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  • pe1pwf's Avatar
    04-28-2021, 06:44 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    That probably is because the detector switches HT or AHT mode in autorecord. HT or AHT has no mute and is always running. TE is muting until something is heard and than playing back and falling back to mute...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-24-2021, 04:24 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Helge, nice to read about the added GPS and temperature sensor. I have not seen anyone else using the GPS. It is a big current consumer but it can help you to know where the recording was taken. The temperature...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-13-2021, 11:11 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    These resistors are not in the way and do not consume any significant current These conet to the data lines of the micro SD card socket on the audio board. I simply put a resistor in every data line connecting to the...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-11-2021, 04:36 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I don't expect a lot of activity but it looks like t could be a dry evening. It is quite chilly though. You could use two small signal diodes in parallel, one from the old circuit and one from the pwm circuit....
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-11-2021, 10:44 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Man, it becomes hard to keep up here... When work was done by Cor on the 1.1dev version I decided to work the manual. It seems a bad idea to work on it because changes are coming very quickly these days, so some...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-03-2021, 07:01 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Volume 55 Gain 24 TE Waterfall Samplerate 176k (better use of display width with most common species) Recordings 352 (281 should be enough, 384 trends to be a bit more noisy) Playback 32 (about 1/10 th of 352) ...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-01-2021, 07:10 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Man so many messages in a short time. I had to read back more messages that expected to see a bunch of questions from David. The questions about the signal strength are quite difficult, how much Pa do you create...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-01-2021, 05:09 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I also see something about the pressing of the button on the teensy for programming. Teensy also has a reboot exe, if you look at my google drive there is file called updateXP this contains all files and a small...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    04-01-2021, 03:44 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I had a similar issue. Yesterday I powered op a detector that I left on autorecord the night before. I had almost 700 recordings. Inserting an empty card (OR removing the 700 files card) solved the hanging in the...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-27-2021, 08:46 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi David, You should hear something if the spectrum shows something or when the waterfall is scrolling. I normally don't need gain higher as 30 to start seeing some noise if I am near my computer, or switching...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-27-2021, 06:42 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi Thierry, this Oktober 5 version is probably the date you are referring to on my google drive, this is the 1.x version with hex filenames. That is indeed the most recent version that is released. Cor has been quite...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-26-2021, 05:32 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Also check for a short on the AF input pins (mic pins in the audioboard)
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-26-2021, 04:34 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    For some test audio you could use the traingfiles.zip from my google drive.
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-26-2021, 04:32 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    For audio output test it it quite easy to play a file and hear it in the headphones. For the headphones you should use a stereo (3 contacts) jackplug and not a 4 pin headset plug. The microphone or amplifier can...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-21-2021, 08:18 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    The forum shows we are already on page 30, but my browser won't open that page. Maybe it will with this new reply. I did already get some questions about a new revision of the board. I do have to admit I am kind of...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-17-2021, 05:21 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Helge, if you look a few pages back you will find post 688 or 687 which has some info on the GPS. I am only using the power (5v) ,GND and txd Line of the GPS module. The GPS uses a lot of curent so I use a switch to...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-16-2021, 08:38 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I just stopped working on improving GPS reception, I seem to have aquired a small fortune of GPS units over the last weeks. And only two out of nine different pcs worked well enough. I somehow even fried an...
    845 replies | 94404 view(s)
  • pe1pwf's Avatar
    03-16-2021, 08:08 PM
    I tried several gps units, my test were all indoor under a thin flat roof with thin board and thick polystyrene insulation, old bitumen and layer of EPDM rubber. Over the Teensy I mounted a small tinned metal sheet,...
    10 replies | 465 view(s)
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About pe1pwf

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About pe1pwf
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Netherlands
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Ham radio / electronics
Occupation:
Mechanical and electrical service tecnician

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