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  • TheHermit's Avatar
    Today, 01:15 AM
    I just tested your sketch on my laser projector and it worked fine with no modifications (except to reduce the amplitude to .8) on my Arduino installation. So the problem isn't within your sketch. Since the DIN signal...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    Yesterday, 11:43 PM
    Bummer. That's very puzzling and disappointing to hear. Thank you for reporting back to let us know. Perhaps the libraries are stored elsewhere in Ubuntu? Try searching your libraries from inside the Arduino's IDE,...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    Yesterday, 05:20 PM
    Yes, that sounds like the same issue I had. I suspect that you're also seeing a warning, whenever you compile, saying that there are multiple library files named 'Audio.h'. I believe that's because one from Adafruit is...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    05-26-2022, 12:00 AM
    Hi Dmax, Was just laying out a differential amp board for the model II of the Teensy Laser Synth module. Circled back to have a closer look at yours. I'm assuming that you're using the 16 pin version to provide 6...
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    05-21-2022, 02:00 AM
    It's coming along nicely, thanks. Just got the preset buttons on the Akai MIDI mapped to the QOSCs, with 8 channels in 8 columns and harmonic waveforms in rows. Now, I can select the image frequencies, plus 2 LFO's, and...
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    05-10-2022, 12:18 AM
    Paul, Just a quick heads-up regarding the missing I2S port 2 issue. Clean installs of Arduino and Teensyduino didn't fix the issue. It appears that the problem is being caused by Adafruit's Audio library ver 1.0.4...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    05-09-2022, 04:38 PM
    Thank you, Paul. That's very helpful. ".... procedures for MacOS, Windows, or Linux?" Sorry, I should have previously specified. Windows #1 procedure sounds like the best option forward. I won't waste more of your...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    05-09-2022, 01:48 PM
    Thank you, Paul for testing a Teensy 4.1 with the latest 1.57-beta1 Teensyduino. After you had explained that the Teensy will produce those DIN, FS, & BCK signals, regardless of whether the PT8211 is connected, I...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    05-09-2022, 05:22 AM
    Thank you, Paul. This is a basic Hex audio test sketch, which was working fine, prior to last night. At the time of failure, I was intermittently (between code edits and downloads) generating several (~4) 600 Hz sine...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    05-09-2022, 01:11 AM
    Yes, this is the modified pin configuration on the PT8211_2 AudioOutput object that I needed to use in order to stack the PT8211 shield with the SGTL5000 quad shields for hex audio. It worked great, until last night...
    26 replies | 592 view(s)
  • TheHermit's Avatar
    05-04-2022, 07:08 PM
    Dmax, Thanks for your feedback. Yes, I came from the days of GS124 open loop scanners and understand the inertial challenges of resonance peaks and the need for precise damping and feed back in those old scan amps. Of...
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    05-04-2022, 05:55 AM
    Dmax, This looks like a great start to something ;-) So, you're using the pixelblaze sensor to digitize ILDA imagery converted to .wav, inputting that into the Teensy, then using this differential amp circuit to...
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    04-20-2022, 05:42 PM
    Second attempt to upload schematic: Try, try, again... Got it. JPG images are displayed. PDFs aren't.😎
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    04-19-2022, 10:17 PM
    OMG! Tell me about it! $50K Spectra Physics 165 or 172 ion gas monsters to tour with. (Only CoRads did mixed gas during my time.) Uninsurable blown glass tubes inside blown glass water jackets. Must blow all the water...
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    04-19-2022, 07:32 PM
    :rolleyes: Thank you for your interest and advice. Yes, I'm using a modified ILDA conversion amp card w/differential outputs, from PLF HankLoydRight's ESP32 ILDA DAC, w/o the original ESP32 and DACs. But, initial tests...
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    04-18-2022, 02:48 AM
    Hi Folks, Just thought I'd share some 'How to's" instead of asking "How do?" To summarize in a nutshell, I'm using a T4.1 to develop a polyphonic laser synthesizer, which requires at least 5 DC coupled audio signals...
    44 replies | 1697 view(s)
  • TheHermit's Avatar
    04-02-2022, 08:39 PM
    Hello Frank, Sorry to burden you with this, but I have a question for you regarding the documentation for the PT8211_1 & PT8211_2 objects within the Audio Design Tool. Are these 2 different models of the PT8211...
    148 replies | 60389 view(s)
  • TheHermit's Avatar
    04-02-2022, 06:49 PM
    Hi Paul, Sorry to come back to this, but I still have a question. Having sat down to solder the pt8211 SMT IC onto the T4 breakout board, I see that the difference in documentation is due to the Audio Design Tool...
    148 replies | 60389 view(s)
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About TheHermit

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About TheHermit
Biography:
Old Fart
Location:
No. 1s Business, USA
Interests:
Laser Art
Occupation:
Retired

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