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Light:
Inside the hard plastic casing, lies a photodiode which
reacts
with
photons
to
release
free
electrons
(photoelectrons). The amount of light striking the sensor
is directly proportional to the voltage generated by the
photoelectrons released. The sensor measures the
general voltage released and thus calculates the light
intensity.
If the light readout is very low, try changing the sensor's
mode to a higher sensitivity.
Barometer:
The barometer sensor uses the piezoresistive effect. The
transducer is made of two metal foils separated by
silicon; when pressure is applied on the transducer its
resistance changes. One side of it is at complete
vacuum which enables the measurement of the
absolute pressure on its other side.
Altitude:
The altitude reading is based on the barometric pressure
which is translated to meters.
Sound:
The sound sensor uses an internal microphone with a
series of circuits, filters, and amplifiers to best isolate a
specific sound source. Sound waves enter through the
hole at the top of the sensor's plastic body so you should
point it directly towards the sound source for best
readings.
V2018.01
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