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Light sensitive component in PIR module

E

eeh

Jan 1, 1970
0
Hi,

In most of the PIR modules, it is found that a light sensitive sensor
is also used, I want to ask what is its function, does it mean that the
PIR sensor is disabled when light is on?

Thanks!
 
R

Rene Tschaggelar

Jan 1, 1970
0
eeh said:
Hi,

In most of the PIR modules, it is found that a light sensitive sensor
is also used, I want to ask what is its function, does it mean that the
PIR sensor is disabled when light is on?

The usual application of such a dual sensor
is to switch on the light when someone/something
passes in front of the sensor when it is dark.
So, yes, during daylight, the PIR sensor doesn't
work.

Rene
 
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