Forum Rule: Always post complete source code & details to reproduce any issue!

Search:

Type: Posts; User: linuxgeek

Page 1 of 10 1 2 3 4

Search: Search took 0.01 seconds.

  1. Replies
    10
    Views
    1,467

    Cool seeing it with the lights on the megaphone,...

    Cool seeing it with the lights on the megaphone, nice touch.

    When I did the dalek voice coder, I kinda liked the triangle waveform


    sine1.begin(WAVEFORM_TRIANGLE);
  2. Replies
    9
    Views
    1,345

    Glad you are making progress. How does the audio...

    Glad you are making progress. How does the audio sound in audacity? After converted?

    You can silence or fade the end of the sample in audacity. Pick a zero-crossing to start and end anything you...
  3. Replies
    9
    Views
    1,345

    Is it running on battery power only? If not,...

    Is it running on battery power only? If not, could help.

    Could be the microSD card. It's a big power draw and can induce noise in my experience, although I've only worked with writing to microSD...
  4. Not sure if it's your problem, but I'm fairly...

    Not sure if it's your problem, but I'm fairly sure it should be "\" in windows and not "/" for path separator.
    If you do it that way I'm not sure if you have to escape the special character

    ...
  5. Replies
    16
    Views
    8,798

    That's a great idea!

    That's a great idea!
  6. Ok, just wired up a 2k ohm resistor to 3.3V on...

    Ok, just wired up a 2k ohm resistor to 3.3V on SCL and SDA pins. You need a 2k resistor for the SCL pin to 3.3V, and you need another 2k resistor for the SDA pin to 3.3V. Then it came up, and this...
  7. Well, I must've forgotten how I wired it. It...

    Well, I must've forgotten how I wired it. It definitely doesn't work as-is. For testing, look under i2c_t3 menu for the "basic_scanner" sketch. It checks all i2c addresses for an acknowledgement.
    ...
  8. Did you setup i2c_t3 with the I2C_PULLUP_EXT in...

    Did you setup i2c_t3 with the I2C_PULLUP_EXT in the begin function?

    I'll try and post a simple sketch later. I might have done more of my testing on 3.2, but I'll try it on LC.

    I doubt there is...
  9. I've likely used that same MPU6050 breakout...

    I've likely used that same MPU6050 breakout board. I got 10 of them off of ebay once....
  10. Replies
    16
    Views
    8,798

    That's awesome! Nicely done. That looks really...

    That's awesome! Nicely done. That looks really nice from an 8x8 grid.

    I wonder if there is a clever way to create a heat map of an area by repeatedly panning over a certain area. Basically, use...
  11. Replies
    1
    Views
    819

    TechShop closed

    I thought some people on here might be interested to know that TechShop closed their doors this last wednesday.

    Disappointing. :(
    ...
  12. I think that basic functionality as described...

    I think that basic functionality as described would be very valuable.

    In the long run, I think it would be worthwhile to have it use the same method as the audio library. Would it make sense to...
  13. What I'd like to see is extending the Audio...

    What I'd like to see is extending the Audio Library to fill queues with other ADC pins.

    This doesn't quite make sense to pass a bunch of pins with a constructor but you get the idea.

    This would...
  14. Replies
    3
    Views
    1,149

    In audacity, you have to import as raw audio. You...

    In audacity, you have to import as raw audio. You can then export it as wav file.

    On the post about neutronned's mic, you'll find more code.
  15. Not sure about the bins, but your results might...

    Not sure about the bins, but your results might improve if you can standardize the hammer hit with an apparatus.

    Also something like a boundary microphone might be helpful:...
  16. Replies
    11
    Views
    3,987

    This really seems like it's much easier now. With...

    This really seems like it's much easier now. With the new teensyduino, I'll have to give this a go. Especially since I switched to the new version of sublime and it's really sluggish on linux.
  17. Replies
    8
    Views
    2,472

    In case it wasn't clear, that last link I gave...

    In case it wasn't clear, that last link I gave was to an automatic timer for an electrical outlet. I plug the charger into that and set it to turn off the electrical outlet after 1,2,4,or 8 hours....
  18. Replies
    37
    Views
    11,218

    Wow, adafruit has been busy. I see they have...

    Wow, adafruit has been busy. I see they have mynewtOS on the nrf52 feather. Any experience with that?

    I think if you could be less than $50 that would be good.
  19. Replies
    8
    Views
    2,472

    Same size as AA. BTW, you can use dummy versions...

    Same size as AA.
    BTW, you can use dummy versions (or just add wire in unused AA slots that are wired in series) to use these to replace AA batteries, and get much greater battery life.

    In other...
  20. Replies
    37
    Views
    11,218

    Yeah, I think the pricing is in your favor as...

    Yeah, I think the pricing is in your favor as this is clearly not a teensy replacement. It's a specialized version. Are you buying the bootloaders from Paul? If you are, likelier to be OK.

    I also...
  21. Replies
    8
    Views
    2,472

    I use the 14500 batteries. These are 2000mAh:...

    I use the 14500 batteries. These are 2000mAh:
    https://www.amazon.com/gp/product/B00PIDNTRA/

    I also have them in 1000mAh, but can't find the link right now.
  22. Replies
    37
    Views
    11,218

    Just to be clear, this is essentially a teensy...

    Just to be clear, this is essentially a teensy with an ntf52 on board that communicates with the teensy over serial? I'm assuming that's why there's 2 micro-USB connectors (one for teensy portion,...
  23. I think you can power it from the 3.3V pin on the...

    I think you can power it from the 3.3V pin on the teensy. If that doesn't work, you could use the 5V, but I would wait until someone else chimes in as I'm not positive.

    Also, I think the "INT" or...
  24. Replies
    12
    Views
    2,645

    Ahhh, I was thinking he already had an input, but...

    Ahhh, I was thinking he already had an input, but I guess it was just outputting a sine wave so it wasn't. Thanks.
  25. Replies
    12
    Views
    2,645

    Yeah, I did, didn't see anything about...

    Yeah, I did, didn't see anything about AudioOutputI2S.
  26. Replies
    12
    Views
    2,645

    I think he was wondering about why you need to...

    I think he was wondering about why you need to declare this: AudioOutputI2S out1

    I've been confused by this as well. I'm not sure he does need that declaration.
  27. Replies
    9
    Views
    3,259

    Do the sensors stop working completely, or just...

    Do the sensors stop working completely, or just the humidity sensing? Does temperature and pressure sensing continue to work? Am interested in what you eventually find is the problem.

    I haven't...
  28. I'm using an electret mic, but the gain is fine...

    I'm using an electret mic, but the gain is fine w/headphones or line out.

    It was just the output over USB. I'm not sure why cause I had it working in another sketch at nice levels.

    I'll try and...
  29. I tried recording it to USB but the gain was...

    I tried recording it to USB but the gain was really low. Not sure why.

    I mainly came here to say that I found this site:
    http://webaudio.prototyping.bbc.co.uk/ring-modulator/
  30. I was just thinking about a Dalek simulation. I'm...

    I was just thinking about a Dalek simulation. I'm gonna have to try this out. Thanks for posting, I was thinking not enough time before halloween to try something.

    "Exteeerminaaate"

    I think...
  31. Replies
    4
    Views
    1,315

    Could you post a pic of what it looks like when...

    Could you post a pic of what it looks like when it appears to be working?

    The amplitude seems too small to expect that you would capture anything physiologic or even external noise: ~0.1uV

    It...
  32. I think I remember that you can't even turn them...

    I think I remember that you can't even turn them by hand, cause of the gears probably.
  33. Don't those stepper motors stay put when you turn...

    Don't those stepper motors stay put when you turn off the power? If the teensy went to sleep, I think it would just stay where it is.

    Do you need it to be refreshing the needle position all the...
  34. Replies
    17
    Views
    3,492

    There's people on here who know a lot more than...

    There's people on here who know a lot more than me and I might just add to the confusion, so I'll hold off with any technical suggestions.

    Out of curiousity, do the neurons actually fire (action...
  35. Replies
    159
    Views
    40,158

    Is it possible to record from 2 mics on different...

    Is it possible to record from 2 mics on different ADC inputs and save to sdcard?

    I believe the audio board can do this with i2s for line-level input, but maybe that's just for outputting over USB.
  36. Replies
    15
    Views
    4,217

    lsb_release -a Distributor ID: Ubuntu...

    lsb_release -a
    Distributor ID: Ubuntu
    Description: Ubuntu 16.04.3 LTS
    Release: 16.04
    Codename: xenial

    uname -a
    Linux xx 4.10.0-35-generic #39~16.04.1-Ubuntu SMP Wed Sep 13 09:02:42 UTC 2017...
  37. Replies
    159
    Views
    40,158

    FYI, did some testing here with frequency plots:...

    FYI, did some testing here with frequency plots: https://forum.pjrc.com/threads/46701-power-stability-for-uSD-card-writing?p=155015&viewfull=1#post155015
  38. Replies
    6
    Views
    1,656

    I ordered some parts, but in the meanwhile I did...

    I ordered some parts, but in the meanwhile I did a little testing. I soldered everything and shortened the wires.

    With the audio board and the provided electret mic from pjrc, I get some 172...
  39. Replies
    6
    Views
    1,656

    Thanks, good to know about the low ESR, makes...

    Thanks, good to know about the low ESR, makes sense as I read about that now. I'm glad I know now so that I don't have to pay shipping again to get this later.

    I see that the ARef pin is on the...
  40. Replies
    6
    Views
    1,656

    Is the 3.3V input on the teensy considered Aref?...

    Is the 3.3V input on the teensy considered Aref?
    I'll try it a couple different ways and see, but I just wanted to make sure I was understanding correctly.

    Power draw will be just sdcard writing...
  41. Replies
    6
    Views
    1,656

    power stability for uSD card writing

    I've been looking through posts and see others have tried stabilizing power for other high current draw components.
    I've seen this component tried:...
  42. Replies
    159
    Views
    40,158

    I wasn't thinking of phantom power, just getting...

    I wasn't thinking of phantom power, just getting better audio quality with low-cost, low-power components.
    I tried reading up on how to hook up an electret mic with balanced connections, but didn't...
  43. Replies
    159
    Views
    40,158

    Looks like mine will arrive tomorrow. Any way...

    Looks like mine will arrive tomorrow.

    Any way to take advantage of the differential ADC inputs (the bottom pads)? Either in the current form, or a future design? My understanding is that it gets a...
  44. That's pretty remarkable stuff!

    That's pretty remarkable stuff!
  45. Replies
    159
    Views
    40,158

    Interesting, maybe it's my wire length on the...

    Interesting, maybe it's my wire length on the microphone on the audio board. Are you running off of batteries?
    Are you using the uSD card suggested by pjrc? That one arrives tomorrow for me, so I'll...
  46. Replies
    159
    Views
    40,158

    I forgot to mention that I see the peak when I...

    I forgot to mention that I see the peak when I analyze a silent portion of the audio signal. Did you analyze a silent portion?
  47. Replies
    159
    Views
    40,158

    If you analyze the spectrum in audacity do you...

    If you analyze the spectrum in audacity do you see a peak at 172Hz in either of the recordings?

    I get a 172Hz peak with the audio board, where it writes to the uSD card 172x a second.

    Would you...
  48. Does audio board support mic-in on 3.5mm jack?

    Simple question. It's not clear to me that the teensy audio board's 3.5mm jack supports mic input. Or do you have to wire directly to the MIC/GND input?

    I tried getting the 3.5mm jack to work for...
  49. Replies
    159
    Views
    40,158

    In that testing, you aren't using a uSD card....

    In that testing, you aren't using a uSD card. Right? So I imagine these spikes are due to the digitial signals of i2s or something similar. I wonder if you can adapt the recorder.ino sketch to...
  50. Replies
    159
    Views
    40,158

    the microphone module looks nice. A couple of...

    the microphone module looks nice. A couple of questions.

    Does the mic sound better than the teensy audio board with a mic connected to the input?
    Does it help with power draw spikes when...
Results 1 to 50 of 500
Page 1 of 10 1 2 3 4