Description
- This membrane keypad with an adhesive back has a 3×4 matrix of numbers including 0-9 and with the ‘*’ and ‘#’ symbols for good measure.
- The membrane is a thin but rugged plastic with adhesive on the back. The protective liner can be left in place to keep the keypad mobile or it can be removed and the keypad permanently mounted if desired.
- The MCU monitors for key presses by setting a row or column as an output and setting the pins LOW one at a time. It then looks for a LOW logic level on one of the pins on the opposite axis. It does this in a continual scanning process.
PACKAGE INCLUDES:
- Membrane Keypad 3×4 Matrix