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    And regarding Audio: May I remind you of Paul's...

    And regarding Audio: May I remind you of Paul's statements about enhancing it or incorporating additions to the Teensyduino release?
    I do not collect them around the forum, too cumbersome to find...
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    Not know. I have nothing to do with China, except...

    Not know. I have nothing to do with China, except for some china cups and plates, or the occasional Kong Bao from the takeaway.....

    Arduino is Italian.

    What the Chinese copy is leftovers,...
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    Well, there need to be a real Arduino approach. ...

    Well, there need to be a real Arduino approach.
    That is, reinventing the wheel and making it open source. An Arduino bootloader and programming tool, preferred by using existent options. Could well...
  4. Interesting would be to see scope images of the...

    Interesting would be to see scope images of the signal. Did you populate the capacitors? Maybe the impedance of the chips power supply is too high without them.
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    You could add a few electronic components and...

    You could add a few electronic components and write the EEPROM only after power-down or in case of brown-out.
    That is:
    a second 3.3V regulator for powering peripheral -- the MCU and the EEPROM...
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    Even better than a slow fuse: ...

    Even better than a slow fuse:

    https://circuitdigest.com/sites/default/files/circuitdiagram/Overvoltage-Protection-Circuit-Diagram.png...
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    At least the overvoltage protection is highly...

    At least the overvoltage protection is highly recommended.

    I have here in my hand a USB-C charger. This freakin p-o-s gives fixed 12V basta, completely out-of-specs. It is a very popular power...
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    Forgot: A misbehaving PSU could deliver VBUS...

    Forgot:

    A misbehaving PSU could deliver VBUS well beyond Teensy's input range.
    I'd add a (autoreset) fuse and a voltage clamping diode, just to make sure there will be no higher than 5.5V at the...
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    The DP line is longer than the DN. It may well be...

    The DP line is longer than the DN. It may well be within tolerances as is now, but just to mention, DP/DN are a differential pair.

    Measuring on Rd is a nice diea, but this has to be done really...
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    Are you reverse-engineering a Fairlight? Looking...

    Are you reverse-engineering a Fairlight?
    Looking at the Teensy4.1 schematic I wonder where you can find an 8-bit bus on the Teensy. Pins have been brought out quite randomly, so there is always one...
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    You could use Processing...

    You could use Processing. This can do even more than just GUI and has build targets for everything, including Android. It is easy and similar to Arduino.

    Edit: Processing IDE has problems with...
  12. Yep. Optical encoders on computer-mice do not...

    Yep. Optical encoders on computer-mice do not wear, if built properly. Bearings or the plasic itself are then the weakest parts.
    The CNC encoders are optical, built like a tank, especially useful...
  13. Those CNC pulser handwheel ecoders from China are...

    Those CNC pulser handwheel ecoders from China are optical (!) 100PPR and the 5V version works perfectly on 3.3V as well. The detent can be removed to have a completely smooth flow, with 400...
  14. Soldering is not that difficult. Get a...

    Soldering is not that difficult.
    Get a soldering iron. Even a cheap 10$ one could do that job. Most important is a fine tip and power around 25W.
    A bit of soldering tin, best use Sn60Pb40 with...
  15. I2C could run in the background already, if...

    I2C could run in the background already, if programmed so. One can attach every function onto an interrupt, so it runs "in the background", which could anyway only really happen, if there is a CPU...
  16. Yeah, speed up the MCU, add a resource-eating OS...

    Yeah, speed up the MCU, add a resource-eating OS and make yet another new Pi.

    The USP of Teensy is it's bare metal simplicity at maximum usable power. Once an OS is in, there are others already...
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    There are many huge PSRAM chips on the market,...

    There are many huge PSRAM chips on the market, the problem is, the larger ones are all xSPI (8 lanes or more) and not compatible with the QSPI (4 lanes) implementation on Teensy 4.1., so a simple...
  18. What about the crystal? It's oscillation is due...

    What about the crystal? It's oscillation is due to electrostriction, kind of mechanical, so what about defects due to to a spot of impurity, or after the impact of a particle (radiation) or...
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    You could power the digital section DVcc from...

    You could power the digital section DVcc from Teensy's 3.3V. And Vdd, Vss and Vref according specs. The level shifting happens internally. So 3.6V on DVcc is not needed.
    Powering DVcc higher than...
  20. Channel crosstalk. This is due to the low...

    Channel crosstalk.
    This is due to the low quality of the SGTL5000 and the board layout pushed it even lower.
    If you really need pro audio, use something else.
    Almost every CODEC is better than...
  21. Flash memory will lose integrity over years....

    Flash memory will lose integrity over years. Guaranteed are 10 to 20 years usually, but nobody can actually tell. A solution could be a refreshing rewrite after a few years, but this contributes to...
  22. Look in the datasheet of the SGTL5000...

    Look in the datasheet of the SGTL5000, figure 20 on page 60.
    You may use high quality audio capacitors ( C2 and C3 ) in the audio lines, so the headphone is referenced to GND or wherever you like....
  23. I had one 3.2 with the same feature-...

    I had one 3.2 with the same feature- unfortunately already gutted. Obviously bad PCB. Anyway, it is not good practice to route a signal 1 or 2 layers under a cutting jumper, as nowadays insulation...
  24. The piezo thing would work. Just be aware the...

    The piezo thing would work. Just be aware the piezos can produce an infinte voltage (from the MCU point of view), so it is important to have suppressor diodes with the voltage corresponding to the...
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    Well, it is less an issue of commercialisation,...

    Well, it is less an issue of commercialisation, but more an issue of hobbyist assembly and distributor availability of parts.
    The FBGA is not easy to solder to a a board, as is with the USB-C...
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    Hmm. what exactly do you want to achieve by...

    Hmm. what exactly do you want to achieve by "sniffing" USB-PD?
    The protocol is very well documented.

    Making some non-standard communication by deliberately forging an impropriate signal and...
  27. Ah, sorry. Thank you for pointing that out.

    Ah, sorry. Thank you for pointing that out.
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    Well, your answer is not the end of the world,...

    Well, your answer is not the end of the world, because we are still able to use OpenAudio_ArduinoLibrary as an add-on to or as a replacement of Teensy Audio. It just would have been nicer to have it...
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    Yes, the last post was 09-02-2020, 03:03 AM ...

    Yes, the last post was 09-02-2020, 03:03 AM

    And there it ends, because it is not that simple.

    Adding a dedicated chip is simple.
    And it just works.

    F32 OpenAudio_ArduinoLibrary by Chip...
  30. Could it be your MIDI source (I guess it is a...

    Could it be your MIDI source (I guess it is a keyboard), plays it's own note as well as the incoming note? If you want to get rid of the played note and sound only the transposed note, the keyboard...
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    Could it be the MLX has been set to PWM output? ...

    Could it be the MLX has been set to PWM output?

    Is the MLX programmed to 0x5A? Try to leave out the address to use the default with the Adafruit example on SCL0/SDA0 and alone without displays to...
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    Good luck with rewriting the whole USB code. :)

    Good luck with rewriting the whole USB code. :)
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    @jonr call me stupid. I did never get audio over...

    @jonr call me stupid. I did never get audio over USB to work reliably. And it is 16 bit 44100k only. But hey, people have seen a horse vomit in front of the pharmacy....



    Ok. The existing...
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    Thank you for the comment. As written, the power...

    Thank you for the comment.
    As written, the power feature is on board already, so it can distribute power from USB-C to USB-C and also power the other two USB3 ports as well, as provide power from an...
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    USB Audio for Teensy

    The metioned I2S bridge:

    As the USB-Audio is more or less of a hassle, I decided to make an I2S-USB bridge board.
    This has quite some features, most important:

    Adaptive sample rate as I2S...
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    USB-C for Teensy

    What do you think about the following add-on board for Teensy:

    2 USB-C with full feature, so can be connected in daisy-chain for every feature, including, power, Thunderbolt, HDMI, etc.
    2 USB3.0...
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    Anyway, it would be super nice to have...

    Anyway, it would be super nice to have hackability.
    This also contributes to sustainability.
    Be it hobbyist-code, the quality may still be excellent, because a hobbyist usually loves what she or he...
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    Yes, I totally agree.The Teensy community is the...

    Yes, I totally agree.The Teensy community is the best part of it all.
    But at the end, when it comes to getting to a roll-out, it is a matter of turning investments (in time and money) into reward...
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    MCUXpresso is the way to go. With this and the...

    MCUXpresso is the way to go.
    With this and the i.MX RT 1064 EVK you get a nice platform and have the complete open field of possibilities with the MCU used in T 4.x.
    Absolutely not Arduino.
    And...
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    Apple users can still use one of the existent...

    Apple users can still use one of the existent Windows or Linux VM solutions.
    You can not burden a similar requirement onto people using a functional OS!
    This completely arrogant Apple-tude needs to...
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    If the power supply to the TS100 is grounded,...

    If the power supply to the TS100 is grounded, then the TS100 is as well. The tip itself is floating, so there should be no conductive path, except for the capacity to the heater (about 100nF). The...
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    A way to make this work could be to create...

    A way to make this work could be to create multiple portable installations of Arduino/Teensyduino, one for each type of board.

    https://www.arduino.cc/en/Guide/PortableIDE

    While I did a lot of...
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    Very, that means VERY, interested in getting boot...

    Very, that means VERY, interested in getting boot chips for virgin iMXRT, too.
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    What is that? Always that Apple Extra! Catalina...

    What is that? Always that Apple Extra! Catalina solved, Big Sur on. Would it be rude to drop Mac support altogether to keep the development going? There need to be many and strong signals towards...
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    Teensy is sensitive to shortcuts on conductive...

    Teensy is sensitive to shortcuts on conductive surfaces, ESD pad, metallic workbench, .... a bare board needs to sit on a non-conductive surface, especially with pins soldered.

    Teensy are...
  46. The resistor dividers could be done all the same,...

    The resistor dividers could be done all the same, actually it would make voltage reading and calculation much simpler. You would just lose one bit of precision at the lower voltage end of the battery...
  47. A 12V voice activated corridor switch relay could...

    A 12V voice activated corridor switch relay could be a simple and easy solution for this.
    It has an adjustable timer and a microphone input that you could just connect to an audio out, either by...
  48. If the preamp has no power switch, you might...

    If the preamp has no power switch, you might connect it to the slave side as well and use the TV or whatever signal source on the master side. The master-slave sockets usually have a potentiometer to...
  49. Is it coaxial S/PDIF or optical? Is the setup...

    Is it coaxial S/PDIF or optical?
    Is the setup automotive 12V or mains powered?

    Actually you would not need a Teensy or any other microcontroller for this task. If signal is present, the 12V...
  50. Hmm... Could it be possible, a flashable binary...

    Hmm... Could it be possible, a flashable binary has not a proof re-relation to the originating source code, that is, nobody can prove that a binary is made from a specific source or maybe another one...
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