HC-SR04 Range Detector Model Distance Sensor 10pcs(Blue)

HC-SR04 Range Detector Model Distance Sensor 10pcs(Blue)Providing 2cm to 400cm of non-contact measurement- Stable performance, accurate measurement range.Features:1.The ranging accuracy can reach to 3mm.2.The modules includes ultrasonic transmitters, receiver and control circuit.3.The basic principle of work: the Module automatically sends eight 40 kHz and detect whether there is a pulse signal back.4.IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning.5.Distance = ((Duration of high level)*(Sonic :340m/s))/2. Specifications:Power supply :5V DCQuiescent current : <2mAEffectual angle: <15°Ranging distance : 2cm â€?500 cmResolution : 0.3 cmThere are 4 pins out of the module : VCC , Trig, Echo, GND.So it's a very easy interface for controller to use it ranging.The all process is :Pull the Trig pin to high level for more than 10us impulseThe module start rangingFinish rangingIf you find an object in frontEcho pin will be high levelBased on the different distance,it will take the different duration of high level.Distance = ((Duration of high level)*(Sonic :340m/s))/2Package Including:10*Model Distance Sensor(Blue)