Proximity sensors detect objects without physical contact. Most proximity sensors emit an electromagnetic field or beam and look for changes in the field. The object being sensed is called a target.

[mircemk] shows how to create a simple non-contact proximity sensor using little more than an Arduino Nano board, and a convenient software library intended to measure the value of capacitors. The ...

Seeing people in person matters. Information pours off them: not just what they say but how they say it and whether they listen. Relationships form more naturally. It’s much harder to look a person ...

Does how physically close the searcher is to the business impact rankings? See the evidence for (and against) it as a ranking factor. Close to a third of all Google searches have local intent – that ...

Laser Proximity Sensors use laser beams to detect the presence or absence of objects within a certain range. They are used in security systems, robotics, automation, and industrial processes, where ...