A simple write-up on how to use a simple, and very common ultrasound sensor with an arduino.
http://www.instructables.com/id/Very-Simple-HC-SR04-Connection-to-Arduino-Example/
A simple write-up on how to use a simple, and very common ultrasound sensor with an arduino.
http://www.instructables.com/id/Very-Simple-HC-SR04-Connection-to-Arduino-Example/