You can buy this sensor from Filpkart by clicking here –> Ultrasonic Sensor by Rotobotix
You can view and download the datasheet of HC – SR04 Ultrasonic Sensor from here.
Pin Diagram of this HC – SR04 module is as shown in the fig. below.
Getting Started Video
I’m sharing you the Getting Started with Ultrasonic Sensor using Arduino Board video. If you have any doubt or want to ask anything regarding this, mail me at firstname.lastname@example.org
1 Height Calculator
2 Smart Mandir
3 Obstacle Avoider Robot
For details regarding lot more other projects, visit my website