Quick arduino schematic question

Discussion in 'Embedded Systems and Microcontrollers' started by Shackdaddy836, Oct 28, 2011.

  1. Shackdaddy836

    Thread Starter New Member

    Dec 13, 2010
    Hey, I have this MP3 player shield schematic and I'm trying to find 5 I/O ports that I can hook up an LCD to. Problem is that this shield is connected to basically all of the I/O ports. Can someone help me look on this schematic to see if there are any pins that I can connect multiple things to?

    Here's the schematic:
    http://dlnmh9ip6v2uc.cloudfront.net/datasheets/Dev/Arduino/Shields/MP3 Shield-v13.pdf

    Not including the analog pins BTW. I know you can convert those but I need those for something else :)

    Thanks a ton for the help.
  2. hgmjr

    Retired Moderator

    Jan 28, 2005
    You could use a scheme involving 3 IO lines and a shift register similar to the one depicted in this link.