User:0862093/Joeke Prototype Sensor 15 16

PIR SENSOR

'A passive infrared sensor (PIR sensor) is an electronic sensor that measures infrared (IR) light radiating from objects in its field of view.
They are most often used in PIR-based motion detectors.
The term passive in this instance refers to the fact that PIR devices do not generate or radiate any energy for detection purposes.
They work entirely by detecting the energy given off by other objects.[1] PIR sensors don't detect or measure "heat"; 
instead they detect the infrared radiation emitted or reflected from an object.'
-Wikipedia

TEST #1

Making a simple prototype with the PIR sensor, an arduino and a LED, [with a little help from this tutorial]:

The arduino code: