CONTACTLESS BELL

AIM

TO BUILD A CONTACTLESS DOOR BELL

REQUIREMENTS

ARDUINO UNO

ULTRASONIC SENSOR

BUZZER

WORKING

WHEN AN OBJECT SUCH AS HAND IS KEEP IN FRONT OF THE ULTRASONIC SENSOR AT A DISTANCE OF AROUND 5 CM.THEN IT WILL TURN THE BUZZER ON FOR 10 SEC AND IT WILL AUTOMATICALLY OFF.

CIRCUIT DIAGRAM

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