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Ultrasonic sensor arduino 4 pin1/10/2024 ![]() Now, to calculate the distance using the above formula, we should know the Speed and time. The Ultrasonic transmitter transmits ultrasonic wave pulse, this wave travels in the air and when it gets objected by any material or obstacle it gets reflected back toward the sensor or in other words when an obstacle detected waves reflects back towards the sensor, this reflected wave is observed by the Ultrasonic receiver see picture below The sensor works with the simple formula that is Distance = Speed × Time Generally Ultrasonic sensor is used in applications where measuring distance and/or sensing objects is required. In simple terms, we can say Trig is a transmitter and the Echo is a receiver. We know the velocity of sound is 343 m/s & if we can get time taken by the wave to travel, then, we can easily calculate distance between the sensor and the obstacle. The ultrasonic sensor is a sensor which emits ultrasonic sound waves from its transmitter and this sound wave returns back to the receiver of the sensor after reflecting from an obstacle or surface and calculates the total time taken by the wave to get return. ![]() In this tutorial, we will see how to interface ultrasonic sensor with arduino and how to get its output on the serial monitor.
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