SainSmart HC-SR04 Ranging Detector Mod Distance Sensor (Blue)
Category: Car Audio or Theater
Buy New: $0.10
as of 1/29/2015 11:33 EST details
You Save: $11.90 (99%)
New (29) Used (1) from $0.10
Seller: Nunu Co.
Sales Rank: 1,284
Shipping Weight (lbs): 0
Dimensions (in): 1.3 x 0.4 x 0.1
Legal Disclaimer: HC-SR04 Ultrasonic Sensor Distance Measring Module Clone; works and functions exactly like the original.
Availability: Usually ships in 1-2 business days
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| • ||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|
| • ||Power supply :5V DC, quiescent current : |
There 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
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