This circuit can be used to check, for example, whether the door of a refrigerator has been properly closed. An LED sends out a beam of light, which, if the door is closed, is reflected. An optical ...

Cameras, light barriers, and movement sensors have one thing in common: they work with light sensors that are already found in many applications. In future, these sensors might also play an important ...

When using photoelectric sensors, the most reliable method to detect objects is via a light barrier, as this does not rely on the reflection of light from the target object. Implementation of more ...

The Fraunhofer Institutes for Applied Polymer Research and Computer Architecture and Software Technology in Germany have devised a way of increasing building security with a relatively simple alarm.

As electronics seamlessly weave their way into our lives, sensors play an increasingly important role. Light sensors are among the simplest and cheapest sensors, allowing their inclusion into numerous ...

An overwhelming majority of handheld devices these days have ambient light sensors built into them. A large percentage of TVs and monitors do, too, and that proportion is growing. The sensors allow ...

Cameras, light barriers, and movement sensors have one thing in common: They work with light sensors that are already found in many applications. In future, these sensors might also play an important ...