CHAPTER 3
Sensor Projects
THIS CHAPTER IS ALL ABOUT sensing inputs from the real world around us. We can use this information to control outputs such as motors and lights, or we simply display the information. This chapter includes a variety of different sensor projects that could be used to create robotics, weather stations, flood warning systems, day/night switches, and location-based projects.
Project 8Scanning Sonar
Scanning sonar using ultrasonic sensors is the most convenient way of sensing the distance of objects around us. An ultrasonic sensor generates high-frequency sound waves and receives back an echo of those sound waves. The sensor then calculates the time interval between sending the high-frequency sound wave and receiving the ...
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