ULTRASONIC SENSOR HY-SRF05 / HC-SR05

Product features
Trigger Pin Format: 10 uS digital pulse
Sound Frequency: 40 kHz
Echo Pin Output: 0-Vcc
Echo Pin Format: output is DIGITAL and directly proportional with range. See our conversion formula
Product description
Ultrasonic sensors overcome many of the weaknesses of IR sensors - they provide distance measurement regardless of color and lighting of obstacles. They also provide lower minimum distances and wider angles of detection to gaurantee that obstacles are not missed by a narrow sensor beam. THIS particular model is an upgrade from the lower precision HCSR-O4. This has 5 pins and can be used in 1-pin trigger/echo or 2-pin. Measurement Procedure & Formula Distance measurements can be made with microcontrollers in a straightforward manner: You can find an Arduino Library with code here: http://forum.arduino.cc/index.php?topic=106043.0 Send a 10 uS wide pulse to the sensor on the Trigger Pin. The sensor will automatically send out a 40 kHz wave. Begin monitoring the output from the Echo Pin and When the Echo Pin goes high, begin a timer. When the Echo Pin goes low, record the elapsed time from the timer and use the following conversion formula: Distance (in cm) = (elapsed time * sound velocity (340 m/s)) / 100 / 2 Note: we divide distance by 2 because the sensor returns the round trip time, which doubles the distance measurement.