this DIY motion trigger for a DSLR is a quick and easy build, and probably loads more fun. The BOM on [Jeremy S Cook]’s build is extremely short – just a PIR sensor and an optoisolator ...

(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.

One of the most common technologies used in motion sensors is passive infrared (PIR). Our bodies emit infrared radiation in ...

As an example, [Circuit Valley] has an IKEA Vallhorn motion sensor for a teardown, it’s as you might expect, a passive infrared sensor (PIR) sensor coupled with a Zigbee interface. Inside the ...

System OverviewThis PIR model is an indoor/outdoor dual detection camera which uses both video and infrared sensor to achieve accurate motion detection functionality. It also supports active ...

It has unique microwave motion sensor module with micro-strip patch antenna. It also has advanced ASIC-based electronics height installation calibration free 2-way PIR/ microwave sensitivity ...

It also doesn’t need line of sight, as PIR does. However, it’s not as precise as technologies ... it may be worth it to not litter your home with less accurate motion sensors everywhere and could give ...