https://www.branah.com/ascii-converter
http://en.wikipedia.org/wiki/Polling_%28computer_science%29
https://learn.sparkfun.com/tutorials/shift-registers
http://www.ti.com/lit/ds/symlink/sn74hc165.pdf

http://www.korero.maori.nz/sound/food/m-kai.mp3
http://www.korero.maori.nz/forlearners/basics/lessons/toru-wordlist.html
https://learn.sparkfun.com/tutorials/pull-up-resistors#calculating-a-pull-up-resistor-value