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An automatic door bell is an interesting concept in which we build a circuit and install this automatic doorbell using object detection circuit to our home. Then, the circuit will automatically sense the presence of the person and it rings the doorbell. As a result, the person who comes to our house need not search for the doorbell and press it any more. If you are interested to build this circuit for your home, visit http://www.electronicshub.org/automatic-doorbell-with-object-detection/
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