Learn to create a secret coded message with color.
Help Piperbot and Pip get into Maker’s City by decoding the color sequence from the color wheel. Ask: “How does the Color Sensor interpret color from light that bounces back to the sensor? Can it tell between different shades of the same color?
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Troubleshooting Tips
Is the Color Sensor not detecting color?
Ensure that the Color Sensor is on. A small switch on the Sensor must be on for it to work (you will see a white LED turn on when this is correct).
Ensure that you’ve plugged the wires into the right GPIO. Look at the Digital View to see which pin you’re affecting.
How does the Color Sensor work?
Color Sensors emit a white light and then measure the red, green, and blue wavelengths that bounce back. Based on the amount of red, green, and blue light that bounces back, we can figure out what color the Sensor looks at.
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Sensors EXPEDITION RESOURCES
Vocabulary Words
Engineer A person trained to design and build machines and structures
Sensor Device that produces an output signal for the purpose of sensing a physical phenomenon
Conditional Statement A type of coding instruction used to compare values and express and
make decisions, like an if-then statement
List Sequence of several variables, grouped together under a single name in codey