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    Got it, thanks! Latest KiCad footprints with 3d...

    Got it, thanks! Latest KiCad footprints with 3d models here: https://github.com/blackketter/teensy.pretty
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    I measured the tallest parts on the back as being...

    I measured the tallest parts on the back as being about 0.7mm high.
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    Thanks Mark, it looks good but whoa, that is big!...

    Thanks Mark, it looks good but whoa, that is big! Not sure if it makes sense to use a 118MB model in the footprint library. I think I'll just use Jack's for now.
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    Ah, I missed that! I think KiCad needs STEP...

    Ah, I missed that! I think KiCad needs STEP files, so hopefully we can get conversions to that...
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    Looks good! Would you mind if I included it with...

    Looks good! Would you mind if I included it with the KiCad footprint for the Teensy here: https://github.com/blackketter/teensy.pretty

    If that's ok, let me know how you'd like credit.

    Pin...
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    I've been thinking about this problem too and...

    I've been thinking about this problem too and decided to use a second Arduino board (Teensy LC?) and connect the two of them via a serial or i2c connection. Then it's a small matter of software.
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    +1 For PlatformIO! PlatformIO uses the same...

    +1 For PlatformIO!

    PlatformIO uses the same tools and code from the Teensyduino installer, so it should be equivalent. There is sometimes a lag between Teensyduino releases and when that code...
  8. A few more questions: - How much data are we...

    A few more questions:

    - How much data are we talking about? 5kB? 50kB? 50MB?
    - How fast do you need the parsing to be?
    - Can the parsing happen once at boot time and then be cached in a faster...
  9. Try putting another resistor in series with the...

    Try putting another resistor in series with the switch to form a voltage divider. A 270k resistor will put the pin at 100k/(270k+100k)*12 or about 3.24v.
  10. That matches what I've measured with my (cheap)...

    That matches what I've measured with my (cheap) calipers. Here's a high(ish) resolution photo of my beta board front:

    20079
  11. Yes, the ethernet connector 2mm spacing and is...

    Yes, the ethernet connector 2mm spacing and is centered between pins 20 and 21. It also has smaller holes, appropriate for the smaller 2mm pins.

    Also, I believe that the vertical (in your...
  12. I measured the 2mm spacing ethernet header to be...

    I measured the 2mm spacing ethernet header to be centered between pins 20 and 21, and the centers of the closest pair of ethernet pins 0.1" below those two pins.

    The USB Host pins appear to be in...
  13. If you are using KiCad, I made a footprint, which...

    If you are using KiCad, I made a footprint, which has been merged here: https://github.com/XenGi/teensy.pretty

    Symbol here: https://github.com/XenGi/teensy.pretty


    These have not been...
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    The silicone top buttons in the Behringer device...

    The silicone top buttons in the Behringer device are likely made from a rubber key mat that has conductive carbon "pucks" at the bottom. When pressed, those short out contracts on a PCB underneath. ...
  15. Ha, sorry, that's important information. Here's...

    Ha, sorry, that's important information. Here's the repo for the cores: https://github.com/PaulStoffregen/cores
  16. Paul committed @sliverlock's change to the cores...

    Paul committed @sliverlock's change to the cores directory, so the T4 RTC should work correctly across power cycles (assuming there's a battery on VBAT) in the next beta release.
  17. I can confirm that Silverlock's fix works for me...

    I can confirm that Silverlock's fix works for me on T4 as well.

    Have you considered submitting a patch for this?
  18. If you are willing to step away from the Arduino...

    If you are willing to step away from the Arduino IDE, try out PlatformIO. https://platformio.org

    You can specify specific versions of libraries on a per-project basis, both from different sources...
  19. There's another Teensy board in beta now, based...

    There's another Teensy board in beta now, based on Teensy 4.0, called 4.1. :)

    You can see some discussion of it here: https://forum.pjrc.com/threads/60532-Teensy-4-1-Beta-Test
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    Ah, ok. Can anybody with one confirm that it's...

    Ah, ok. Can anybody with one confirm that it's just wires and connectors?
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    I can't seem to find a reference for the circuit...

    I can't seem to find a reference for the circuit needed for the ethernet port. Is it as simple as wiring a RJ-45 with integrated magnetics and maybe a current limiting resistor for the LED?
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    I've only used serial to connect to an ESP32, but...

    I've only used serial to connect to an ESP32, but hope to use the WifiNina firmware soon. Can you show the pins you are using to connect the two?
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    The 5v pin on the 5-pin USB Host connector is...

    The 5v pin on the 5-pin USB Host connector is connected to the output USB current limit switch on the Teensy 3.6. You'll need to splice the connector and feed the 5v from the hub to the VUSB pin on...
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    I went ahead and added it. Here's what the...

    I went ahead and added it. Here's what the symbol looks like:

    19857
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    Great, thanks! One question: Is there value in...

    Great, thanks!

    One question: Is there value in putting locations for pogo pins to connect to the USB device pads in the KiCAD footprint?
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    2mm pitch pin header. Something like...

    2mm pitch pin header. Something like https://www.digikey.com/product-detail/en/metz-connect-usa-inc/PR20C03VBDN/1849-1000-ND/7794765 should work.
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    I've made KiCAD symbols and footprints based on...

    I've made KiCAD symbols and footprints based on the beta sample I received yesterday.

    Available here:

    Symbols: https://github.com/blackketter/teensy_library

    Footprints:...
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    Excellent! I added some feedback to the pull...

    Excellent! I added some feedback to the pull request.


    Have you considered using the exiting Teensy RX6/TX6 to the ESP32 TXD0/RXD0 for communications? It won't be fast, but the I2C isn't that...
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    "Bottom pins" means footprints for the memory...

    "Bottom pins" means footprints for the memory chips?
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    Got mine! Thanks. Looks great! I'm putting...

    Got mine! Thanks. Looks great!

    I'm putting together KiCAD symbols and footprints for it.

    A few initial questions:

    What are the pins along the interior, near the back side of the SD...
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    good idea to have a footprint, @jayshoe! Happy...

    good idea to have a footprint, @jayshoe! Happy to take a look at a pull request for it.
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    He he. Yes, it's the same as Teensy 4.0, except...

    He he. Yes, it's the same as Teensy 4.0, except where it's different. :)

    It's the details of those differences that really matter. The Teensy schematics are really useful, just hoping that a...
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    Looking forward to getting my board. Any chance...

    Looking forward to getting my board. Any chance for a draft schematic?
  34. Looks great, Craig. I hope they come back into...

    Looks great, Craig. I hope they come back into stock!
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    I think that you want the I2S port on the ESP32...

    I think that you want the I2S port on the ESP32 connected to an I2S port on the T4, out to in and in to out. They'd share a BCLK and LRCLK, one driving the other. MCLK shouldn't be needed because...
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    Hi @jayshoe. Thanks for the kind words. ...

    Hi @jayshoe. Thanks for the kind words.

    Are you trying to connect the ESP32 to the T4 via I2S to stream audio between them?

    In that case you'd need to connect one of the T4 I2S interfaces...
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    I'm looking at the Guitar example and don't see...

    I'm looking at the Guitar example and don't see where the sample rate is hard coded? I do see a list of note frequencies in Hz, which would stay the same. It uses the AudioSynthKarplusStrong...
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    That depends on what you mean by "acceptable". ...

    That depends on what you mean by "acceptable". :) Simple sample duplication/dropping can sound ok if you aren't too picky (or say you have a tiny speaker and just need it for sound effects.) ...
  39. I believe that this part (circled in red below)...

    I believe that this part (circled in red below) is the ferrite at the top of the teensy schematic, labelled as 120, which is likely 120 ohms at 50 or 100MHz. You could try just bridging it to see if...
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    I wonder if it's actually necessary to have a...

    I wonder if it's actually necessary to have a separate version of the library.

    Is there something structural about the current audio library that prevents it from having 48k mode that could be...
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    Platformio is working for me with these options...

    Platformio is working for me with these options on macOS:

    teensy_loader_cli -mmcu=imxrt1062 -w -s -v .pio/build/teensy40/firmware.hex

    You sure you have the latest teensy_loader_cli?
  42. Good point, I also didn't see this on Teensy 4.0....

    Good point, I also didn't see this on Teensy 4.0. And if I call flush less frequently (like after every print), it works fine. I suspect that there's some USB timing issue that's at play here.
    ...
  43. Frequent calls to Serial.flush() can gum things up

    I spent a little too long tracking down an issue with Serial.flush() on a Teensy 3.6 today.

    The following sketch doesn't generate any serial output. If I comment out the Serial.flush() it works...
  44. I'm not on the PlatformIO team, but am intrigued...

    I'm not on the PlatformIO team, but am intrigued by the HID-only serial. How does it work?
  45. No problem, Frank! Makes me thirsty too!

    No problem, Frank! Makes me thirsty too!
  46. I'd be interested in seeing these mods for a...

    I'd be interested in seeing these mods for a second virtual serial port. Have you posted them somewhere or made a pull request? (I can't seem to find them...)
  47. You can edit your platformio.ini file and add one...

    You can edit your platformio.ini file and add one of the USB defines there. They are listed here in the platformio documentation:
    ...
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    Gotcha. Poking around here...

    Gotcha. Poking around here https://www.nxp.com/design/microcontrollers-developer-resources/lpc-microcontroller-utilities/lpc-link2:OM13054 I see that the LPC-Link2 can load a Segger J-Link firmware....
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    I meant to ask earlier, have you looked at the...

    I meant to ask earlier, have you looked at the Segger J-Link debug probes? They are quite popular and have inexpensive models and claim to support the MIMXRT1062 here...
  50. Hardware design is up here: ...

    Hardware design is up here: https://github.com/blackketter/briteboard
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