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What is Ultrasonic Sensor?

Arduino – supersonic detector. Advertisements. The HC-SR04 supersonic detector uses the measuring system to see the space of associate degree object a bit as the draft does. It offers wonderful non-contact vary detection with high accuracy associate degreed stable readings in an easy-to-use package from two cm to four hundred cm or 1” to thirteen feet.


Fig: Ultrasonic sensor

The supersonic detector sends out a high-frequency sound pulse and so times however long it takes for the echo of the sound to mirror back. The detector has two openings on its front. One gap transmits supersonic waves, the opposite receives them.


The Frequency range of the Ultrasonic sensor?

Ultrasonic sensors “are supported the mensuration of the properties of acoustic waves with frequencies higher than the human loud vary,” typically at roughly forty kc 1). They usually operate by generating a high-frequency pulse of sound and so receiving and evaluating the properties of the echo pulse.


The Ultrasonic Sensor detects the Water level :

They can mirror some of the sounds and manufacture a false echo that interferes with the power of the sensing element to properly observe the echo from the surface of the water. Advanced inaudible sensors will be adjusted to ignore these false echoes, that this allows them to supply correct water level measurements.


Ultrasonic Sensor Working Principale :

Ultrasonic sensors work by emitting sound waves at a frequency too high for humans to listen to. They then look ahead to the sound to be mirrored back, scheming distance supported the time needed. this is often just like however associated ranging|radiolocation|measuring instrument|measuring system|measuring device} measures the time it takes a nonparticulate radiation to come back once striking an object. The inaudible sensing element sends out a high-frequency sound pulse then times however long it takes for the echo of the sound to mirror back. The sensing element has a pair of openings on its front.


When the associate electrical pulse of high voltage is applied to the inaudible electrical device it vibrates across a selected spectrum of frequencies and generates a burst of sound waves. Whenever any obstacle comes sooner than the inaudible sensing element the sound waves can mirror back within the type of echo and generates an electrical pulse.

Required Parts :


  • Arduino Uno Board           [Purchase Links]           Ali-Express         Amazon
  • USB Connector                                                        Ali-Express         Amazon
  • Project Board                                                           Ali-Express         Amazon
  • Connecting Cable                                                    Ali-Express         Amazon
  • Ultrasonic Sensor                                                    Ali-Express         Amazon
  • Buzzer                                                                     Ali-Express         Amazon
  • Resistor (330 ohms)                                                Ali-Express         Amazon

Connection Diagram :


Fig: ultrasonic Connection Diagram



You can watch the following video or read the written tutorial below.