Third Reality has introduced the Motion Sensor R1, a device designed to improve motion detection in smart homes. This is a ...

(Passive InfraRed sensor) A device used to detect motion by receiving infrared radiation. When a person walks past the sensor, it detects a rapid change of infrared energy and sends a signal.

As an example, [Circuit Valley] has an IKEA Vallhorn motion sensor ... 8-pin chip is more elusive. The part number suggests an Analog Devices op-amp for signal conditioning the PIR output, but ...