Ultrasonic sensor
An ultrasonic sensor measures distance by emitting ultrasonic sound waves and then detecting the reflected sound (echo) when it bounces back from an object. "This is an ultrasonic sensor module. If we talk about its pins, there are four pins here. You can see two connections that look like speakers, but they are not actually speakers. These are ultrasonic sensors that work based on sound waves. If you know how a whale or a bat operates, they have eyes, but they cannot see clearly. So, they emit a sound. After sending out this sound signal, it reflects back from whatever object is in front of them, and the sound returns to them. Their ears detect this returning sound and help them understand the distance and position of objects around them. This is how they navigate and fly or swim. The ultrasonic sensor module works on this very same principle. Our submarines use this technology, and whales operate in a similar way. They rely on sound waves to detect objects around them based on