Find out about the design and technology of some of the most widely used sensors, such as remote controls, cameras and alarms. Get an in-depth understanding of the basic principles behind each sensor with detailed diagrams and simple experiments. And learn how to make four different types of sensors, including a thermometer, a barometer and a pinhole camera. This series of books takes you inside the instruments, gadgets and machines that we use in our everyday lives. Learn about how they work and how to make some of them yourself!