I/O mapping

A project log for Arduino Sudoku Solver

Solves Sudoku puzzles (work in progress)

hari-wigunaHari Wiguna 10/28/2014 at 02:240 Comments

D3, D4, D5, D13 are used by the LCD.
D6..D9 are keyboard rows.
A0..A3 are keyboard columns. I intentionally map these backward so the physical wiring would be pretty. :-)

WARNING: Note that the LCD is 3.3V!!!