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Type: Posts; User: Andy Belov

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    @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...
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    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...
  3. 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...
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    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...
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    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...
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    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...
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    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.
    ...
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    Yes, it does look very impressive. Thank you for...

    Yes, it does look very impressive. Thank you for pointing this out.
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    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...
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    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...
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    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...
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    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...
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    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:...
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    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...
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    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...
  16. 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...
  17. 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,...
  18. 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:...
  19. 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...
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    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...
  21. 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.
  22. 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...
  23. 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...
  24. 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...
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    "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...
  26. 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...
  27. 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 -...
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    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...
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    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
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    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 ...
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    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...
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    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...
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    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...
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    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...
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    T962 reflow oven test

    Just tried this reflow oven (Happybuy Reflow Oven T962): https://www.amazon.com/gp/product/B01LZYEF90/ref=ppx_yo_dt_b_asin_image_o04_s00?ie=UTF8&psc=1
    No modifications, just removed the masking tape...
  36. Thanks @ecurtz. The oven arrives on Monday....

    Thanks @ecurtz.

    The oven arrives on Monday. I'll do all the modifications.

    For the stencil, these guys offer it with the boards for $7: https://jlcpcb.com/
    Each board will cost me $0.49
    A...
  37. Thanks, @PaulStoffregen This is the first time...

    Thanks, @PaulStoffregen

    This is the first time I do the baked SMD. I'm getting this today:...
  38. Finished KiCAD PCB today and found all parts on...

    Finished KiCAD PCB today and found all parts on DigiKey for this.
    Looks like something from Star Wars.

    18239

    Teensy 4.0
    Guitar input (preamp buffer)
    Line in, out, phone out.
    Bluetooth....
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    @ghostintranslation - don't be afraid of SMD. All...

    @ghostintranslation - don't be afraid of SMD. All you need is reading glasses and an iron with a small tip.
    This is what I did to test op amp, with a chip similar to the limiter you need: 18217...
  40. Hi Orhema, Here is the USB host schematics:...

    Hi Orhema,

    Here is the USB host schematics: 18200

    Here is the PCB: 18201

    Install Teensyduino from here: https://www.pjrc.com/teensy/teensyduino.html
    Look into this example: C:\Program Files...
  41. Yeah, I know all this. Can't wait a few months...

    Yeah, I know all this.
    Can't wait a few months and i need it to be small, and with sd card on the same side as usb.
    I think I'll just risk $20 and try it. Going to order the first Pcb next week...
  42. Can I "re-bake" Teensy 4 to surface-mount it on my PCB?

    What will happen if I make a cutout in my PCB for the bottom components in the middle of T4 and use pads instead of the castellated cutouts?
    Then I'll put it in one of these:...
  43. Just found the answer:...

    Just found the answer: http://forum.pjrc.com/threads/49192-Adding-a-charging-circuit-to-a-project?highlight=load+sharing+charger
    "Load sharing" is the key phrase.
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    @defragster I was replying to this from...

    @defragster

    I was replying to this from @eegee:
    "Hey Andy - it looks like from your pictures you added a 2nd USB connection for your keyboard - is that right? I’m hoping to just use the onboard...
  45. I didn't touch the jumper, so it's on 100mA now....

    I didn't touch the jumper, so it's on 100mA now.
    I just want to see what other people use. And I want the "Battery level" indicator with a pin on the charger.
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    @eegee - I don't know if the onboard usb can be a...

    @eegee - I don't know if the onboard usb can be a host. I did add a new host USB socket with a current limiter. I took it from this board:
    https://www.pjrc.com/breakout-board-for-teensy-4-0/...
  47. Well, it's wired "by the recipe": cut the wire on...

    Well, it's wired "by the recipe": cut the wire on Teensy, VUSB goes to the charger, the battery to VCC on Teensy.

    I guess I know about the problems you describe, but I'm asking whether someone has...
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    I did it:...

    I did it: https://forum.pjrc.com/threads/57987-Got-a-MIDI-keyboard-working-with-Teensy-4-0
  49. Problem with battery charger for Teensy 4.0

    I have this charger: https://www.adafruit.com/product/2124
    It works fine if I wait for the battery to get fully charged. But if the battery is low and charging, the voltage on Teensy 3.3V output...
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    Wow, such a detailed answer, and from Paul...

    Wow, such a detailed answer, and from Paul himself! Thank you.

    I'm sure many people here can use this information.
    I'll trust your experience and will definitely mention your name.

    Really hope...
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