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  1. After looking at the source code, there doesn't...

    After looking at the source code, there doesn't appear to be support for the T4 in the SD_t3. Real bummer.

    Might have to find a way to break out the bottom SPI connections into a separate board to...
  2. Adding the pull up resistors did not fix the...

    Adding the pull up resistors did not fix the problem where the LCD and SD card couldn't work at the same time, but it did fix another problem.

    I was having to unplug and re-plug in my SD card...
  3. The ILI9341 module sold by PJRC differs from the...

    The ILI9341 module sold by PJRC differs from the one sold by Adafruit.

    The SD card and LCD share a SPI bus on the module sold by Adafruit. I have gotten the two to work independently of each...
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    Yes, VIN would be your CV signa. Analoginverted...

    Yes, VIN would be your CV signa. Analoginverted would go to your analog input on the teensy in the second example, and Analognoninverted would be your analog input on the teensy in the first.

    The...
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    Here's a nice guide from PJRC themselves:...

    Here's a nice guide from PJRC themselves: https://www.pjrc.com/better-spi-bus-design-in-3-steps/

    Since the T4 digital pins are 3.3V, you don't need a tristate buffer in the MISO, MOSI and SCLK...
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    Here's a few options using the OP-amp/offset...

    Here's a few options using the OP-amp/offset circuitry:

    If you want the -5V/5V to be mapped to 0V/5V (Non inverting solution) :

    18374
    18375

    If you don't mind it being inverted, -5V/5V...
  7. Do the ILI9341 and SD libraries play nice together on the T4?

    I'm working on displaying the files from an SD card on the ILI9341 LCD I bought from Adafruit (https://learn.adafruit.com/adafruit-2-dot-8-color-tft-touchscreen-breakout-v2/overview ) It has a built...
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