Adafruit capacitive touch shield for arduino mpr121 adafruit 2024 p the adafruit capacitive touch shield for arduino lets your next project get super interactive with 12 x touchable objects as its user interface the requirements for the touchable objects is pretty broad they can be made of metal or contain water like fruit or be conductive like the graphite in a pencil it talks to the arduino via i2c keeping the demands on the microcontroller low there are lots of possibilities with t