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    By not accurate, I mean that the PCB has markings...

    By not accurate, I mean that the PCB has markings for the 3.6 (i.e. ground, ground, D+, D-, 5v). It does not have markings for the 3.5 (i.e. you just have to know that the 2 pins are A25 and A26,...
  2. See this thread: ...

    See this thread:

    https://forum.pjrc.com/threads/58028-Pins-to-bring-out-on-a-hypothetical-larger-Teensy4


    There are two main boards being discussed. One is a board that uses a processor in...
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    With the Teensy with the USB adapter pointing to...

    With the Teensy with the USB adapter pointing to the left, on the bottom 5 inner pins (between the outer pins 1-7):

    On the Teensy 3.6, these 5 pins are for the USB host support (a second USB where...
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    Off hand, I didn't notice any larger ILI9341...

    Off hand, I didn't notice any larger ILI9341 240x320 displays at Amazon.com. There is a 3.2" display, but that likely is not a big enough jump.

    There are various ways to get a bigger screen, but...
  5. I thought I had done a post, but it turns out...

    I thought I had done a post, but it turns out that was for the Audio board for the 3.x series. Here is the information for the 4.0:

    The following pins are common pins, used by both the audio...
  6. Don't assume random parts from your parts bin will work

    I was messing around, and I had some DFPlayer Minis lying around. These are rather simple MP3 players that play MP3 files from a micro SD card. You can control it via a serial line or via simple...
  7. Or alternatively, use NiMH AA rechargeable...

    Or alternatively, use NiMH AA rechargeable batteries. These batteries have a nominal voltage of 1.2 volts (4.8 volts for 4). I believe freshly charged they might be 1.38 volts (5.52 volts for 4). ...
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    As I understand it, S/PDIF support is not in the...

    As I understand it, S/PDIF support is not in the current 1.48 for Teensy 4 (it is in Teensy 3.x).

    Note, when posting code, please put it inside the CODE and /CODE tags. Use the '#' on the tool...
  9. Yes, pin 13 is not an analog pin.

    Yes, pin 13 is not an analog pin.
  10. There is this post that mentions some things to...

    There is this post that mentions some things to improve SPI devices:

    https://www.pjrc.com/better-spi-bus-design-in-3-steps/
  11. It probably would be helpful to post a picture...

    It probably would be helpful to post a picture showing exactly how you have things wired up.
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    Unfortunately, Paul has said that was a design...

    Unfortunately, Paul has said that was a design choice due to wanting to run at USB 2.0/HI speed (480 Mbps) instead of USB 1.2/Full speed (12 Mbps) that the previous Teensys ran at. Evidently there...
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    I must admit that as we've had multiple threads...

    I must admit that as we've had multiple threads about various castlelated pins and board extensions, it would be nice if there was an easier method for getting to the underneath pads with breakout...
  14. Cool thanks. My previous set came back from OSH...

    Cool thanks. My previous set came back from OSH park and the castlelated part for pins24-33 was not cut out. There were normal holes there, so I figured I could just put chunk of solder in the hole...
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    Some general notes. Yes, eventually you are...

    Some general notes.

    Yes, eventually you are going to possibly want 70 buttons, but you are going to want to start small rather than trying to add code to add all 70 buttons at once. And you will...
  16. Note if you are using I2S output on the Teensy...

    Note if you are using I2S output on the Teensy 3.2, 3.5, or 3.6, two of the I2S pins are the default SPI0 pins, so you would need to use the alternate pins for these. Look at the audio shield...
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    I am a software guy, so this is more of a guess...

    I am a software guy, so this is more of a guess than anything else. I suspect that you probably want to have a battery in between the raw hydro power and the Teensy. The hydro power would recharge...
  18. No problem. just having 1 or 2 holes on the left...

    No problem. just having 1 or 2 holes on the left side would probably help.
  19. Just to be clear: The following pins are...

    Just to be clear:

    The following pins are common pins, used by both the audio board and available for other uses:

    Vin (I'm not sure if the audio shield uses this or not)
    Analog Ground (used...
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    The on/off switch is not really a reset switch. ...

    The on/off switch is not really a reset switch. A real reset switch will instantly restart the processor once you connect it to ground.

    On the Teensy 4.0, if you connect the on/off pin to ground...
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    Other than designing a board to connect this...

    Other than designing a board to connect this board to the Teensy (and of course ultimately soldering stuff and a micro SD card), you don't need any additional components. The board has all of the...
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    I'm not sure what you meant by the relocation of...

    I'm not sure what you meant by the relocation of RX2, but given the PT8211 board uses I2S, there are several pins that need to be relocated with jumper wires. I posted a list some time ago, but I...
  23. @FRDM4236 I'm finally getting around to soldering...

    @FRDM4236 I'm finally getting around to soldering the board you sent me, and I'm also looking at the V3 board currently being produced at OSH park (+ purple Teensy 4.0) that I ordered on October...
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    Teensy to HDMI output

    In going through my mail (from the gamedunio3 developer looking at doing HDMI output), and following some google links, I noticed there is an Arduino -> HDMI board out there, that has an optional...
  25. We probably need to come up with an alternate...

    We probably need to come up with an alternate name for PROGMEM for functions, and get it into 1.49, and change all the function declarations in the current source to use this new name.

    Given how...
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    An alternative spreadsheet is my spreadsheet...

    An alternative spreadsheet is my spreadsheet where I attempt to keep track of the Teensy LC, 3.0, 3.1, 3.2, 3.5, 3.6, and 4.0 pin assignments:

    ...
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    Well, Adafruit finally has the audio shield for...

    Well, Adafruit finally has the audio shield for Teensy 4.0 available as a separate part number from the version for 3.x.

    Sparkfun has not yet changed their web page to indicate the audio shield...
  28. In terms of your connections, there are several...

    In terms of your connections, there are several things that need to be changed:

    1) You connected VIN to the power terminal -- on the Teensy, except when you are powering external devices that need...
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    Would it be possible to have pin #'s on the...

    Would it be possible to have pin #'s on the bottom silk screen? At least for the pins > 23? I really don't want to have to refer to an online site when I'm bringing out pins.
  30. Originally i2c_t3 was the only way to do multiple...

    Originally i2c_t3 was the only way to do multiple I2C buses, but Paul did add support in Wire.h some time ago for multiple I2C buses.

    It is unfortunate that there is currently no Teensy 4 version...
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    Gamedunio3 and Gamedunio3x are other options that...

    Gamedunio3 and Gamedunio3x are other options that have the separate microprocessor on the display, and you communicate over SPI (nextion uses a serial port)

    ...
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    Well there is this document from TI: ...

    Well there is this document from TI:

    http://www.ti.com.cn/cn/lit/an/slva689/slva689.pdf
  33. Note if you use a normal sketch and not uncanny...

    Note if you use a normal sketch and not uncanny eyes (i.e. one that a proper SPI.beginTransaction and SPI.endTransaction, have devices that can share the SPI bus, not try to optimize to use an async....
  34. Well there is always uncanny eyes. This...

    Well there is always uncanny eyes.

    This originally was an Adafruit sketch for the Teensy 3.2 using the 128x128 TFT/OLED displays. The author (Phil Burgess / Paint Your Dragon) used advanced...
  35. I suspect the reason is on the Teensy...

    I suspect the reason is on the Teensy 3.2/3.5/3.6, the two grounds are different. The ground next to pin 0 is the digital ground. The ground between VIN and 3.3v is the analog ground. The Teensy...
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    Ok, thanks.

    Ok, thanks.
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    I2S for input and output

    I don't know the I2S protocol all that well.

    If I wanted to have an I2S input (such as the I2S microphone sold by Adafruit) and an I2S output (such as audio shield or the various I2S devices that...
  38. Note, you have to understand the Teensy 4.0 is...

    Note, you have to understand the Teensy 4.0 is different in terms of pin layout than the Teensy 3.2. That's why there is the revision D of the audio shield that only works with the Teensy 4.0 (and...
  39. I don't yet have any comments on the new stuff,...

    I don't yet have any comments on the new stuff, but I will note that traditional pin 12 is mislabeled as pin 10.

    I assume that at least pins 24-33 will be the same as the underneath pins on the T4...
  40. There are various things that come to mind. ...

    There are various things that come to mind.

    Most obvious is you may have slight solder bridges or cracks that only show up occasionally. When you switch wires, you move the board slightly, and...
  41. Or use the other 2 SPI buses. To use SPI1, you...

    Or use the other 2 SPI buses.

    To use SPI1, you need to connect pads for pins #26-27 from underneath the Teensy 4.0 (and use pins 0/1, which means you can't use Serial1). Note, the pinout card...
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    If you are going to control the CS42448 via I2C,...

    If you are going to control the CS42448 via I2C, you might need somewhere on the I2C bus pull-up resistors between each of the two pins (18, 19) and 3.3v. Typically for Teensy, you would use 2.2K...
  43. One thought that I've had is instead of a SD...

    One thought that I've had is instead of a SD card, make the extra space beyond the current Teensy 4 have through hole pins, grouped logically, grouping the pins either into 10 rows of 7 columns each,...
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    As I said earlier, I tend to like what I called a...

    As I said earlier, I tend to like what I called a hacker's shield that has islands with pins needed for a particular purpose (I2S1, I2S2, Serial1, Serial2, i2C0, i2C1, SPI0, SPI1, etc.). And it...
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    [QUOTE=Andy Belov;218961]Wow, that's advanced. I...

    I would have hoped even the Teensy 3.x and similar ARM M4 Adafruit/Arduino/Sparkfun boards would have already exposed a lot of these slow devices that were only made for AVR 328p (i.e. Arduino Uno)...
  46. Well if size is the primary issue, bear in mind...

    Well if size is the primary issue, bear in mind the Teensy 4.0 is the same size as the 3.2, though you would need to solder two wires to get the D-/D+ pads underneath the Teensy. If you have already...
  47. In preparation for getting my board today, I...

    In preparation for getting my board today, I looked at the pin assignments of the board. I noticed that where the 2 DAT pins (A22/A21) are in the 3.5/3.6 are not used. If you ever decide to respin...
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    This is one of the areas where there is no one...

    This is one of the areas where there is no one answer.


    Some people need as much read/write RAM as possible to run their sketches, but they don't need to use the RAM to write to high speed...
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    It is one of those chicken and egg scenarios. If...

    It is one of those chicken and egg scenarios. If you don't have the hardware, you likely won't get the software. If you have the hardware, depending on people's motivations, you may or may not get...
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    Please don't post duplicate threads. I answered...

    Please don't post duplicate threads. I answered your question over in the first post I saw (in the audio sub-forum).
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