First, the basics. A proximity sensor is a type of sensor that senses the proximity of an object from it. There is a universe full of sensors that are available to accomplish this task and numerous technologies that allow us to do so. As the name says, the ultrasonic proximity sensor works on the principal of ultrasonic sound waves. The working principle is quite easy to understand. The ultrasonic sensor sends a beam of ultrasonic sound waves; these waves are inaudible to human ears, but nonetheless it is still a sound wave and it also behaves like a sound wave.
Now, as we know, sound bounces off different surfaces and forms an echo. You must have experienced this echo when speaking in an empty ...
