RioRand HC-SR04 Ranging Detector Mod Distance Sensor (Blue)

  • Product Code: r1976
  • Availability: In Stock
  • Overview
  • Powered by RioRand Advanced Technology
  • $13.66


There are 4 pins out of the module: VCC , Trig, Echo, GND . So it's a very easy interface for controller to use it ranging.
The all process is : pull the Trig pin to high level for more than 10us impulse , the module start ranging ;
finish ranging , If you find an object in front , Echo pin will be high level , and based on the different distance, it will take the different duration of high level. So we can calculated the distance easily :Distance = ((Duration of high level)*(Sonic :340m/s))/2