![]() Image 1: Arduino Ultrasonic Sensor 1.2 What is HC-SR04 Ultrasonic Sensor So, to calculate how far the object is, we should divide the distance by 2. That is first from the ultrasonic sensor and then back to the sensor after reflection. It is because sound waves have a double space. Now, you must be wondering why the distance has been divided by 2. The following equation will further clarify your concept: In other words, it is the time taken to transmit and receive the sound wave. Its working phenomenon is to send out a sound wave traveling at an ultrasonic frequency and then hold up until the body/object reflects the wave.Īfter that, the time delay between the wave transmitting and coming back is used to measure the distance. ![]() We will assume you are a beginner and start explaining everything right from the basics.ġ、Ultrasonic Sensor Arduino 1.1 What is Ultrasonic SensorĪn Ultrasonic Sensor is a module that calculates the distance from an obstacle/ body using sound waves. ![]() This guide will tell you about Ultrasonic Sensor and how it works with the Arduino microcontroller. The HC-SR04 Arduino Ultrasonic Sensor is the second proximity sensor ideal for distance measurement and object/obstacle avoidance applications. You are at the right place! We will tell you exactly how you can achieve these purposes with a distance sensor. Are you thinking of giving your Arduino eyes or maybe spatial awareness? Just because you don't want your robot to crash or fall off a table!Īlternatively, perhaps you are thinking of making a parking sensor, a water level sensor, or a distance-measuring device.
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