SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
You buy SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue) with Coupon : TELEX will be discounted 10%
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Why Use SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue) ?
There are many good reviews about this ice maker. Most customers feel happy with the quality of this portable ice maker. There are three main ice cube sizes that are available, including small, medium, and also large. .SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue) will help your job easier dexThere 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 impulse , the module start ranging ; finish ranging , If you find an object in front , Echo pin will be high level , and based on the different distance, it will take the different duration of high level. So we can calculated the distance easily :Distance = ((Duration of high level)*(Sonic :340m/s))/2
You buy SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue) with Coupon : TELEX will be discounted 10%