A mozgásérzékelő is a device designed to detect movement in a specific area. It uses various technologies, such as infrared or ultrasonic sensors, to identify changes in the environment. When movement is detected, the device can trigger alarms, lights, or other systems, making it useful for security and automation purposes. These sensors are commonly used in home security systems, smart homes, and automated lighting. They can help enhance safety by alerting homeowners to intruders or by automatically turning on lights when someone enters a room. Overall, mozgásérzékelők play a vital role in modern technology.