[Discontinued] Ultrasonic Ranging Detector Mod HC-SR04 Distance Sensor

DESCRIPTION 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 time×velocity of sound (340M/S) /2 We also have a selection of  Basic Starter Kit, Deluxe Starter Kit, Ultimate Starter Kit that utilize this module.   Wire connecting directly as following:     5V Supply     Trigger Pulse Input     Echo Pulse Output     0V Ground If you are sourcing a ultrasonic ranging module , the HC-SR04 is good choose . Its stable performance and high ranging accuracy  make it a popular module in electronic m