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  1. Replies
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    Hi Paul! I am curious if this ever got snuck...

    Hi Paul!

    I am curious if this ever got snuck in to the newer bootloader ICs? I designed a board way back when with this debug connector, and now im running into some problems that would be really...
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    Paul, I have another idea to increase bit...

    Paul,

    I have another idea to increase bit depth of the dacs, using Teensy hardware.

    Take a few PWM pins, put them through RC circuits to get constant DC voltage. These would be static...
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    Never mind on this. the more I look into it, the...

    Never mind on this. the more I look into it, the more it seems like a fruitless endeavor...
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    13637 then again, I see this diagram, and it...

    13637

    then again, I see this diagram, and it appears that the dac has another output, besides into the comparator. Can I get to it somehow? I wonder!
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    I may have answered my own question from the K64...

    I may have answered my own question from the K64 manual, which states:



    Still, I'd like to hear any suggestions. Perhaps I could use the comparator to a static reference?
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    6-bit dac in comparator on K64 and k66

    Does anyone know how to access the 3 6-bit DACs that are part of the 4 Analog comparators on the K66 and K64?

    I was thinking of trying to add voltages from two 6 bit dac and two of the 12 bit...
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    Does this allow for dynamic allocation of...

    Does this allow for dynamic allocation of audioconnection objects with memory reclamation?!
  8. I was able to implement this after also...

    I was able to implement this after also implementing some additional code in teensy3/usb_midi.h and teensy3/usb_midi.c

    I have forked the cores github and submitted a pull request to get this added...
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    This is the schematic:...

    This is the schematic: https://www.pjrc.com/teensy/schematic.html

    What you want is the PCB layout. I don't think Paul usually gives these out. If you are making a new project, its generally a good...
  10. So I found a device which does a form of...

    So I found a device which does a form of varispeed / playing a WAV back at a different sample rate. The Radio Music module. It doesn't appear to use the teensy audio lib, but I am wondering if the...
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    Hey Duff, Just came across your pitch shift...

    Hey Duff, Just came across your pitch shift project. I haven't had a chance to sit down and take it apart yet. Looks super interesting!

    You mentioned before that the thing you got working was not...
  12. TelephoneBill - Thank you for the explanation! I...

    TelephoneBill - Thank you for the explanation! I was never schooled in electrical engineering, so it is always nice when someone can explain the theory behind what is going on. These optocouplers...
  13. Base Emitter Resistor for 6N139 on MIDI input?

    So I have an interesting situation I would like to share. I created a MIDI input circuit that mostly follows the MIDI schematic detailed by Paul on the midi library page. I originally used this 6N139...
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    Preliminary testing seems to point towards code...

    Preliminary testing seems to point towards code compatibility between the W25Q128FV and the new W25Q128JV. I am curious if the faster SPI speed (133mhz) will provide faster transfer speeds
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    W25q128fvsig eol

    Looks like the W25Q128FV is being EOL'd

    The replacement seems to be W25Q128JVSIQ
    https://www.digikey.com/product-detail/en/winbond-electronics/W25Q128JVSIQ/W25Q128JVSIQ-ND/5803943

    datasheet:...
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    I was experiencing the problem, and I can...

    I was experiencing the problem, and I can demonstrate what it looks like from terminal below:



    I could not find evidence of any application using the usbmodem401231 using sudo lsof | grep...
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    ooh im gonna have to try this one out. I am...

    ooh im gonna have to try this one out. I am getting bouncing problems with an Alps encoder and the Encoder library.
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    I am curious if you ever got beat tracking...

    I am curious if you ever got beat tracking working, Paul?
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    Hey poltergeist, did you ever find a pitch...

    Hey poltergeist, did you ever find a pitch shifting algorithm that worked better for this project?
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    hey @hyperdyne, would love to see your pitch...

    hey @hyperdyne, would love to see your pitch shifting code added to the teensy audio lib :D
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    I think that this is what is happening, but its...

    I think that this is what is happening, but its not another program. Its like the handle crashed and is stuck, and wont release, so each time you connect, it keeps them open and has to increment the...
  22. Neopixels (WS2812 or SK6812), interrupts and IntervalTimer

    Just thought I would share a fun little hack I discovered.

    Neopixels (WS2812b and SK6812) LEDs use a single data pin that require a fixed update frequency. Because of this, the update routines in...
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    I have had this happen a number of times. It is...

    I have had this happen a number of times. It is insanely frustrating. Rebooting did not fix it for me, I honestly can't remember how it was resolved.
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    @xxxajk, It wasn't me who had code. I was the one...

    @xxxajk, It wasn't me who had code. I was the one who had MIDI hardware ready to be tested.

    Is ADK what we need to get MIDI Host Mode working?
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    New OctoSK6812 Library on Github

    Hello!

    I have incorporated changes for using SK6812 RGBW LEDs with updated OctoWS2811 for usage with Teensy-LC and 3.5/3.6.

    Original changes made by Mackenzie Hauck:...
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    I am also curious if anyone worked on any tools...

    I am also curious if anyone worked on any tools to take advantage of C_DEBUGEN
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    Hey xxxajk , I am curious if you ever got MIDI...

    Hey xxxajk , I am curious if you ever got MIDI Host mode working at all? I Have hardware that I would love to test!
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    I just got some boards made with PCB universe,...

    I just got some boards made with PCB universe, and I am quite happy with the quality! And quite cheap as well (if you are doing a run of at least 10) Although for one board, I needed no solder mask...
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    SerialFlash Print interface

    Hello,

    I am trying to use the ArduinoJson library with SerialFlash. I am curious if anyone has implemented a Print interface to SerialFlash files, as is implemented for the SdFat object.

    A bit...
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    Hi xxxajk, I know you have been busy lately,...

    Hi xxxajk,

    I know you have been busy lately, but I have gotten my hardware to work properly! (I think). I have a board that has the ID pin implemented, with the schematic I had posted previously....
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    Is there any problem with having the 100 uF...

    Is there any problem with having the 100 uF capacitor present when the device needs to be in device mode? I guess the danger there would be reverse and sucking too much current from the host and...
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    Ah, never mind I found your post where you...

    Ah, never mind I found your post where you mention it is the http://www.ti.com/product/tpd3s014.

    https://forum.pjrc.com/threads/34808-K66-Beta-Test?p=110952&viewfull=1#post110952
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    For my device, the only reason I would need to...

    For my device, the only reason I would need to power it via USB is when I am writing code and doing some local tests on it. It is a Eurorack Synth module, so in its natural state, it is connected to...
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    7946 Here is the schematic I am using for the...

    7946

    Here is the schematic I am using for the OTG power switch. Any thoughts? I figure this will still allow me to power the teensy since the VUSB has the diode path back to my 3v3 LDO.

    I am...
  35. Replies
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    I found this Maxim brief on OTG mode:...

    I found this Maxim brief on OTG mode: http://pdfserv.maximintegrated.com/en/an/AN1822.pdf
  36. Replies
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    yea, I can have the ID pin implemented. You are...

    yea, I can have the ID pin implemented. You are talking about pin 4 on the microUSB connector yes? 7941

    When you said implement a USB switch that changes the power on the VBUS line, do you mean...
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    If I could get it to work, of course I would, but...

    If I could get it to work, of course I would, but I am not quite sure where to start on that one. If you gave me a bit of guidance on where to start poking, or what papers to read I might be able to...
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    I have a product I would like to use this in. For...

    I have a product I would like to use this in. For hobbyist stuff I would agree with you, but I don't have the space for an additional teensy in this device :D

    Having to re-code the device would...
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    It might be possible! But you won't be able to...

    It might be possible! But you won't be able to get good advice without more information.

    If it were possible, I wonder if you would get line noise*on your audio signal without having a separate...
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    are you measuring it with a multimeter? The...

    are you measuring it with a multimeter?

    The Teensy needs 5v DC voltage to power its 3v3 LDO. If you have access to an oscilloscope, it would be good to measure it to see the waveform.

    If you...
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    Ah that makes total sense. I need to dive into...

    Ah that makes total sense. I need to dive into those audio headers and get to know em a bit better.
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    Curious Audio Library Behavior

    so this is not quite a problem, but more of a curiosity...
    when I run the code below, it works fine, and will print out what frequency is being analyzed.

    The curiosity is when I delete the...
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    Hi Sumotoy, I can help you test the SSD1351...

    Hi Sumotoy,

    I can help you test the SSD1351 doesn't work on 96Mhz.

    I haven't been able to get it to work at 96Mhz with any libraries yet...

    I will open a bug on github to track the issue....
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    Ah yes! I can test it! I only have the Keith...

    Ah yes! I can test it!

    I only have the Keith McMillen QuNexus keyboard, but I am most interested in USB sync with Elektron gear (drum machines etc..).

    I can and will hunt down other MIDI gear...
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    Hello! I wanted to chime in here, it seems its...

    Hello!

    I wanted to chime in here, it seems its been a while since this topic has been brought up.

    I for one, would love to see USB MIDI host capabilities - in order to connect a USB MIDI...
  46. ikravets - I am running into an issue where I...

    ikravets -

    I am running into an issue where I have a sketch that works just fine in the regular arduino environment, but does not work when compiled and uploaded in the PlatformIO environment. I...
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    I can get this to work fine now with regular...

    I can get this to work fine now with regular arduino and T1.29. I usually use Platform IO and I think there is something funky going on there!
  48. ah, awesome! I will manually do it for now. PIO...

    ah, awesome! I will manually do it for now. PIO 3.0 looks great, but I am a bit weary of an alpha release with critical projects in the pipe!

    Thanks! ikravets!
  49. Is there a way to install a specific version of...

    Is there a way to install a specific version of the teensy framework with platform IO? 1.29 is the current version, but platform is still on 1.28. Is there a way to revert to a previous version?...
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    What frequency are you running at? I think I...

    What frequency are you running at?

    I think I must have something funky going on in my installation. I will have to re-install everything tomorrow and see where we are at.

    Good news is that in...
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