Parallax PING Ultrasonic Sensor #28015
 

This easy-to-use distance sensor from Parallax employs sonar to detect objects from approximately 0.75 – 120 inches
(2 cm – 3 meters).
The Ping distance sensor has status LEDs and requires only one I/O pin.
The on-board three-pin header makes the PING))) compatible with a solderless breadboard.
 

Parallax’s PING))) Ultrasonic Sensor provides a very low-cost and easy method of distance measurement.
This sensor is perfect for any number of applications that require you to perform measurements between moving or stationary objects.
This ultrasonic distance sensor is widely used in robotics
applications and is also useful in security systems or as an infrared replacement.

The PING))) sensor measures distance using sonar; an ultrasonic (well above human hearing 
pulse is transmitted from the unit and distance-to-target is determined by measuring the time required for the echo return.
Output from the PING))) sensor is a variable-width pulse that corresponds to the distance to the target.

Interfacing to the BASIC Stamp microcontroller or other programmable controller is a snap:
a single (shared) I/O pin is used to trigger the Ping sensor and “listen” for the echo return pulse.
An on-board three-pin header allows the PING))) to be plugged into a solderless breadboard
(on a Boe-Bot, for example),
and to be connected to its host through a standard three-pin servo extension cable.
 

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