The touch sensor can detect the human touch by sensing the change of capacitance. Based on the touch IC TTP223-BElecrow Crowtail- Touh Sensor is easy to install in projects, users can easily install it onto cases or other internal materials. https://elecena.pl/product/6057227/crowtail-touch-sensor-2-0 2016-05-07 https://elecena.pl/product/6057227/crowtail-touch-sensor-2-0 2025-12-17