Choosing Self-capacitance and Mutual-capacitance as per the Application in PSoC® 4 – KBA220228

Version 3

    Version: **

     

    Translation - Japanese:  PSoC®4のアプリケーションによる自己容量と相互容量の選択 –  KBA220228 - Community Translated (JA)

     

    Question:

    How do I choose between self-capacitance and mutual-capacitance for an application?

     

    Answer:

     

    The following table lists the preference for choosing self- or mutual-capacitance sensing for different applications:

    Usage

    Self-capacitance

    Self-capacitance + Shield

    Mutual-capacitance

    Regular buttons or Sliders (no waterproofing)

    Preferred

    Preferred

    Preferred

    Waterproof buttons or Sliders

    Not Preferred

    Preferred

    Not preferred

    Matrix keyboards (one button at time)

    Preferred

    Preferred

    Preferred

    Matrix keyboards (multiple buttons at time)

    Not Preferred

    Not

    Preferred

    Preferred

    Proximity sensors

    Less Preferred

    Preferred

    Less Preferred

    Liquid level sensors

    Preferred

    Preferred

    Preferred

    Encoders or Position sensors

    Less Preferred

    Less Preferred

    Preferred