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A smart dustbin works on a simple automation principle using an ultrasonic sensor, an Arduino board, and a servo motor. The ultrasonic sensor continuously measures the distance in front of the bin by sending and receiving sound waves. When a hand comes close, the distance changes and the sensor sends this signal to the Arduino. The Arduino processes the input and activates the servo motor, which rotates to open the lid. After a few seconds, if no object is detected again, the Arduino signals the

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