Schematic for New Musical Interface (ATmega32u4, MUXes, and some pots)

Discussion in 'The Projects Forum' started by sycross, Jul 19, 2013.

  1. sycross

    Thread Starter New Member

    Jun 15, 2013
    2
    0
    Hello all,

    I'm working on making a PCB for a new musical interface, which consists of 48 slide potentiometers that output MIDI signals over USB.

    This is my first attempt at designing my own circuit board, and I was hoping someone might be able to look over my schematic before I begin routing. Please let me know if you see any mistakes!

    Here is the schematic:
    [​IMG]

    View full-size:
    http://sycrossmusic.com/FaderKeyboardRev1-13.jpg

    Right now, I have the HWB pin connected to ground through a 10k resistor, as well some pads which I can solder over to connect it to +5V. I've included this because I'm not sure how to best approach the bootloader. After I flash the microcontroller, I want to be able to update it purely through USB (i.e. without needing to touch the PCB, since it will be in an enclosure). I was thinking of just putting the Arduino bootloader onto it? If that's the case, can I just connect the HWB pin directly to ground?

    Any advice is appreciated.

    Best,
    Ray
     
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