Sonar Rangefinder (HC-SR04)
Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm.
- Includes ultrasonic transmitters
- Includes 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