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 ...

But if you use two PIR sensors you can monitor a focused area for motion. The trick is to use a logic circuit. By building an AND gate you can trigger based on motion in the area which is ...

When a person walks past the sensor, it detects a rapid change of infrared energy and sends a signal. PIR sensors are used for applications such as automatically turning on lights when someone ...

A standard PIR motion sensor will struggle to pick up enough ... such as a time-based trigger that stops the light from ...

Whether you’re looking to protect something or you’re keen to see what the local wildlife is up to, a trail camera can be a ...

Why two PIR in each side? - To offer the best performance needed ... one pointing towards the floor and one pointing away from the sensor. Both beams need to trigger to confirm the detection. This ...

The DDI602U-F1 is enhanced with a microwave sensor module which increases the effectiveness and accuracy of detection. The DDI602U-F1 requires all three sensors (two PIR plus the microwave) to trigger ...