Description
HC-SRF05 is a non-contact range finder based on the ultrasonic sonar technique. The device send sonar burst of ultrasonic sound waves from the transmitter end, ultrasonic sound is sound waves of frequency more than 20 KHz (not audible to human ears). Dolphins and bats use this principle to detect obstacle in front of them. The receiver end of the sensor detects received deflected sound signal from any obstacle or wall, in this way one can use the time taken by the sensor in sending and receiving the sound signals for the calculation of the distance of the wall or obstacle from the sensor.
