Ultrasonic Module HC-SR04 Distance Sensor For Arduino
- 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 : <2mA, effectual angle: <15°?ranging distance : 2cm~500 cm?resolution : 0.3 cm
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)*(Soni
List Price: $ 7.99
Price: $ 7.99
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