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  1. Also check which version of Teensyduino you have....

    Also check which version of Teensyduino you have. Click Help > About in Arduino.

    A problem with startup on 3.6 with slow rising power supplies was recently fixed. If you have an older version of...
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    Yes, the SD pads moved and changed to 1 mm...

    Yes, the SD pads moved and changed to 1 mm spacing.

    Rather than pogo pins, the intended connection method is to solder a HFW8R-1STE1LF (or similar FFC connector) onto the T4 and your breakout...
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    Yes, in msg #3...

    Yes, in msg #3.

    We're not sharing any photos yet (and probably will not until July), but when you get the beta hardware I'm sure it'll make sense.
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    Laser cutting is pretty easy, at least for...

    Laser cutting is pretty easy, at least for acrylic.

    Really Robin deserves much of the credit. She does so much behind the scenes that nobody ever sees, which really maximizes the time I can spend...
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    Are you asking about the 3-4 layers & 2 screws of...

    Are you asking about the 3-4 layers & 2 screws of white plastic which hold the 8 tiny pogo pins in place? I did laser cut those plastic parts.
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    Digikey HR1941CT-ND

    Digikey HR1941CT-ND
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    Are you using the breakout board with 8 tiny pogo...

    Are you using the breakout board with 8 tiny pogo pins? Maybe try re-seating the T4. Run the test program from msg #2443 and use multimeter in frequency count mode, or another Teensy running...
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    Several years ago, back when Teensy 3.0 was the...

    Several years ago, back when Teensy 3.0 was the newest model, I published some benchmarks for sending large amounts of data from a PC to Teensy. While it was motivated by the many people wishing to...
  9. I tested just now with a genuine Teensy++ 2.0 and...

    I tested just now with a genuine Teensy++ 2.0 and Arduino 1.8.9 with Teensyduino 1.47-beta2 running on Linux x86 64 bit. I connected a Fluke 87 multimeter between PF7 and GND.

    When I ran the used...
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    I've added brendanmatkin, crees, ETMoody3, rcarr,...

    I've added brendanmatkin, crees, ETMoody3, rcarr, wwatson, and XFer to the list of approved beta testers. :)

    As always, to get hardware sooner, email Robin directly with the magic words "I have...
  11. Wow, 4 feet is a really long run for a high speed...

    Wow, 4 feet is a really long run for a high speed protocol like SPI.

    Sometimes adding resistors in series, located close to the Teensy pins, can help the signals travel more cleanly down the long...
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    So, are you saying you wish to buy nothing from...

    So, are you saying you wish to buy nothing from PJRC?
  13. Maybe try int32_t (which is always the same)...

    Maybe try int32_t (which is always the same) instead of int (which is different on Uno vs Teensy 3.2).
  14. Very strange. Could you double check the update...

    Very strange. Could you double check the update really worked? In Arduino, click Help > About (or Arduino > About if using a Mac). It will show the version of Arduino and Teensyduino.

    After...
  15. Any chance you could show us photos of how you're...

    Any chance you could show us photos of how you're testing, with clear shots of the Teensy++ 2.0 hardware and all wires?

    Hoping to clear up 2 things:

    1: Sometimes we see misunderstandings about...
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    Does it play with the 4 sample WAV files?

    Does it play with the 4 sample WAV files?
  17. The USB transceiver is connected to VREG_OUT. It...

    The USB transceiver is connected to VREG_OUT. It needs 3.3V applied even when the on-chip regulator isn't used.

    The chip uses a PLL and programmable dividers to generate the clocks. It's very...
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    You can just omit that resistor. It's not...

    You can just omit that resistor. It's not needed.

    I had planned to use it for testing without having the 120 ohm resistor or any connection to a CAN network. But I ran out of time and sent all...
  19. This is a rather difficult hack to attempt to the...

    This is a rather difficult hack to attempt to the SD library, even for experts. You really should use SPI and abandon attempting to use SPI1 or SPI2.

    Or you can use the built in SD socket on...
  20. 10K are in the kit. ...

    10K are in the kit.

    https://www.pjrc.com/store/audio_tutorial_diy_parts.html

    Values from 1K to 25K works fine. Normal "linear taper" are best (not audio taper).
  21. Does the current sensor have a resistor built in?...

    Does the current sensor have a resistor built in? Some of those current transformers output a pure current and require a resistor to convert to a voltage which can be measured by Teensy. Without...
  22. Usually a pair of the 14 pin sockets and a pair...

    Usually a pair of the 14 pin sockets and a pair of 14 pin headers are needed (sold separately), to join it to the Teensy.

    It comes with a headphone jack, so you can just plug headphones in.
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    Nope, the 15 sec restore is exactly the same...

    Nope, the 15 sec restore is exactly the same (likely to be unreliable) as the first beta #2 and beta #1 boards.

    In other news, yesterday the (hopefully final) bare PCB protos with the brown-out...
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    Agreed, this does seem unlikely. Maybe there's...

    Agreed, this does seem unlikely.

    Maybe there's some sort of misunderstanding about how to connect the hardware? Can you show us photos of what you're really doing? Maybe we'll be able to spot...
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    Hard to say without seeing the details, like what...

    Hard to say without seeing the details, like what you're doing to transmit.

    Since you're using ASCII text, maybe try sending from the Arduino Serial Monitor. Then you can print extra info to help...
  26. Yes, it can be changed by editing the I2S code. ...

    Yes, it can be changed by editing the I2S code. It's been discussed before. Maybe you can find some of those old threads by search?

    For transmitting signals farther, the key to success involves...
  27. Maybe the ResponsiveAnalogRead library can help...

    Maybe the ResponsiveAnalogRead library can help you get a cleaner measurement of the photosensor signal?

    Might also be worth trying a 10 nF capacitor connected as close as reasonably possible...
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    It can handle up to -300 mV. Any farther than...

    It can handle up to -300 mV.

    Any farther than -0.3V risks damage. That includes behavior during startup and shutdown, so it's wise to check what your opamp actually does when power comes up and...
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    This is indeed a strange problem. The watchdog...

    This is indeed a strange problem. The watchdog somehow getting into windowed mode does seem like the only plausible explanation, but I can't see how that could be happening.

    I am currently at...
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    Any chance you could try a program which...

    Any chance you could try a program which automatically sweeps the PWM gradually, without requiring communication from your computer?

    While you did give us a complete program, it appears to depend...
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    Yes, exactly, just replace every "Wire" with...

    Yes, exactly, just replace every "Wire" with "Wire1".

    But if you're using a library which as "Wire" written deep inside its code, you would need to replace every "Wire" with "Wire1" inside that...
  32. Your sample code says this: *bpR++ =...

    Your sample code says this:


    *bpR++ = playbufR[i];// <--gets stuck here

    But "playbufR" isn't even one of the variables defined anywhere in the sample code. How can you expect anyone to...
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    Yes, it's on the bottom side, same location as...

    Yes, it's on the bottom side, same location as Teensy 3.2, 3.5, & 3.6.

    All the beta #2 boards were made without these pads joined. If you look into the breakout board from the side, you'll...
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    I've got 2 more beta #2 boards with brown-out...

    I've got 2 more beta #2 boards with brown-out restart mod, and 1 more bare breakout board + parts. Does anyone (on the beta testers list) want to do any testing with these? Email Robin directly, as...
  35. How can anyone answer, when we don't even know...

    How can anyone answer, when we don't even know which Teensy you're using, nor anything about this program other than it used interrupts (which have been used successfully by many thousands of other...
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    Please send this directly to Robin by email. She...

    Please send this directly to Robin by email. She does the shipping.




    I soldered the SMT parts to 4 more of the breakout boards. For the first 4 of these beta 2+mod boards, I'll send those...
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    I have 5 of the beta #2 boards with the brown-out...

    I have 5 of the beta #2 boards with the brown-out restart mod. Who has hit the brown-out lockup problem and wants one for testing?



    I do have 8 more of the breakout boards, but none are...
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    Nope, this was only ever at the initial planning...

    Nope, this was only ever at the initial planning stage.

    Ask me again in a couple months. Right now, all dev cycles are going into Teensy 4.0.
  39. Theremingenieur answered your first question...

    Theremingenieur answered your first question quite well. I'll try to get the 2nd part...




    Normally you would use an "audio taper" pot to attenuate the DAC's signal, and an opamp as a buffer...
  40. Can you try running the benchmark program on an...

    Can you try running the benchmark program on an Adafruit board?

    https://github.com/PaulStoffregen/USB-Serial-Print-Speed-Test/blob/master/usb_serial_print_speed.ino

    What speed do you get?
  41. What is this part? 16612 In the past, we've...

    What is this part?

    16612

    In the past, we've seen trouble caused by certain step-down power supplies, especially Traco. Many of them require extra capacitors at their input and output. The...
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    No, probably not fast enough. The only...

    No, probably not fast enough.




    The only way to really know the answer is to compile the code, then look at the assembly listing, and check how many cycles each instruction really takes.

    In...
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    Maybe look at File > Examples > Audio > Synthesis...

    Maybe look at File > Examples > Audio > Synthesis > Guitar. It plays chords.

    If that doesn't answer your question (it probably won't), maybe explain in more detail and give us some context to...
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    When you read the reference manual, and when we...

    When you read the reference manual, and when we talk of partitioning, don't confuse divvying the low-endurance flash between FlexNVM wear leveling and direct access with another unrelated FlexNVM...
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    The simple answer, which I tried to say in msg...

    The simple answer, which I tried to say in msg #2, is "4096 is already the maximum".

    But to muddy the waters here with a much more complex answer, indeed the data flash area is 128K. The wear...
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    That's a very unusual and very fast interface for...

    That's a very unusual and very fast interface for a musical instrument.

    If it really is sending 4 bits (so 5 signals, CLK and D0 to D3...) every microsecond, you're probably going to need a much...
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    Here's some at Digikey. You'll need to cut away...

    Here's some at Digikey. You'll need to cut away one of the pins before soldering.

    https://www.digikey.com/product-detail/en/metz-connect-usa-inc/PR20205VBDN/1849-1002-ND
    ...
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    Generally no, they're not sold that way, at least...

    Generally no, they're not sold that way, at least not for Teensy.
  49. Usually the best info comes from installing the...

    Usually the best info comes from installing the library, then clicking File > Examples > [LibName] to open one or more of its examples. Almost all libs come with examples to demonstrate how to use...
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    The defines in core_pins.h are probably the...

    The defines in core_pins.h are probably the closest thing.

    https://github.com/PaulStoffregen/cores/blob/master/teensy3/core_pins.h
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