Chapter 7. Light

A robot follows a complicated path, seemingly without difficulty. A closer look shows a black line on the floor for the bot to follow. Later in the evening, backyard lights light up automatically when darkness falls.

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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