HC-SR04 Ultrasonic sensor board
- үнэ: 4,500 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.
Description:
- 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
