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
    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:

    View full-size:

    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.