Pyroelectric infrared sensor is a sensor
that uses the characteristics of spontaneous polarization of materials
with temperature change to detect infrared radiation, using dual
sensitive element design, internal installation of patch, resistance,
capacitor filtering to enhance the ability to interfere with radio
frequency, high working stability of the sensor. This product is widely
used, such as smart toys, automatic light switches, induction doors,
etc., especially suitable for smart toy applications.