hand wash Liquid dispenser by using arduino

The hand washing liquid dispenser can distribute the liquid on the hand automatically as soon as the hand is placed at the distributor, and I have used in my project this ultrasonic sensor to sense the presence of a hand at the distributor, and also used the engine Servo, where when the ultrasonic sensor senses the presence of a hand in the appropriate distance the servo rotates at an appropriate angle so that it presses the compressor of the distributor.
by Suleiman Alothman

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