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  • pe1pwf's Avatar
    10-25-2020, 09:27 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I guess I could also write something about the filenames and recording duration. We ran into an issue using autorecord. Upon creating a new autorecord file we there was a check for the next number. Somehow that...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    10-24-2020, 12:11 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi Justin, We are gathering samples much faster that the SGTL chip was intended for but it works. I guess the code describes who found the way to take quicker samples or maybe Cor can reply on that. It works just...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    10-18-2020, 08:59 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi Ivano, Are you still reading this tread? I guess so. I have been playing around with your schematic, it actually looks like something I tried before. And I mean the active filtering in te second opamp stage. I...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    09-21-2020, 07:00 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I discovered this issue Cor described when I wanted to have some recordings comparing the FG element I recently bought and the SPU element that I have been using up to this point. Some times the recording seemed to...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    09-13-2020, 06:44 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Two nights ago I tried an FG element in my detector and found is was much weaker than the SPU element, maybe almost like 20 dB lower in my test recording. So I changed some parts in the amplifier and took out the small...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    09-11-2020, 08:15 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi Ivano. I did not read through the LDO datasheet but usually capacitors on the output side of the LDO are larger. Are you sure 100nF is sufficient? Why the 2v5 regulator and not a voltage divider? Is voltage...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    09-10-2020, 04:51 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    It is easy to fry your parts with hot air if you are not used solder like that. I always soldered SMD with my old Weller magnastat that I always used with standard(B7?) tip. People think that is huge and showed me their...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    09-09-2020, 08:35 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi Ivano, thank you for letting us know you are working on this. I had no idea it would make much difference to use the inverting or non inverting input of the amplifier. I guess I skipped that part of the datasheet. I...
    662 replies | 64961 view(s)
  • pe1pwf's Avatar
    09-02-2020, 09:19 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Did anyone already capture a horseshoe? I do not have them around here so I played some recording. I you have a good recording of rhinolophus hipposideros (lesser horseshoe) I'd like a copy. This is an image of...
    662 replies | 64961 view(s)
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About pe1pwf

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

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Bat detector 10-25-2020 09:27 AM
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11-11-2018