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  1. Thread: Bat detector

    by CorBee
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    Hi Hendrik, Nice from you to share the...

    Hi Hendrik,

    Nice from you to share the experience ! The PCB from edwin is a great addition to this project as it makes the building so much easier.

    regards
    Cor
  2. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi, For those interested, you can download the...

    Hi,

    For those interested, you can download the beta version of the TeensyBatDetector V1.0 from https://github.com/CorBer/teensybat_V1_beta
    This is NOT yet the finished product so you might...
  3. Thread: Bat detector

    by CorBee
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    Wrapping up code development for V1.0

    Hi,

    Edwin (THANKS !!) and I are currently working on testing a completely renewed version of the TeensyBatdetector. Several of the requests posted in the forum have found a place in this version...
  4. Thread: Bat detector

    by CorBee
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    55,777

    Hi Zach, Thanks for sharing! Lets hope this...

    Hi Zach,

    Thanks for sharing! Lets hope this encourages more people to hear bats and other animals. On your great webpage I also see you have experience with hydrophones, one of my hopes is that we...
  5. Thread: Bat detector

    by CorBee
    Replies
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    55,777

    Hi Zip, I did some readup on #2 of your...

    Hi Zip,

    I did some readup on #2 of your requests and added 2 links to older discussions on this forum that might be helpfull. I think the graph in...
  6. Thread: Bat detector

    by CorBee
    Replies
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    55,777

    Hi, Nice to see that you are adding something...

    Hi,

    Nice to see that you are adding something to this project by opensourcing your design for an enclosure. THe noise on 23Khz is something Edwin and I also have been exposed to. Having an TFT...
  7. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi all, Currently I am (together with Edwin)...

    Hi all,

    Currently I am (together with Edwin) working on part of the code for the Teensy Batdetector, if there are requests for features or changes in features or bugreports please tell us.
    ...
  8. Hi Ivan, Thats great !! regards Cor

    Hi Ivan,

    Thats great !!

    regards

    Cor
  9. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi, Yes, the code from my github page (...

    Hi,

    Yes, the code from my github page ( https://github.com/CorBer/teensy_batdetector ) uses a routine called set_SR that does this. For the teensy 3.6 !!! this sets the DIVIDE and FRAC frequencies...
  10. Thread: Bat detector

    by CorBee
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    582
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    55,777

    Is that including the logger-board ?

    Is that including the logger-board ?
  11. Thread: Bat detector

    by CorBee
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    55,777

    Sounds like a standard heterodyne detector, I...

    Sounds like a standard heterodyne detector, I hope you can build/test this for yourself. I wonder if the total price for this (the ardubat-logger) is however not close to the detector we are...
  12. Thread: Bat detector

    by CorBee
    Replies
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    55,777

    Hi, According to me that project was mainly...

    Hi,

    According to me that project was mainly set up to remotely record bat activity, not to listen actively to bats with headphones. But if that is what you were planning to do I am sure it will be...
  13. Thread: Bat detector

    by CorBee
    Replies
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    55,777

    Hi Edwin We could change the high-encoder...

    Hi Edwin

    We could change the high-encoder knobs for rotational-switches on the side. I havent looked for those but I am sure they can be found. That would keep the setup thinner.
    The rotary...
  14. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi, If you have ideas/requests please share...

    Hi,

    If you have ideas/requests please share them and ... we are always interested to see your compact detector. Which hardware do you plan to use ?

    regards
    Cor
  15. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi, I do not think it is possible to create...

    Hi,

    I do not think it is possible to create this on an ESP8266 or ESP32. Many of the routines used to make the detector run are based on the audio-system that is designed for the teensy. The code...
  16. Thread: Bat detector

    by CorBee
    Replies
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    55,777

    As always I have also added a pre-compiled...

    As always I have also added a pre-compiled version on my github:

    https://github.com/CorBer/teensy_batdetector/blob/master/pre_compiled_hex/firmwarecorbee_v100.hex

    regards
    Cor
  17. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi Zach, Considering 2 buffers and interupting...

    Hi Zach,

    Considering 2 buffers and interupting the current play, I dont know if that would be wise. If you have picked up a signal and start slowing it down with TE when can we infer that initial...
  18. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi Zach, Welcome to the forum. Its always nice...

    Hi Zach,

    Welcome to the forum. Its always nice to see new ideas/users actively participating. On to your ideas/questions:

    The current setup of AUTO_TE is set to start an AUTO_TE replay (from...
  19. Thread: Bat detector

    by CorBee
    Replies
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    55,777

    Congrats, good to see you did not give up hope ;)...

    Congrats, good to see you did not give up hope ;) I am interested to see how it works, did you allready try to record some bats ?

    regards
    Cor
  20. 17836 This is another option

    17836
    This is another option
  21. Yeah, in the GUI they do not show until you place...

    Yeah, in the GUI they do not show until you place the component on the drawing-board.
  22. 17821 Hi, This should work, you only need to...

    17821
    Hi,

    This should work, you only need to set the mixer-values to get the signal more/less on right/left.

    regards
    Cor
  23. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    When you look at the schematic 17720 it is not...

    When you look at the schematic 17720 it is not clear.
  24. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    The digital stream is MONO when using MIC_IN...

    The digital stream is MONO when using MIC_IN according to me. The docs tell that we can even switch to a LEFT_ONLY mode when using MIC_IN. This is controlled in bit 6 of the CHIP_ANA_POWER register....
  25. Thread: Bat detector

    by CorBee
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    55,777

    When line-in will be used for tests be aware that...

    When line-in will be used for tests be aware that there are quite some reports on the difference between the line-input L and R see: https://community.nxp.com/thread/467119
    It seems line-in L has...
  26. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi at Thanks for that info. I was simply not...

    Hi at


    Thanks for that info. I was simply not aware of that and after reading up on the internet I see the 1st harmonic is used as another name for the fundamental-frequency. My explanation of...
  27. Thread: Bat detector

    by CorBee
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    55,777

    SGTL5000 tests part 6: REF_CTRL and harmonics

    REF_CTRL, 1st/2nd HARMONIC

    This is the final part of the analysis based on the files Edwin has collected for many different samplerates, gains and REF_CTRL settings. The graph below shows on the...
  28. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi, Its Edwin's setup and the reason for the...

    Hi,

    Its Edwin's setup and the reason for the relay is simple ... we needed to be able to record many test-sequences in a row without having to manually connect/disconnect anything. Collecting many...
  29. Thread: Bat detector

    by CorBee
    Replies
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    55,777

    You can read that all in the first posting I made...

    You can read that all in the first posting I made after we have done the tests, post #464.
  30. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    We have not used the MIC and preamp in our tests...

    We have not used the MIC and preamp in our tests ...
  31. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    The current BIAS is part of the REF_CTRL setting...

    The current BIAS is part of the REF_CTRL setting of the SGTL. Default it is set to 2 which means 12.5% above nominal. This setting can be changed to 0% (nominal) and down to -50%. We have tested this...
  32. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi, I am sure Edwin will have a look at your...

    Hi,

    I am sure Edwin will have a look at your remarks. And when you build one, it will be absolutely simple to switch to line-input and no-gain is a software setting !

    Cor
  33. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    Hi, I think now understand your question. The...

    Hi,

    I think now understand your question. The narrow peaks you see are not visible in the spectra I have seen, they might be present but can also be swamped by other noise. We have looked at...
  34. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    I have seen those before, but it does not answer...

    I have seen those before, but it does not answer (at least for me) what you would like to see from the samples we collected. You want to see a spectrum of the so-called "silence" ?
  35. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi Chip, Thanks for having a look. Going...

    Hi Chip,

    Thanks for having a look. Going through the bullets although I dont mind getting these ;)

    1) I was using contrast as a term as we simply show the difference between for instance...
  36. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    SGTL5000 tests Part5: REFCTRL and median Noise

    Noise in the silent sections
    After splitting the wav-files into signal and "silence" I calculated the median and the 5%,95% percentiles of the "silence" to get an idea of the bandwidth of the noise....
  37. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    Hi Welcome to this forum ! I am interested to...

    Hi

    Welcome to this forum ! I am interested to hear and see your progress in building the batdetector. Several people have been building the system using either the transistor or the IC opamp and...
  38. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    Hi Walter, I know you did those tests but the...

    Hi Walter,

    I know you did those tests but the discussion at that time more or less ended rather fast. Since we had all this data - with the purpose of testing the effects of using REF_CTRL - I...
  39. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    SGTL5000 tests Part4: REF_CTRL

    REF_CTRL tests
    The REF_CTRL setting on the SGTL5000 has two parts that can be changed, the VAG (VAG is the internal voltage reference for the ADC and
    DAC) and BIAS which controls the bias currents...
  40. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    SGTL5000 tests Part3: testing frequencies

    Testing the frequencyresponse
    We are using the SGTL5000 well above its normal specifications to record the frequencies of the incoming signals. Since it was unclear if the SGTL5000 could handle all...
  41. Thread: Bat detector

    by CorBee
    Replies
    582
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    55,777

    Hi Remis, Maybe wait with this until you have...

    Hi Remis,

    Maybe wait with this until you have been able to inspect the results of this work ... I am going to show step by step the process and the results. Doing this all in a single post would...
  42. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    SGTL5000 tests Part2: Initial datahandling

    Initial Processing
    The WAV files were directly loaded into the jupyterlab-environment using the SciPy library. After loading the data was scaled to a maximum -1..1 range by dividing with 32768. ...
  43. Thread: Bat detector

    by CorBee
    Replies
    582
    Views
    55,777

    SGTL5000 tests part 1: SETUP

    What happened before ?
    At the beginning of september I tested if changing the MIC_CTRL and REF_CTRL settings on the SGTL5000 had effects on signalstrength and spectrum. My tests were showing clear...
  44. Replies
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    Hi Thanks for the reply. As I was going...

    Hi

    Thanks for the reply. As I was going through the possibilities for the bat-detector playing so playing CLK_CTRL settings was something I had not tried yet. It was the difference in harmonics...
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    Hi, Just by chance I see you have been testing...

    Hi,

    Just by chance I see you have been testing different setups to change the samplerate, have you done any further work on this ? One of odd things your spectrum graphs show is that with a SR of...
  46. Replies
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    This is the output I get (I tried with teensy3.1...

    This is the output I get (I tried with teensy3.1 but this gives the same issues as teensyLC)

    compilation terminated.
    Archiving .pio/build/teensy31/lib08f/libWire.a
    Indexing...
  47. Replies
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    997

    Hi, I just tried to use your code and got the...

    Hi,

    I just tried to use your code and got the same errors. The direct link between NXPmotionSense and util/crc16 seems to be inside Nxpmotionsense.cpp. Just adding CRC16.h to your project does not...
  48. Replies
    21
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    997

    Can you share your full code ?

    Can you share your full code ?
  49. Replies
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    You could simply copy this:...

    You could simply copy this: https://github.com/PaulStoffregen/cores/blob/master/teensy3/util/crc16.h
    into the library-section of your project as a fast solution
  50. Replies
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    If you look at:...

    If you look at: https://github.com/PaulStoffregen/NXPMotionSense/blob/master/examples/CalibrateSensors/CalibrateSensors.ino

    You see that the program starts with:


    #include <NXPMotionSense.h>...
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