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Make: Sensors by Ville Valtokari, Kimmo Karvinen, Tero Karvinen

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Chapter 7. Light

Because color is reflected light, sensors can detect the color of a surface. With some creatively applied tubing, the direction of light can be detected, too. And if fire is the thing for your bot, there is a sensor for flame.

Do you want to measure human movement with infrared (IR) light? See Experiment: Burglar Alarm! (Passive Infrared Sensor). Need to know if an object is nearer than a given distance, using IR? See Experiment: Detect Obstacles With Infrared (IR Distance Sensor).

Experiment: Detecting Flame (Flame ...

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