Forum Rule: Always post complete source code & details to reproduce any issue!
Tab Content
  • 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...
    653 replies | 61095 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...
    653 replies | 61095 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...
    653 replies | 61095 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...
    653 replies | 61095 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...
    653 replies | 61095 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...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-27-2020, 06:17 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    What is that with the display Cor? It looks much different compared to the v1.0 software... Well I know of course, and in case you guys did not notice how good the serotine looked in Cor's last message, I...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-24-2020, 03:08 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    It would be nice if something as simply as an oriental frying pan or lid could work, unfortunately the higher te pitch the shorter the wavelength and the lager the chance that the sounds are reflected are not in phase....
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-22-2020, 12:33 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I guess you should be able to hear discharge sounds, MFJ is selling the 5008 as device to detect ultrasonic discharge sounds with a parabolic dish. MFJ is normally producing HAM radio equipment, apparently they use...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-16-2020, 06:19 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    As Cor explained we did already try the ADC input, also the line-in of the audio board was tested already. Line in was not better than mic in and line in ment we did not have the full advantage of the microphone...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-16-2020, 10:26 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi Frank, Thank you for your comments, the "hole" in the sensitivity of the ICS microphone does indeed not really seem to affect the termination of bat species, there is not a huge difference signal to noise ratio. I...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-16-2020, 08:15 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    It would be great to have a nice measurement on the unit Ivano. Parts are posted and I understand Ivano alo has other projects unfinished. I just hope that your curiosity will make you build this detector soon. I...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-15-2020, 04:57 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Thank you for releasing the final 1.0 version of the software Cor. I am compiling in Arduino on a windows machine, on my Google drive you will find a complete windows package of the final version. Simply...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-15-2020, 09:02 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Why not simply try to mount a Knowles FG-23629 element in stead of the MEMS element. It seems available form Mouser and Digikey, the element is much more expensive than the Mems elements but they seem to be widely ...
    653 replies | 61095 view(s)
  • pe1pwf's Avatar
    08-07-2020, 06:33 AM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi Hendrik, Nice to hear you have something working now. The detector has improved a lot since the veroboard versions. Not just in hardware but also in software. It amazes me what the possibilities are and how...
    653 replies | 61095 view(s)
No More Results
About pe1pwf

Basic Information

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

Statistics


Total Posts
Total Posts
110
Posts Per Day
0.16
Last Post
Bat detector 09-21-2020 07:00 PM
General Information
Last Activity
Yesterday 03:20 PM
Join Date
11-11-2018