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Smiley is a surface-mount PCB smile sensor I made in Circuit Design and Prototyping class. With electrodes on face, it is able to detect the smile level of the user, and acts as a data generator to pass data to microcontroller e.g. Arduino.
I used it for one of the two-people mask Duet in my thesis MASK, which enables people to have nonverbal communication, smiles :)
