I'm currently setting up the same circuit with a 3x4 keypad. You mention the resistors to pull the other pins high. With a typical keypad -> micro input, do these resistors go in series with the input lines, or in parrallel with ground? I am just testing my keypad scan program, but the button presses are not registering.
Thanks for the help...sorry to highjack
Thanks for the help...sorry to highjack