SainSmart Ultrasonic Module HC-SR04 Distance Sensor for Arduino UNO MEGA R3 Mega2560 Duemilanove Nano Robot XBee ZigBee

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SainSmart Ultrasonic Module HC-SR04 Distance Sensor for Arduino UNO MEGA R3 Mega2560 Duemilanove Nano Robot XBee ZigBee Description:

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

NOTE: The link is the documents about Ultrasonic
Module HC-SR04 Distance Sensor.
https://s3-

SainSmart Ultrasonic Module HC-SR04 Distance Sensor for Arduino UNO MEGA R3 Mega2560 Duemilanove Nano Robot XBee ZigBee Features:

• 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¡Ávelocity of sound (340M/S) /2
• Power supply :5V DC, quiescent current : <2mA,effectualangle: <15¡ãranging distance : 2cm~500 cm?resolution : 0.3 cm