CAMBRIDGE, UK — The IRS-B210ST01-R1 pyroelectric infrared (PIR) sensor is what manufacturer Murata claims to be the world's smallest at just 5.0×4.7×2.4mm, enabling the sensor to be used in compact, ...

Buy Mini Body Sensing Detector Mini PIR Motion Sensor Module – DC 3.3V-15V Body Sensing For DIY Projects Esp32 Sensors ...

Hoofddorp, Netherlands: The latest version of Murata's pyroelectric infrared (PIR) sensor is claimed by the company to be the world's smallest at 5.0 x 4.7 x 2.4 mm, enabling the sensor to be used in ...

This circuit is from the GLOLAB web page. The document referenced here includes an excellent design as well as an excellent tutorial on PIR devices. You've probably seen these devices in homes and ...