Team 1.2 – Schematics

3x4_Matrix_CircuitAbove is the main schematic we used for our project which helped us figure out what pins corresponded to which row and column as well as how a specific keys location was relayed to the board. The schematic details the conductors associated with each row and each column. The keypad we used for our project has 4 rows and 3 columns for 12 total buttons, but only 7 data pins. To read which button was pressed at any given time, we energized the voltage on each row while checking for a column inputs.

Here is a diagram of how each row and column was wired to the A3BU:keypad_hardware_schematic (1)