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The Hall effect sensor module is used to detect magnetic fields and measure their strength. It works by generating a voltage output in response to changes in the surrounding magnetic field. The module can be used for proximity sensing, speed detection, and contactless switching. It provides both analog and digital outputs, making it compatible with microcontrollers like Arduino and Raspberry Pi. This sensor is commonly used in motor speed sensing, position detection, and security systems. It operates at 3.3V to 5V and offers high sensitivity with stable performance. The module is durable and works in harsh environments.