Hall Effect Sensors are devices that detect the presence of a magnetic field. They work based on the Hall Effect, which occurs when a magnetic field is applied perpendicular to the flow of electric current in a conductor. This interaction generates a voltage that can be measured, allowing the sensor to determine the strength and direction of the magnetic field. These sensors are commonly used in various applications, such as automotive systems for detecting the position of crankshafts and camshafts, as well as in smartphones for detecting the opening and closing of covers. Their reliability and low power consumption make them popular in modern technology.