutes (light color) and 120 minutes (darker color) after mixing the ingredients together.
  13. Hello @Cleber Borges Today I tested a few things: I made a measurement before and after cleaning the electrodes and I did the same before and after I whirled the mixture. Neither of them modified the values, which is good news. I have found one interesting thing though: if I make the impedance measurement while the temperature sensor is submerged in the mixture, it distorts the values in the 20-25 Mhz range. I use a multimeter to measure the temperature, so from now on I will not keep its probe in the mixture, and I will put it into the fluid only for a few seconds when I actually
  14. Alright, so I made 9 consecutive measurements in 10 hours on both tap water and the yeast + sugar + water mix. The results for the water are the following: And results for the yeast: The values are changing for both over time, which is expected, but there are a few strange things: - The first tests for both are not in line with the changes happening later, they look off. - The amount of changes for both samples are similar, does this mean that it doesn't matter if it's something living like the yeast or non-living like tap water? - I'm not sure what t