hc-sr04 ultrasonic module price in Pakistan
ULTRASONIC MODULE IN PAKISTAN
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.The basic principle of work:
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 timeÃ—velocity of sound (340M/S) /2