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...
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....
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...
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)
...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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,...
Hi Helge,
We know the display uses a lot of current. We have seen the question before to turn off display power completely.
This gives a problem because it can not be turned on. The display needs initializing and...
It looks like the red wire is ouput -
(Datasheet shows top view, terminal side down)
Are you using both outputs into a differential amplifier?
If you are just using one output, the other should be floating.
Kind...
Hi Blakaddr,, sorry, I was only trying to get people to think, apparently I missed some parts looking over the schematic.
The IRU LDO specifies an output capacitor with a minimum of 10uF, the text suggest to use...
It looks like you have a nice project going on there, nice video's on youtube....
In the schematic I see failrly low values of capacitors on the outputs of the voltage regulators, specially the LDO's usually require...
If you feel you hear digital noise it is not so very much important what voltage regulator you are using. It is more important to run the audio circuitry from a different voltage regulator than the digital circuits.
...
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...
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...
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...
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