Figuring out the keypad

A project log for Arduino Sudoku Solver

Solves Sudoku puzzles (work in progress)

hari-wigunaHari Wiguna 10/28/2014 at 02:210 Comments

Using a multimeter, I deduced the rows and columns matrix of the keypad.
Incidentally, there is as much as 2K resistance on they keypress, so I could not use the beeper on the multimeter.