HiLetgo 4pcs Ultrasonic Sensor Integrated Transceiver Waterproof Diameter 16MM

hey guys the stool cute guy here is an ultrasonic sensor and it's a great tool for electronics and for projects you can use it to make robots to make obstacle avoidance sensors to make radars you know you name it before we go ahead and get connected let's let's look at what this thing is made of so there's two kind of cylinders here which are identical looking and one of them is the transmitter and you can know it by the little T on the left side corner and this one is the receiver and that's why there's an R here so the way this works is that it sends ultrasonic waves and that's why it's called an ultrasonic sensor and this one is the HC SR 0 4 which is a model number of the sensor and it is one of the most common ultrasonic sensors which are used by by beginners to make their projects and also by professionals by the way to make their project it's a very reliable sensor and it is very