Now You have code so just Upload it on The Arduino Board.Check The circuit and connect a 9V battery to the arduino board and enjoy.

So I hope Our this post will definitely help you to make a Distance Measuring device with automatic alarm using Arduino Board and HC-SR04 ultrasonic sensor.And this device can be used in many Application and in many place with some basic modification.

Watch it In Action Here-https://youtu.be/e9tAlh4xXSk

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