Introduction to HC-SR04,hc-sr04 pinout, hc-sr04, hc-sr04 basics, hc-sr04 ultrasonic sensor Hi Friends! I hope you are doing well. Welcome you onboard. Today, I'll discuss the basic Introduction to HC-SR04 Ultrasonic Sensor. It is an ultrasonic sensor, also known as an ultrasonic transducer that is based on a transmitter and receiver and mainly used to determine the distance from the targ ...