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i 1 3 LIGHT SENSOR
MEET THE BIT
Use this Bit to control your circuits with light! The amount
of light shining on the sensor will change how your circuit
behaves. It's a great way to activate your circuit without
hands and is perfect for alarms!
MINI-CHALLENGE
Can you invent something that moves when the lights go out?
SAMPLE CIRCUIT
o9 BARGRAPH
p1 POWER
i13 LIGHT SENSOR
REAL WORLD ANALOGIES
PHOTOGRAPHER'S
NIGHT LIGHT SENSOR
LIGHT METER
light or dark
MODE:
"–" decrease,
SENSITIVITY:
" + " increase
This is the component that
measures light.
FINGER PULSE METER
HOW IT WORKS
The light sensor measures
how much light is shining
on it. It has two modes.
In
mode, as the
LIGHT
light shining on the sensor
gets brighter, more signal
passes through it (making
lights brighter or motors
turn faster). In
mode,
DARK
the signal increases as it
gets darker.
Use the purple screwdriver to
turn the dial and adjust how
much light it takes to change
the signal. Clockwise
increases sensitivity, counter
clockwise decreases it.
7
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