ماژول کی پد 3x4 لمسی خازنی MPR121

Details:
The MPR121 capacitive keypad uses the MPR121 and 12 touch sensitive pads to give you a simple 'keypad' with an I2C output. The board also has four mounting holes allowing it to be used as an input system in place of traditional buttons.

Note: This keypad outputs 3.3V logic. If you are using a board which only accepts 5V logic, you will run into a problem. You  need to use a logic level converter, or a board which accepts 3.3V logic.