The types of sensors used in embedded systems
This section provides a brief overview of a variety of sensor types used in embedded systems. This list is not exhaustive, but it should give you some idea of the variety of sensors available. It is the responsibility of the embedded system architect to identify the list of particular sensor types and the specifications those sensors must meet to implement any particular system design.
Light
Light sensors in embedded systems range in complexity from simple photoresistors to sophisticated multi-band sensor arrays used in devices such as video cameras, microscopes, and astronomical telescopes.
A photoresistor is a resistive device that exhibits a decrease in resistance as the luminosity (the intensity of light) increases on its surface. Photoresistors are commonly used in applications such as nightlights and for safety-related obstacle detection by automatic garage door openers.
Photodiodes and phototransistors are semiconductor...