![]() The HC-SR04 module needs a 10 µs pulse from the Arduino to trigger the sound wave being emitted from the module. Since the signal first traveled to the object, then back, you can get the distance to the object by dividing by 2. So by multiplying this with the time the signal took to return, you get the distance that the signal traveled. The sensor uses a microphone to detect the echo. When the sound hits an object, this creates an echo that bounces back to the sensor. The basic principle of an ultrasonic sensor is pretty basic: It sends out a sound wave from its speaker. So to follow these instructions, your board must at least be compatible with that. ![]() Keep in mind that, in general, any kind of microcontroller should be able to run this type of project, but we’ll specifically be working with Arduino IDE. HCSR04 ultrasonic sensor lib by gamegine.To build this project you’ll need the following components You’ll understand this part better when I get into the workings of it later on. Secondly, the module makes the functionality of the sensor relatively simple. Firstly, connecting it is very straightforward as it only requires direct connections between the module and microcontroller. There are two things that make this type of sensor easy to use. And for those looking to get even more into the technicalities of the sensor, the GitHub repositories are open and available to all. This is especially true when talking about an Arduino, as there are a couple of very reliable libraries out there. ![]() But the fact is, it’s one of the most accessible and fun accessories for those who like to dabble in microcontrollers. Specifically, you’ll learn how to use the HC-SR04 module with an Arduino to measure the depth of a water tank.Īn ultrasonic sensor is one of those things that some people don’t like getting into just because it sounds complex to use and understand. In this tutorial, you’ll learn how to use an ultrasonic sensor.
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