Forum Rule: Always post complete source code & details to reproduce any issue!
Tab Content
  • pe1pwf's Avatar
    02-25-2021, 05:51 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I just used a small bluetooth audio transmitter/receiver bought for a few bucks on aliexpress. It uses an usb connector for powersupply and has two audio jacks. One is for the RX and one for the TX function. A small...
    701 replies | 78737 view(s)
  • pe1pwf's Avatar
    02-22-2021, 10:07 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    I don't know why I have the Z version in the parts list. Probably because the CAD program lists that one an not the 3, 3.3 and 5V versions but the Z as generic. If I have to work on the manual I will update the...
    701 replies | 78737 view(s)
  • pe1pwf's Avatar
    02-22-2021, 05:19 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Hi David, You are too late, the bats just woke up last evening... well at least here they did, I heard some pipistrelle, serotinte and plecauri but I guess that is just because of the warm weather we suddenly have...
    701 replies | 78737 view(s)
  • pe1pwf's Avatar
    02-06-2021, 07:20 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    Whoops, I accidentally took out the wrong connections to the audioboard. I don't know how I managed to do that, but this should be the right schematic.
    701 replies | 78737 view(s)
  • pe1pwf's Avatar
    02-04-2021, 09:05 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    As promised a few pictures.... Notice the ferrtite bead on the wires of the GPS module this to help keep the RFI out. I also use a switch in the GPS powerline. The GPS unit draws quite a bit of curent, if I do not...
    701 replies | 78737 view(s)
  • pe1pwf's Avatar
    02-03-2021, 09:52 PM
    pe1pwf replied to a thread Bat detector in Audio Projects
    The GPS turned out to be quite a struggle. The code running in the Teensy and all the data lines being switched make a lot of noise. The GPS unit is very close to the busy Teensy and has problems with RFI. You have to...
    701 replies | 78737 view(s)
  • pe1pwf's Avatar
    02-03-2021, 06:14 PM
    These are nice values to start with. It kind off depends on the current drawn, and the space that is available. If too much voltage drops over the resistor lower the value and of possible increase the cap. If you...
    9 replies | 330 view(s)
  • pe1pwf's Avatar
    02-03-2021, 02:48 PM
    These step-up modules generally are noisemakers. It is always a good idea to consider and extra capacitor. I do like to use RC filters so a few ohms resistor followed with a big capacitor, that will create a little...
    9 replies | 330 view(s)
  • pe1pwf's Avatar
    02-03-2021, 11:32 AM
    I guess I would start by disconnecting 3v3 of the teensy to the audioboard bit power the audioboard from a separate 3v3 regulator. The audioboard is designed to connect directly to the teensy, but keep the 3v3 power...
    26 replies | 1186 view(s)
  • pe1pwf's Avatar
    02-03-2021, 11:05 AM
    It looks like you have a CR2032 battery on the 3v3 circuit? It guess you actually want to have that on the Vbat pin. Or is this ment to be a big capacitor? I know upon writing on these sd cards they can draw a lot of...
    9 replies | 330 view(s)
  • pe1pwf's Avatar
    01-26-2021, 05:37 AM
    Thank you for your replies, materials like fx5 are new to me I will look into that. My detector is portable only about 3x5x1.5 inches the Teensy is just about in the middle and the display is covering most of the...
    9 replies | 261 view(s)
  • pe1pwf's Avatar
    01-24-2021, 11:45 AM
    Thanks Paul, I have a resistor in every dataline (150 ohms). The TeensyBat detector already needed them to keep the the noise out of the bat sound recordings. I'm afraid an external antenne in the windowstill is not...
    9 replies | 261 view(s)
  • pe1pwf's Avatar
    01-24-2021, 10:52 AM
    I tried several power sources, and planned it to be running from the "powerbank" that also powers the Teensy via a small RC filter. It already proved to be hard to keep all the data signals and pulsed power users like...
    9 replies | 261 view(s)
  • pe1pwf's Avatar
    01-24-2021, 09:05 AM
    Hi there, I am using a Teensy 3.6 audio project using the audioboard getting samples on a high rate and a displaying waterfall or spectrum on an Ili9341 3.2" display. (Teensy bat detector thread). Since I wanted...
    9 replies | 261 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
131
Posts Per Day
0.16
Last Post
Bat detector 02-25-2021 05:51 PM
General Information
Last Activity
Today 07:54 PM
Join Date
11-11-2018