Vongchann Electronic - Arduino with HC SR04 Sensor test

Today I have another sensor called HC SR04. This sensor used to tell the distance between object that is right in front of it. This sensor has two special parts that we should never forget such as:

Trigger: is the part which send out the sound to hit any object in front of it
Echo: is the part which wait for the sound to come back and calculate the waiting time

According to these two parts this sensor can help use to find the distance between object that is in front of it.

In fact, Want to see how it works? Watch the video below then you will see it.