Sensors, Transducers & Actuators
A Sensor is a device that detects and responds to input from the physical environment. The various stimuli include light, stress, heat, motion, moisture and pressure. The output is a signal that is converted to human-readable and understandable outputs. An actuator is a component of a machine that is responsible for moving and controlling a mechanism or system. A transducer is a device that converts variations physical parameters into an electrical signal, or vice versa. These are key elements of smart controlling systems and structures.