HC-SR04 Ultrasonic sensor board

  • үнэ: 3,500 төг

Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit.


  • Using IO trigger for at least 10us high level signal
  • The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back
  • IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning
  • Test distance = (high level time×velocity of sound (340M/S) /2



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