| Brand | Unbranded |
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Check the listing for details. MPR121 capacitive touch sensor module sensor keys keyboard keys for arduino. Condition: New. Listed at 10.31 USD. The board also has four mounting holes allowing it to be used as an input system in place of traditional buttons. Check the example code below for an easy way to read the keypad. MPR121 module. Note: This keypad outputs 3.3V logic.