The Ping))) Ultrasonic Distance Sensor measures the roundtrip echo time of ultrasonic sound to determine how far away an object is. It can measure distances anywhere from 3 centimeters to 3 meters. In addition to being a great distance sensor for robots, it’s also useful for detecting people passing through doorways, viewing art exhibits, approaching holiday props, and more.
Parallax PING))) Ultrasonic Distance Sensor (left) and Parallax Laser PING (right).
ActivityBot Alert! Use a different I/O pin if your board is on a robot - a servo is connected to P15!
Use a 2 k-ohm resistor (red-black-red) between the PING))) sensor's SIG pin and the Propeller I/O pin.
Using the connections shown in the wiring diagram above, this example will display PING))) distance measurements in the Terminal Window.