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

Search:

Type: Posts; User: Andy Belov

Page 1 of 3 1 2 3

Search: Search took 0.00 seconds.

  1. Just for a comparison, I've ordered 5 PCB's at...

    Just for a comparison, I've ordered 5 PCB's at JLCPCB.com, in China, ($2 for all 5) on Saturday.
    They were made in 2 days and shipped via DHL on Sunday night, for $17.
    I got them in New York on...
  2. Replies
    26
    Views
    1,298

    Just noticed that the library for it was updated...

    Just noticed that the library for it was updated 4 months ago: https://github.com/adafruit/Adafruit_CAP1188_Library
    Want to give it a try? I can do it only in about a week or two.
  3. Replies
    11
    Views
    278

    Thanks for clarifying, Paul. If this is how it...

    Thanks for clarifying, Paul.

    If this is how it works, that's fine. It just makes it difficult to understand what's happening sometimes.

    The confusing part was that the test sketch seemed to...
  4. Replies
    11
    Views
    278

    New findings. It has to do with the Teensy...

    New findings.
    It has to do with the Teensy ports, the way Arduino sees them.

    This morning, after a PC reboot, I plugged in the bare Teensy 4.1 with nothing on it.
    The port name that Arduino...
  5. Replies
    11
    Views
    278

    What Teensyduino you guys are using? I got the...

    What Teensyduino you guys are using?
    I got the latest a couple of days ago: 1.53 with Arduino 1.8.13

    I just got a new and untouched Teensy 4.1, connected the power, loaded the test, see "USB Host...
  6. Replies
    11
    Views
    278

    I ran this example, which worked fine with Teensy...

    I ran this example, which worked fine with Teensy 4.0: C:\Program Files (x86)\Arduino\hardware\teensy\avr\libraries\USBHost_t36\examples\Test\Test
    No response, no 5V.
  7. Replies
    26
    Views
    1,298

    I never got anything back from Adafruit on this....

    I never got anything back from Adafruit on this.
    It kind of worked with the delay suggested above, but overall the sensors were not usable for me - no reliable response to fast touch/release.
    I...
  8. Replies
    19
    Views
    478

    Thanks everybody for your help and advises....

    Thanks everybody for your help and advises.
    Well, turns out that all I needed was to turn up the amplification on my guitar preamp.

    I put a couple of potentiometers for that and made sure that my...
  9. Replies
    11
    Views
    278

    Teensy 4.1 - don't have +5V on USB host

    I have the USB host GND connected to the common GND. Is that the problem?
    I use my own PCB. Should I connect USB GND to the USB connector only?
    The funny thing is that there is +5V between "5V" on...
  10. Replies
    19
    Views
    478

    Thanks for the video, boxxofrobots. I do have...

    Thanks for the video, boxxofrobots.

    I do have a bunch of those capacitors, maybe not enough or not in the right places.
    Will experiment with that. Just not sure about the capacity and the...
  11. Replies
    19
    Views
    478

    Hi MatrixRat, Tried to lookup "sharp edge...

    Hi MatrixRat,

    Tried to lookup "sharp edge decoupling", didn't see anything relevant.
    Can you clarify please?
  12. Replies
    19
    Views
    478

    This is my board, with the ground highlighted....

    This is my board, with the ground highlighted. Just don't see how I can improve much there, other than do some copper fill here and there, probably on the green side.
    The whole thing is 6x8 cm.
    All...
  13. Replies
    19
    Views
    478

    Thanks boxxofrobots, I'll try the star...

    Thanks boxxofrobots,

    I'll try the star grounding in my next version of PCB. Just ordered this one from JLCPCB yesterday.
    On this version, I'll try adding components one by one and see which one...
  14. Replies
    19
    Views
    478

    @jonr. My thingy is battery-powered. Would...

    @jonr.
    My thingy is battery-powered. Would really hate to have 2 separate batteries, but I'll give it a try, just for the heck of it. The ground will still be common, though.
  15. Replies
    19
    Views
    478

    Thanks @ETMoody3 I figured out the screen...

    Thanks @ETMoody3

    I figured out the screen noise, it's quite "obvious": the noise is clearly related with what's happening on the screen.
    I'll try to find a way to turn all SPI communications...
  16. Replies
    19
    Views
    478

    Do you do copper fill on your PCB?

    I make a Teensy 4.1 based sound effects processor and have my guitar preamp very close to the Teensy and audio processor.
    I can hear some digital noise on the guitar input and want to minimize it.
    ...
  17. Replies
    11
    Views
    476

    @sockmonkey Didn't touch the library and not...

    @sockmonkey
    Didn't touch the library and not going to.
    I just need to get by to make my guitar and keyboard effects thingy to work and start making it.
    Maybe later I'll take a look at the whole...
  18. Replies
    11
    Views
    476

    My answer in two words: forget it. I've spent...

    My answer in two words: forget it.

    I've spent maybe a week trying to create/delete effects and connections between them dynamically and gave up. It works for 2 or 3 times, then the poor little...
  19. As a very responsible citizen, I go further. I...

    As a very responsible citizen, I go further.
    I not only cover with mask, but also plug some orifices to protect the others from an accidental exhaust.
    There is still so much unknown about the...
  20. Replies
    13
    Views
    868

    Jim, man, this is so sad. Ever heard of a donkey...

    Jim, man, this is so sad. Ever heard of a donkey named Eeyore?
    Put it on GitHub and post a link to it here and on arduino.cc forum.
    This is what I'm going to do.

    Just make your stuff user...
  21. Replies
    13
    Views
    868

    Thanks Matrix, This is pretty much what I have...

    Thanks Matrix,

    This is pretty much what I have now, too. I also have buttons and hope to do the scroll list this week.
    Also a text box with on-screen keyboard sometime soon.

    I have the code on...
  22. Replies
    13
    Views
    868

    Thanks Brian, This does look smooth. The...

    Thanks Brian,

    This does look smooth.
    The problem is that this kind of libraries probably depend on support for specific displays.

    I'm saving all the good things people suggest here and will...
  23. Replies
    13
    Views
    868

    Thanks Jim, I've started my own little thing...

    Thanks Jim,

    I've started my own little thing here, just what I need, which is not much. I'm half-way done.
    Looks like it may be longer to accommodate other people's things than make your own.
    ...
  24. Replies
    13
    Views
    868

    Yes, it does look very impressive. Thank you for...

    Yes, it does look very impressive. Thank you for pointing this out.
  25. Replies
    11
    Views
    476

    Any way will work. You define the connecting...

    Any way will work.
    You define the connecting points when you create the connection and can only connect/disconnect later. You cannot change the points of an existing connection.
    If you...
  26. Replies
    7
    Views
    416

    Use the low-temp paste. Takes 10 seconds to heat...

    Use the low-temp paste. Takes 10 seconds to heat up the chip, remove it, wipe off the extra paste, move the chip around to make the paste adhere to the pads only and put it back on.
    I've done it...
  27. Replies
    11
    Views
    476

    I just do "new AudioConnection(...), like you...

    I just do "new AudioConnection(...), like you show. You don't have to call ->connect(). If you don't need it, just "delete". It disconnects.
    Having them "pre-made" is a pain, as you need to give...
  28. Replies
    7
    Views
    416

    Thanks @palmerr, I'm pretty good with the heat...

    Thanks @palmerr,

    I'm pretty good with the heat gun and low-temp paste.
    The trick is to put a little paste all around, then heat up the whole chip and move it around the pad a little.
    Then the...
  29. Replies
    7
    Views
    416

    Just found this:...

    Just found this: https://www.mouser.in/datasheet/2/256/DS4420-1095341.pdf
    Looks like what I need. $3.22 on DigiKey, not bad:...
  30. Replies
    7
    Views
    416

    What programmable gain amp to use?

    I want to add a programmable gain amplifier to my Teensy-based guitar "pedal", so that I can use guitars with different pickup levels.
    I already have the buffer with gain 1, so I'll put the amp...
  31. Replies
    13
    Views
    868

    Looking for a "GUI" library for ILI9341

    I need to add a user interface to my Teensy 4 with ILI9341 touchscreen.
    Looking for common things like edit boxes, scroll lists, on-screen keyboard, some kind of menu selectors, etc.

    Can do it...
  32. Got this:...

    Got this: https://learn.adafruit.com/adafruit-airlift-featherwing-esp32-wifi-co-processor-featherwing/overview
    Giving up after a few hours.
    Getting "Communication with WiFi module failed!" in...
  33. Thanks @prickle. Those little invisible to me...

    Thanks @prickle. Those little invisible to me things would be killing me. Never in my life I'd figure out that the damn thing doesn't work just because I need 100 Ohm resistor here or there.
    Well,...
  34. I think I'll try what @MichaelMeissner suggested....

    I think I'll try what @MichaelMeissner suggested. I didn't know that ESP32 had both WiFi and Bluetooth.
    I'll get this:...
  35. Thanks guys. I found this:...

    Thanks guys.

    I found this: http://www.digikey.com/product-detail/en/espressif-systems/ESP-WROOM-02/1904-1009-1-ND/8544304
    It's $2.70, which is important because I want to sell my "super awesome...
  36. Replies
    0
    Views
    157

    Need help with battery charger

    I got the schema from here: https://blog.zakkemble.net/a-lithium-battery-charger-with-load-sharing/
    The battery is charging at 100ma. I checked it using the jumpers for this purpose.
    The diod gets...
  37. Ok, thanks. I guess I'll just connect it and see...

    Ok, thanks. I guess I'll just connect it and see how it goes. It it works, I may ditch the Bluetooth in favor of WiFi.
  38. Who has ESP8266 (WiFi) working with Teensy 4.0?

    I did search this forum for this, but didn't see any definitive guide or results.

    Looks like for a few dollars more I can add a WiFi to my setup.
    If anybody has it working with Teensy 4.0, please...
  39. It works with the modified example I've posted on...

    It works with the modified example I've posted on 10-06-2019, 07:19 PM above.
    One thing I've noticed is that you have "TFT_RST 8". Don't know if there is a point in this, as it has to be on +3.3V...
  40. Well, the "flat-baking" of Teensy worked the...

    Well, the "flat-baking" of Teensy worked the first time and that's it. Tried 2 more time and wold get shorts all the time. It's hard to control the paste between the boards.
    Gave up on that, ordered...
  41. Replies
    0
    Views
    177

    "Phaser" sound from microphone

    I just tested my PDB's audio part, which is a "reflow" of Paul's Audio Board.
    The Guitar sketch works (synthesis), line input, phones, lien out work.
    The microphone works, but the sound is like the...
  42. Also, please shout out if you know why you can't...

    Also, please shout out if you know why you can't rely on a low-temperature paste for production.
    The actual melting temperature of the paste is 137C. It's just the oven's lowest stock profile goes...
  43. It worked! At least the parts I tested. Got the...

    It worked! At least the parts I tested.
    Got the first PCB with SMD parts in my life. All designed by myself.
    Got a bare Teensy put some paste on the PCB, shoved them in the oven.

    First time -...
  44. Replies
    9
    Views
    495

    Someone on another thread just mentioned that I...

    Someone on another thread just mentioned that I can create dynamic object for the connections.

    I always was thinking of Arduino as "build and run" concept. Make a bunch of objects in setup() and...
  45. Replies
    3
    Views
    422

    Wow, I didn't know about that. I just saw it...

    Wow, I didn't know about that. I just saw it always being static.
    This is really all I need, then. I'll try it tonight.

    Thanks @JarkkoL
  46. Replies
    9
    Views
    495

    Thanks, Chip. I see what you do there and it...

    Thanks, Chip.

    I see what you do there and it sounds good.
    Still, I want to stay with the 'standard teensyduino'. Too many things to manage for now.
    So much easier to ask someone else to do it ...
  47. Replies
    9
    Views
    495

    I already submitted the enhancement request. I...

    I already submitted the enhancement request.
    I think the static links cripple such a unique and powerful audio library that we have here.

    I was waiting for something like this for years, while...
  48. Replies
    3
    Views
    422

    Dynamic AudioConnections

    Would be nice to be able to change source and destination of AudioConnections at runtime.
    This way we can dynamically connect anything to anything instead of hard-wiring.

    The change should be...
  49. Replies
    9
    Views
    495

    Thanks, @neurofun. This is what I'm doing now....

    Thanks, @neurofun.

    This is what I'm doing now. I wanted to let the users to arrange the effects in any sequence they want, so the number of all possible connections would be in a couple of...
  50. Replies
    9
    Views
    495

    Changing effects at run time

    I'm making a guitar effect thingy based on Teensy 4 and I want the user to be able to select one or more effects and their sequence of processing.
    I know some effects have a pass through mode and...
Results 1 to 50 of 119
Page 1 of 3 1 2 3