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  1. Thread: Bat detector

    by pe1pwf
    Replies
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    31,503

    The resistors are all soldered on the teensy so...

    The resistors are all soldered on the teensy so these are between the teensy and audioboard.

    I hope this helps.

    17253


    On the last boards I soldered I cut the pins like this so that...
  2. Thread: Bat detector

    by pe1pwf
    Replies
    436
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    31,503

    Yes I did, somehow it seems I did not post my...

    Yes I did, somehow it seems I did not post my reply yesterday.

    I set the amplification close to 40dB on the TL972, these are the results i got in a quit room with SGTL gain set to 0

    17251

    ...
  3. Thread: Bat detector

    by pe1pwf
    Replies
    436
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    31,503

    I just updated some documentation. I don't...

    I just updated some documentation.

    I don't quite remember if I shared the link to these files before but any eBay buyer of the V0.2 board als got the link form the item description.
    The link now...
  4. Thread: Bat detector

    by pe1pwf
    Replies
    436
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    31,503

    The externder was just an idea to be able to cut...

    The externder was just an idea to be able to cut a power supply track and put a separate 3v3 source on the SD card to try and get the writing noise out of the teensy.



    I did some experiments...
  5. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Frank, Maybe you could use a SD-card extender...

    Frank,

    Maybe you could use a SD-card extender like this to be able to seperate the SD powersupply from the Teensy. On the teensy it is very hard to do that but here you can easily cut a track.

    ...
  6. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    In single ended output the -out pad is floating....

    In single ended output the -out pad is floating.

    I do have to mention the codec gain used is quite high,


    This is what I see with codec gain on 10

    17229

    I also made a few noises....
  7. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Thanks for the 0.94 version Cor. I ill upload...

    Thanks for the 0.94 version Cor.

    I ill upload it to my detectors soon.

    I have been messing with the ICS-40730, I did not like the signal that remained on just about 22-23Khz.


    I tried a...
  8. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I am still using the SPU0410LR5H-QB, the...

    I am still using the SPU0410LR5H-QB, the ICS-40730 should have a little less noise but it was hard to tell the difference.

    The SPH0641LU4H-1 is the PDM version of the SPU0410LR5H-QB.
    I never...
  9. Thread: Bat detector

    by pe1pwf
    Replies
    436
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    31,503

    This is starting to become obsessive.... 17152...

    This is starting to become obsessive....

    17152

    Dangerous stuff this kind of hobby.

    I have been out to capture some bat calls and try different cones on my microphone.

    As far as I can tell...
  10. Thread: Bat detector

    by pe1pwf
    Replies
    436
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    31,503

    I just seem to have lost a lot of noise here........

    I just seem to have lost a lot of noise here.....


    I am using the V0.2 board with opamp amplifier and a SPU microphone on this one.
    I noticed the display update noise could be heared stronger...
  11. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi Seriesman, the impedance matching of a...

    Hi Seriesman,

    the impedance matching of a transistor amplifier is quite complicated.
    It looks like this link has some nice information on impedance calculation.
    Maybe the transistor amplifier...
  12. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    No problem Cor, I was just thinking out loud....

    No problem Cor,

    I was just thinking out loud. These were the only two functions I would probably use on playback.


    I just uploaded the new hex file to my detectors.
    Will go out later when the...
  13. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Not yet finished on the roof here.... The...

    Not yet finished on the roof here.... The supports of the solarpanels were sinking into the bitumen. I thought I had a big enough surface but with the very high temperatures the bitumen seems to get...
  14. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Take your time, it looks like it is gonna be a...

    Take your time, it looks like it is gonna be a nice day for a ride, well at least here it is.
    Unfortunately I do have to repair a leaky roof so we have some work to do here.

    The delay looks...
  15. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Playback works fine, somehow recording start...

    Playback works fine, somehow recording start seems to be delayed by 4 seconds or so.

    Edwin
  16. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    As it turns out, the single transistor amplifier...

    As it turns out, the single transistor amplifier also is working quite well. If you already buit the transistor amp I guess you don't really need to build the opamp version.

    There might be a tiny...
  17. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I promised some of you to send a message when I...

    I promised some of you to send a message when I was willing to sell the extra experimental boards I have.
    Since this new board was ment to work better than the transistor amplifier board, I was not...
  18. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi Rémis, I think I remember you said adding a...

    Hi Rémis,

    I think I remember you said adding a capacitor between the 3v3 pins on the audioboard and some pins on the TFT screen helped reducing noise.

    In the past I tied to reduce noise but...
  19. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    So here we are again, using the opamp amplifier,...

    So here we are again, using the opamp amplifier, and ICS microphone in single output mode.

    I did change the biasing resistor to match the impedance of the microphone, this helped to get rid of the...
  20. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi Remis, I do have an oscilloscope. A cheap...

    Hi Remis,

    I do have an oscilloscope. A cheap one but I should be able to see some signals I guess. Although these seem quite tiny and my oscilloscope might not be the best choice.

    I have no...
  21. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    17082 Struggling here with the opamp version...

    17082

    Struggling here with the opamp version board, somehow I seem to have the spurious signal that was described and all of it's harmonics now that I am amplifying with a tl972. ( The one on the...
  22. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    The images I made are with the ICS-40730...

    The images I made are with the ICS-40730 microphone. Please investigate any acoustic issue.

    I already used a cone with a SPU0410LR5H-QB microphone. I Just put in the ICS in place of the SPU.

    I...
  23. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Have a look at these pictures, one with the...

    Have a look at these pictures, one with the microphone in the housing behind a 10mm hole, with this setup you can see a big spike near 24Khz.

    The other picture is with a cone installed. I used to...
  24. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I just picked up a Sandisk Ultra 16GB Miceo SD HC...

    I just picked up a Sandisk Ultra 16GB Miceo SD HC I card this afternoon.

    It seems to work fine. Somehow older SD cards do not seem to work anymore from V0.84 up.

    Edwin
  25. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    So I found me a cable and even a small SD card....

    So I found me a cable and even a small SD card. Somehow I can't get the 0.86 version to record. I already found the same problems when i used the precompiled hexes others made.

    Maybe it is in the...
  26. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Finally I had the 0.86 version to compile thans...

    Finally I had the 0.86 version to compile thans to post #316.
    I donwload the files from the link Remis provided.

    Removed Arduino by the uninstall feature in windows, also removed the contents...
  27. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I understand why differential mode should help...

    I understand why differential mode should help reduce common mode noise.

    17013

    I tried to add an image to make me and others help to understand.

    Can you explain the function of R11 and R12?...
  28. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Wow, a lot of activity here. I was quite busy...

    Wow, a lot of activity here.

    I was quite busy the last weeks so I did not have the time to check the forum.

    The encodes I used are very cheap chinese encoders EC11 or sometting 10pcs only cost...
  29. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I just compiled the 0.82 version again, it seems...

    I just compiled the 0.82 version again, it seems I might have posted a wrong 0.82 version earlier.

    This is the real 0.82 hex version.
  30. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I thought I might have run over a maf files...

    I thought I might have run over a maf files number but after deleting files I was not able to record or play back any files.
    The 0.82 version seems to work fine but I did expect the left button...
  31. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    It seems I have some memoycard issues, files are...

    It seems I have some memoycard issues, files are not recognized and recording starts at B1 but I have files op to B55.

    I will have to try again tomorrow. It looks like the 0.82 version works fine....
  32. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi Cor, I'm just glad to be able to help. The...

    Hi Cor, I'm just glad to be able to help.

    The files that I got compiling under windows in Arduino 1.8.7 are saved here just in case anyone needs them.

    Have you been playing with the playback...
  33. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Compiling finally worked, It does display...

    Compiling finally worked,

    It does display some warnings but no errors.

    I went back to Arduino 1.8.7 Teensyduino can be 1.44 or 1.46

    I still keep running into time errors so I used my...
  34. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi Seriesman, I already expected a detailed...

    Hi Seriesman, I already expected a detailed report of the last few nights...

    For recording you have to set the function of the left pushbutton to record.

    Turn the left encoder until you see...
  35. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Getting quite confused here... I tried to...

    Getting quite confused here...
    I tried to completely remove all Arduino stuff, reinstalled Arduino 1.8.9 and Teensyduino 1.46 thought I had all the right libraries and files including the...
  36. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I did see HAVETM in the latest uSDFS. Used...

    I did see HAVETM in the latest uSDFS. Used timelib.h like normale and added the #define HAVETM

    Now I got a new brunch of errors. I thought I already posted that here but it probably failed.

    I...
  37. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi WMXZ, I don't quite onderstand what adding the...

    Hi WMXZ, I don't quite onderstand what adding the #define HAVETM should do but I tried it anyway.

    Did you also meen I should remove #inlclude <TimeLib.h>
    Or remove #define _Time_h from...
  38. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    The FRESULT errors appear when you rename...

    The FRESULT errors appear when you rename main.cpp so do not rename that file but create a new ino file that is empty. Open that file and be sure the main.cpp and any needed additionele files are in...
  39. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Man, did I fool myself again.... This TimeLib.h...

    Man, did I fool myself again.... This TimeLib.h issue tricked me for the third time now.

    TimeLib.h does call for Time.h or time.h but windows does not seem to now the diffence. You (WMXZ) helped...
  40. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I think I know wat caused the problems about...

    I think I know wat caused the problems about FRESULT and similar. I just renamed the cpp to ino.
    Apperantly that does have a completely different effect as creating an empty ino in the same folder....
  41. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I just commented out this line in sd_config.h ...

    I just commented out this line in sd_config.h

    #define USE_MSC 1 // will be used in sd_msc.cpp

    Now the output looks like this...
    ...
  42. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    When compile the #159 post with Arduino 1.8.7 and...

    When compile the #159 post with Arduino 1.8.7 and Teensyduino 1.44 and the latest uSDFS library I get this error.


    C:\Program Files (x86)\Arduino\arduino-builder -dump-prefs -logger=machine...
  43. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    For the people struggling to find the older...

    For the people struggling to find the older versions the Arduino 1.8.7 windows installer

    Here the Teensyduino 1.44 Windows installer

    The old uSDFS library


    If everything fails, use the...
  44. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    The microphones work fine Frank, even with out-...

    The microphones work fine Frank, even with out- tied to ground with a capacitor.... It was clearly stated in the last lines of the datasheet.

    Well, I only soldered about 10 of my mics with extra...
  45. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi folks, It's been i while since I have been...

    Hi folks,

    It's been i while since I have been here. It seems I have to do some reading.

    I did run into some problems with uSDFS, the seems 13 days ago changes were made that makes the old...
  46. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hey, my reply got lost... well, I probably wrote...

    Hey, my reply got lost... well, I probably wrote it and accidentally closed the browser window.


    Jean-Do,

    I am using the SPU0410LR5H in the CorBee detector. I had a whole lot of fun sofar...
  47. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Hi Jean-Do, I solder my mems using an old hot...

    Hi Jean-Do,

    I solder my mems using an old hot plate to keep te koffee pot warm.
    It looks quite silly but there are 3 spots on that plate that become just a tiny bit hotter tan the rest of the...
  48. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    Look at post #183, the is a full parts list in...

    Look at post #183, the is a full parts list in the link,

    The microphone used is Knowles SPU0410LR5H-QB.

    The total price in parts should be just under 100 euro.
    My own calculations was 85...
  49. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    If there is anything I would like to change, it...

    If there is anything I would like to change, it is the part that i can see on the display.

    Right now, I can see the bat call's as a very small blip on a wide display like this.
    15629

    I would...
  50. Thread: Bat detector

    by pe1pwf
    Replies
    436
    Views
    31,503

    I just discovered I do not need a pet bat to do...

    I just discovered I do not need a pet bat to do some testing.


    I already used a simple signal generator and a ribbon tweeter to get some test signals for nice reference but that was no fun to...
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