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  1. Thanks Frank! No need to feel to sorry for me......

    Thanks Frank! No need to feel to sorry for me...

    Paul
  2. Couldn't resist and was already comparing...

    Couldn't resist and was already comparing C:\Program Files (x86)\Arduino\hardware\teensy\avr\cores\teensy3\usb_audio.cpp and C:\Program Files...
  3. Good find! I verified on a Teensy 4.0 as well and...

    Good find! I verified on a Teensy 4.0 as well and indeed mute is not working [the slider volume does].
    On a Teensy 3.2, mute does work [as well as the slider volume].
    Used this code to verify on...
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    Just curious; which application are you using? ...

    Just curious; which application are you using?

    And how is the PCM2900 circuit actually implemented? According to one of the "typical circuit connections" as mentioned in the datasheet?

    Paul
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    On the product page...

    On the product page of the PCM2900, under Features, it is stated that the chip supports "Human Interface Device (HID) Volume Control and Mute Control".
    Could it be that on these various Windows 10...
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    Agree with TeensyWolf, a CAN bus analyzer like...

    Agree with TeensyWolf, a CAN bus analyzer like this one, saved me a lot of time while debugging a Teensy-based CAN bus device.

    Paul
  7. 25045 Paul

    25045

    Paul
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    Like Frank B, I vaguely remember that I have been...

    Like Frank B, I vaguely remember that I have been playing with the TDA1543A as well.
    But I also could not find the chips in my drawers anymore...
    Since I have a working setup with the TDA1543 non-A...
  9. 5K+ Stock here:...

    5K+ Stock here: https://www.chipsmall.com/Products/MK66FX1M0VMD18_13204072.html.
    Another HK-based supplier.

    Paul
  10. Sorry to hear. Just curious, what was the issue?...

    Sorry to hear. Just curious, what was the issue? Availability? Payment conditions?

    Paul
  11. Agree. As far as I see on the schematic, the...

    Agree.

    As far as I see on the schematic, the only other pins of the processor that could be influenced by the Vin, are pins USB1_VBUS & USB2_VBUS [called USB_OTG1_VBUS & USB_OTG2_VBUS in the...
  12. If I read the datasheet...

    If I read the datasheet correctly, the maximum dropout voltage can be 475mV:

    24991

    So, it's wise to supply at least 3.775V to the Vin pin.

    Regards,
    Paul
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    Could you powerdown and powerup your PC for a...

    Could you powerdown and powerup your PC for a test? [not a Windows Restart but a complete power down].
    When my desktop PC was still running Windows 7, every once in a while I had to do this...
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    Hi Srendi, You may want to select your COM...

    Hi Srendi,

    You may want to select your COM port from the upper "Teensy Ports", like this:

    24970

    From your serial monitor snapshot it looks like you selected your COM port from the lower...
  15. My first thought was a power-only USB cable but...

    My first thought was a power-only USB cable but you tested that apparently.
    Did you try another PC/laptop? Did you plug in the USB cable all the way into the Teensy LC USB connector?

    Regards,...
  16. Blueschip seems to 4K+ parts on stock:...

    Blueschip seems to 4K+ parts on stock: https://www.blueschip-store.com/parts/MK66FX1M0VMD18/710964.html
    Not familiar with Blueschip though - only know that they are Hong Kong based.

    Regards,
    Paul
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    When you plug in the USB cable to the Li-Po...

    When you plug in the USB cable to the Li-Po backpack, which LEDs on the backpack light up? And what is the voltage on the BAT pin that connects to the Teensy 3.2 Vin pin? Do you have the battery...
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    PJRC supplies several example audio files, you...

    PJRC supplies several example audio files, you can find them here.

    Regards,
    Paul

    PS: you know about the CODE tags to make your post more pleasantly readable?
    24939
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    I'm not sure the A flavor of THD1543...

    I'm not sure the A flavor of THD1543 requires/expects 24/32 bits. It's a 16bit DAC after all. The attached datasheet doesn't mention it as far as I can tell.
    Perhaps you should give this code a...
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    Is there a reason that you don't use the supplied...

    Is there a reason that you don't use the supplied Teensy Audio Library? The TDA1543A is supported according to this page [top row].

    Regards,
    Paul
  21. "So you are saying that I should take the fuse...

    "So you are saying that I should take the fuse out": Yes.
    "and just connect VBUS directly to GND?" No. Because that will short the VBUS from your laptop. Just leave VBUS unconnected.

    Since you...
  22. If you connect the fuse to GND as in screenshot...

    If you connect the fuse to GND as in screenshot #2, you effectively short the USB power [VBUS] to ground, which will trip fuse F1 [or the fuse at the laptop side on the VBUS, whichever one is faster...
  23. You're welcome. Happy to hear the LC is still OK....

    You're welcome. Happy to hear the LC is still OK.
    About the Vin pin: when you connect the Teensy LC with a USB cable to a PC, the output voltage on that Vin pin will be the USB 5V. You can pull...
  24. It looks like you connected the 5V of the...

    It looks like you connected the 5V of the joystick to the Vin pin of the Teensy LC.
    Please connect it to the 3V3 pin of the Teensy LC.
    The Teensy LC pins are only 3V3 rated...hope the board and/or...
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    Looking forward to your creation! Paul

    Looking forward to your creation!
    Paul
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    You have to add a potmeter yourself with the...

    You have to add a potmeter yourself with the aliexpress pedal though...
    "The notched wheel is not in the right format for the Dunlop potentiometer" according to the comments.

    Paul
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    Or even cheaper and stereo:...

    Or even cheaper and stereo: https://www.thomann.de/de/lead_foot_lfv2.htm
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    What about this one:...

    What about this one: https://www.thomann.de/de/lead_foot_lfx1.htm?
    Or this one: https://www.thomann.de/de/lead_foot_lfv1.htm

    Paul
  29. Just did a quick test with a joystick and Teensy...

    Just did a quick test with a joystick and Teensy LC:

    24674

    Ran the basic example and executed joy.cpl on Win10:

    24675

    All looks good.
    Paul
  30. Allright. Did you try another joystick? What kind...

    Allright. Did you try another joystick? What kind of joystick are you actually using?

    Paul
  31. Between screen and keyboard there is usually...

    Between screen and keyboard there is usually little room; did you mean between chair and keyboard?

    On topic now: for debugging it's best to strip down the code to the bare minimum, test it and...
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    When you run the I2C_scanner program on the...

    When you run the I2C_scanner program on the Teensy, you won't find its I2C address because the Teensy acts as the I2C host. The I2C scanner only detects I2C slaves.

    Regards,
    Paul
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    I think I know where the confusion comes from:...

    I think I know where the confusion comes from: long time ago I was tought at school this:
    24594

    The curved line on the polarized cap indicated the negative pin.

    Agree, an explicit '+' sign is...
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    I'm pretty sure that the 100nF cap mounted on the...

    I'm pretty sure that the 100nF cap mounted on the board, shown on this page, is not a polarized version. A 100nF ceramic cap will suffice here.

    Paul
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    Thanks Rolf, You might be interested in the...

    Thanks Rolf,
    You might be interested in the measurements I did as well on several DAC's.

    Paul
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    Hallo Rolf, Thanks for your reply. I was...

    Hallo Rolf,
    Thanks for your reply. I was wondering what A/D-converter you were using for your measurements. Some USB audio device?

    Paul
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    Hallo Rolf, Just curious: what measurement...

    Hallo Rolf,
    Just curious: what measurement program did you use and what ADC?

    Danke,
    Paul
  38. Thread: I2S on Teensy4.1

    by PaulS
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    Most probably yes. But you can easily verify that...

    Most probably yes. But you can easily verify that by commenting out the line filter1.frequency(30); // filter out DC & extremely low frequencies and check again with Audacity.

    Paul
  39. Thread: I2S on Teensy4.1

    by PaulS
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    Maybe this...

    Maybe this post helps?

    Paul
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    Hi Manitou, what voltage do you power the DAC...

    Hi Manitou, what voltage do you power the DAC board with: 3V3 or 5V?
    The board you referred to should be powered by 5V.

    Paul
  41. MISO1 is actually brought out on the Teensy 4.0....

    MISO1 is actually brought out on the Teensy 4.0. Just below the card on this page, it states "Not shown on this reference card, Pin 0: CS1, Pin 1: MISO1"

    24298

    Paul
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    First unofficial Arduino IDE support for the...

    First unofficial Arduino IDE support for the Pico: YouTube and on Github.
    From the video:

    24204

    @3m31s: "And as last time, the Teensy 4.1 is in a different class" :cool:

    Paul
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    This (https://github.com/peregrine-developments)...

    This was the first hit when I googled for "Peregrine Developments".
    Is that what you are looking for?

    Paul
  44. Hi Kevin, Your wiring diagram "Attachment...

    Hi Kevin,

    Your wiring diagram "Attachment 24027" does not show up:

    Paul
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    Whether those dinosaur versions are supportive of...

    Whether those dinosaur versions are supportive of x64, I don't know. Perhaps the quickest way to find out is to install those old versions and try it out?

    Regards,
    Paul
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    Yes, it does. Until recently, I ran Teensyduino...

    Yes, it does. Until recently, I ran Teensyduino on Windows 7 x64 Pro before upgrading to Windows 10.

    Regards,
    Paul
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    Here is another interesting video:...

    Here is another interesting video: https://www.youtube.com/watch?v=_PfUEnkqeOs

    Both reviewers had not noticed though that this yellow board has the cinch jacks reversed. The jack with the red...
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    The board...

    The board I referred to has 3 voltage regulators: the charge pump [pin 1] is powered separately, not interfering with the analog power.
    Also the 1000uF caps at the output of the 3V3 regulators is a...
  49. This strongly suggests that the button input pins...

    This strongly suggests that the button input pins on the 5V Device are pulled up to 5V and that an external button [or a Teensy pin in your case] pulls that line low. Problem is that this 5V pullup...
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    @MichaelM, I think you mean the SN74AHCT125N...

    @MichaelM, I think you mean the SN74AHCT125N part, isn't it? The one with TTL level input [VIH = 2V].
    The non-T part has an VIH of 3.85V at 5.5V VDD.

    Regards,
    Paul
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