Chapter 7 Nightlight Cat Bracelet Working with Light Sensors
Sensors are electronic components that detect different traits about the environment around them. In fact, you already used sensors in the projects in Chapters 3 and 4. A switch or button is a type of sensor that senses whether it is being pressed. There are also sensors that sense things like temperature, humidity, noise volume, and much, much more. In the modern world, we are surrounded by many types of sensors that are used in our electronic devices. Smartphones are packed with sensors that measure tilt, sound, touch, and more.
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