What do you think of this schematic for my Arduino keypad? Are the diodes pointing the right way?
I will make col1"high" and then check pins row1, row2, row3 and row4 and see if current is flowing through. Then make col2 and col3"high" and again check if current is flowing through the row pins.
Update:
Ok so I´ll change the direction of the diodes. In my code I will declare my rows as inputs and my columns as outputs. Then I will set all columns to "HIGH". To check which keys are pressed I will set col1 to low. There should be current flowing if any key in that column is pressed. I will then check my rows if their state has changed to "LOW". I will repeat the process for col2 and col3. The anti-ghosting diodes should still work. This way it could work right?