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Colour Sensor
The digital Colour Sensor can detect the colour or intensity of any
light that passes through its lens. This sensor can be used in three
different modes: Colour Mode, Reflected Light Intensity Mode, and
Ambient Light Intensity Mode.
In Colour Mode, the Colour Sensor recognizes seven colours –
black, blue, green, yellow, red, white, and brown – plus No Colour.
This ability to differentiate between colours means your robot might
be programmed to sort coloured balls or blocks, speak the names
of colours as they are detected, or stop action when it sees red.
In Reflected Light Intensity Mode, the Colour Sensor measures the
intensity of light reflected back from a red light – emitting lamp. The
sensor uses a scale of 0 (very dark) to 100 (very light). This means
your robot might be programmed to move around on a white surface
until a black line is detected, or to interpret a colour-coded
identification card.
In Ambient Light Intensity Mode, the Colour Sensor measures the
strength of light that enters the window from its environment, such
as sunlight or the beam of a torch. The sensor uses a scale of 0
(very dark) to 100 (very light). This means your robot might be
programmed to set off an alarm when the sun rises in the morning,
or stop action if the lights go out.
The sample rate of the Colour Sensor is 1 kHz.
For the best accuracy, when in Colour Mode or Reflected Light
Intensity Mode, the sensor must be held at a right angle, close to
– but not touching – the surface it is examining.
For more information, see Using the Colour Sensor in the EV3
Software Help.
EV3 Sensors
Colour Mode
Reflected Light Intensity Mode
Ambient Light Intensity Mode
Colour Sensor
EV3 TECHNOLOGY