Ultrasonic sensor

 Ultrasonic sensor



What is an Ultrasonic Sensor?

 An ultrasonic sensor is an instrument that measures the distance to an object using ultrasonic sound waves. An ultrasonic sensor uses a transducer to send and receive ultrasonic pulses that relay back information about an object's proximity.

INPUT/OUTPUT PINS 


There are only four pins that you need to worry about on the HC-SR04: VCC (Power), Trig (Trigger), Echo (Receive), and GND (Ground).

The HC-RS04 Ultrasonic sensor module has 4 pins, two pins for the power supply and one pin for sending out ultrasonic sound waves, and one pin for receiving ultrasonic sound waves.

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