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    Teeny Guitar Audio Board

    Thanks, I found these Mammoth Electronics enclosures: https://www.mammothelectronics.com/products/4s1590bbt-enclosure (4.67” x 3.68” x 1.95") https://www.mammothelectronics.com/products/4s1590bbm (4.67" x 3.654" x 1.547") Much cheaper than Digikey!
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    Teeny Guitar Audio Board

    Can anyone suggest a standard enclosure? I have some 125B size (1590N1?) which are 4.77" x 2.6" x 1.39" but they seem to be a bit shallow. My teensy 3.6 has a stacked header which makes it even worse. I may try to design and print a simple lid riser this to give more headroom. Blackaddr -...
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    Teeny Guitar Audio Board

    @Blackaddr, I took another look at the schematic sheets and realize that I was looking at the Modular sheet. It looks like it is interchangeable with the Analog pedal sheet so that you can make a modular synth with the digital board. The protection diodes are only on the Modular sheet! I was...
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    Teeny Guitar Audio Board

    @Blackaddr, Sorry, yes of course I forgot the .7V forward drop of a silicon junction diode, a schottky with half that would be good. Thanks! Also to be clear, the damage I'm worried about is in the CODEC's input pad structure before the PGA and any other downstream circuitry. The PGA can't...
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    Teeny Guitar Audio Board

    @Blackaddr and all, Does that input buffer need overvoltage protection for the codec? Both the WM8731 and the SGTL5000 specify an abs max input of AVDD+0.3V/AGND-0.3V. I'm pretty sure that my son damaged one of my SGTL5000 audio board line-in's with his overzealous guitar playing. Would a pair...
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    Does anyone have a Teensy Guitar Pedal board?

    That's all good and understood but the problem that I am trying to point out is that it is presenting the SGTL5000 with a voltage over the absolute max spec when VDDA is 1.8V. Violating the max specs may not cause an immediate failure but could affect long term reliability. One solution would...
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    Does anyone have a Teensy Guitar Pedal board?

    omjanger, Your openeffects project looks very cool. One question - in the schematic rev 2 the TL072 looks like it is biased at 2.5V and the SGTL5000's VDDA is connected to 1.8V. My son's guitar's humbuckers can output over 0.78V peak when strummed hard. So the lineins can be driven up to...
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    what is Audio Module Pin Mapping

    I made this up a long time ago for Teensy 3.2. I think it is accurate. It includes the pins for the memory expansion board so you can also free up 2,3 and 4 if you don't use it. Also the volume pot pin 15 can be freed up. // Teensy 3.2 with Audio Adaptor and Memory Expansion and volume...
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    Teensyduino 1.31 Beta #3 Available

    Thanks Paul! I will try it.
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    Teensyduino 1.31 Beta #3 Available

    Paul, I ran into an error with Beta 3 and Teensy 3.0 and the audio library. I was using Teensyduino 3.1 Beta 2, Arduino 1.6.12 on Windows 10 with a Teensy 3.0 and the Audio library to show my son how odd harmonics can create a square wave and it worked great. After Installing 3.1 Beta 3 over...
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    precise sample delay for Karplus-Strong-Algorithm

    Paul, I'm still watching the thread! The example sounds great. I went though your (wonderful) audio adapter tutorial with my son and we are planning to write our own Karplus Strong object. Now can use yours as a guide. Thanks, SteveC
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    Teensy 3.0 to Arduino R3 breakout board

    I also sent you a PM. It looks really useful. SteveC
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    Adafruit PCD8544 LCD library

    I have been trying to figure out the same linker error. I suspect this kind of error occurs because the ARM compiler is more strict about some coding issues than the AVR compiler. I haven't given up yet. SteveC
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    Adafruit PCD8544 LCD library

    Also I found the PROGMEM attribute in the pcdtest example under the library. static unsigned char PROGMEM logo16_glcd_bmp[] = I changed it to: const unsigned char logo16_glcd_bmp[] = and the compiler accepted it. I have to read up on the static qualifier. SteveC
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    Adafruit PCD8544 LCD library

    I'm trying to build the example for the Adadfruit PDC8544 LDC display: http://ladyada.net/products/nokia5110/#testing. First the compiler could not find util\delay.h and util\delay_basic.h. Then when copied and placed them directly in the example directory it complained about some inline...
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