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  1. Hi, In the batdetector project (...

    Hi,

    In the batdetector project ( https://forum.pjrc.com/threads/38988-Bat-detector ) we use the oscillator function at very high samplerates (up to 352k) without any problems. In the heterodyne...
  2. Thread: Bat detector

    by CorBee
    Replies
    648
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    60,385

    Hi, Ive just uploaded a hex where the HiF_bin...

    Hi,

    Ive just uploaded a hex where the HiF_bin is not used anymore, this is a direct link https://github.com/CorBer/teensy_batdetector/blob/master/pre_compiled_hex/firmware_DEV20200904.hex
    ...
  3. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Instead of changing the HiF_bin (used currently...

    Instead of changing the HiF_bin (used currently in the detection of ultrasound) its also an option to completely remove the test, the Hif_bin is only used in this line of code of bat_fft.h
    if...
  4. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    In the startrekversion I chain a heterodyne-mixer...

    In the startrekversion I chain a heterodyne-mixer after the time-expansion. This allows you to hear the sounds from 0-100000 Khz as a band from -5Khz to 5Khz with the TE_expander on 1/10. Not ideal...
  5. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hi, We could make the HiF_bin simply half the...

    Hi,

    We could make the HiF_bin simply half the samplerate minus 5Khz or so ? Since I dont think at the top of the range will be as sensitive ?

    Cor
    PS: I could also open the startrek version :)...
  6. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hope you like it !

    Hope you like it !
  7. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    The update is available as a hex and its a...

    The update is available as a hex and its a "trial" version. Everything should work as before but the detector-screens will be different and will show the calls more detailed. Next to that if you want...
  8. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    21504 Sometimes ... i wished I would hear a bit...

    21504
    Sometimes ... i wished I would hear a bit more bats around my house. Most evenings when I try to test functionality of the batdetector I can hear crickets/grasshoppers and if I am lucky one or...
  9. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hi Craig, Never tried that, I dont know what...

    Hi Craig,

    Never tried that, I dont know what spectra and power a powerline emits.

    regards
    Cor
  10. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hi Frank, Thanks for the help, I see that this...

    Hi Frank,

    Thanks for the help, I see that this will take considerable time to create. For the moment being I am letting this rest.

    regards
    Cor
  11. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    @DD4WH Frank I would like to incorporate the...

    @DD4WH Frank

    I would like to incorporate the ZoomFFT in the Teensy_batdetector. That way we could look (in more detail) at the more interesting part of the spectrum instead of looking at the full...
  12. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hi, I like to hear/see people come up with new...

    Hi,

    I like to hear/see people come up with new ideas, combining two MEMS ... interesting !! Using the ADC ... questions .

    Just to add my grain of salt ... as I am mainly busy with the software...
  13. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hi Ivano, Welcome in this project, I hope you...

    Hi Ivano,

    Welcome in this project, I hope you can share your experience with the teensy-batdetector as soon as you have build it. I am especially interested to hear/see how the different...
  14. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hi Hendrik, I looked at the Mini-Con-X...

    Hi Hendrik,

    I looked at the Mini-Con-X connectors before but found them way to expensive.

    regards
    Cor
  15. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    New teensy_batdetector V1 beta sourcecode and hex released

    Hi,

    I have just uploaded the most recent code for the teensy_batdetector. Its available from https://github.com/CorBer/teensy_batdetector
    A lot of work during testing of this version in previous...
  16. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Interesting to see how it performs. I am using...

    Interesting to see how it performs. I am using plugs on my detectors also, thusfar I have used a GX16 connector but the one that I am currently building I am trying to see if using a 3.5mm...
  17. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Hi Hendrik, Thanks for sharing that article, I...

    Hi Hendrik,

    Thanks for sharing that article, I have seen it before. We are interested to hear from you how good that SMX-US microphone works in the current setup. The article mentions that these...
  18. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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
  19. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  20. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  21. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  22. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  23. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  24. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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.
    ...
  25. Hi Ivan, Thats great !! regards Cor

    Hi Ivan,

    Thats great !!

    regards

    Cor
  26. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  27. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    Is that including the logger-board ?

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

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  29. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  30. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  31. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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
  32. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  33. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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
  34. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  35. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  36. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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
  37. 17836 This is another option

    17836
    This is another option
  38. 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.
  39. 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
  40. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

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

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

    by CorBee
    Replies
    648
    Views
    60,385

    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....
  42. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  43. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  44. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  45. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  46. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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.
  47. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

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

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

    by CorBee
    Replies
    648
    Views
    60,385

    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...
  49. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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
  50. Thread: Bat detector

    by CorBee
    Replies
    648
    Views
    60,385

    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...
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