910-28015B Datasheet 910-28015B, 28015, 910-28015A | P1-P3

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PING))) Ultrasonic Distance Sensor (#28015)

The Parallax PING)))™ ultrasonic distance sensor provides precise, non-contact distance measurements

from about 2 cm (0.8 inches) to 3 meters (3.3 yards). It is very easy to connect to microcontrollers such

as the BASIC Stamp

, Propeller chip, or Arduino, requiring only one I/O pin.

The PING))) sensor works by transmitting an ultrasonic (well above human hearing range) burst and

providing an output pulse that corresponds to the time required for the burst echo to return to the

sensor. By measuring the echo pulse width, the distance to target can easily be calculated.

Features



Range: 2 cm to 3 m (0.8 in to 3.3 yd)

 Burst indicator LED shows sensor

activity

 Bidirectional TTL pulse interface on a

single I/O pin can communicate with 5 V

TTL or 3.3 V CMOS microcontrollers

 Input trigger: positive TTL pulse, 2 µs

min, 5 µs typ.

 Echo pulse: positive TTL pulse, 115 µs

minimum to 18.5 ms maximum.

 RoHS Compliant

Key Specifications



Supply voltage: +5 VDC

 Supply current: 30 mA typ; 35 mA max

 Communication: Positive TTL pulse

 Package: 3-pin SIP, 0.1” spacing

(ground, power, signal)

 Operating temperature: 0 – 70° C.

 Size: 22 mm H x 46 mm W x 16 mm D

(0.84 in x 1.8 in x 0.6 in)

 Weight: 9 g (0.32 oz)

Pin Definitions

GND Ground (Vss)

5 V 5 VDC (Vdd)

SIG Signal (I/O pin)

The PING))) sensor has a male 3-pin header used to supply

ground, power (+5 VDC) and signal. The header may be plugged

into a directly into solderless breadboard, or into a standard 3-

wire extension cable (Parallax part #800-00120).

Dimensions

Communication Protocol

The PING))) sensor detects objects by emitting a short ultrasonic burst and then "listening" for the echo.

Under control of a host microcontroller (trigger pulse), the sensor emits a short 40 kHz (ultrasonic) burst.

This burst travels through the air, hits an object and then bounces back to the sensor. The PING)))

sensor provides an output pulse to the host that will terminate when the echo is detected, hence the

width of this pulse corresponds to the distance to the target.

Host Device Input Trigger Pulse t

OUT

2 µs (min), 5 µs typical

PING)))

Sensor

Echo Holdoff t

HOLDOFF

750 µs

Burst Frequency t

BURST

200 µs @ 40 kHz

Echo Return Pulse Minimum t

IN-MIN

115 µs

Echo Return Pulse Maximum t

IN-MAX

18.5 ms

Delay before next measurement 200 µs

Practical Considerations for Use

Object Positioning

The PING))) sensor cannot accurately measure the distance to an object that: a) is more than 3 meters

away, b) that has its reflective surface at a shallow angle so that sound will not be reflected back towards

the sensor, or c) is too small to reflect enough sound back to the sensor. In addition, if your PING)))

sensor is mounted low on your device, you may detect sound reflecting off of the floor.

a. b. c.

Target Object Material

In addition, objects that absorb sound or have a soft or irregular surface, such as a stuffed animal, may

not reflect enough sound to be detected accurately. The PING))) sensor will detect the surface of water,

however it is not rated for outdoor use or continual use in a wet environment. Condensation on its

transducers may affect performance and lifespan of the device.

Air Temperature

Temperature has an effect on the speed of sound in air that is measurable by the PING))) sensor. If the

temperature (°C) is known, the formula is:



m/sT0.6331.5C

Cair



The percent error over the sensor’s operating range of 0 to 70 ° C is significant, in the magnitude of 11

to 12 percent. The use of conversion constants to account for air temperature may be incorporated into

your program (as is the case in the example BS2 program given in the Example Programs section below).

Percent error and conversion constant calculations are introduced in Chapter 2 of

Smart Sensors and

Applications

, a Stamps in Class text available for download from the 28029 product page at

www.parallax.com.

P1-P3 P4-P6 P7-P9

910-28015B

Mfr. #:

Buy 910-28015B

Manufacturer:

Parallax

Description:

Processor Accessories Ping Ultrasonic Sen plus Protector Stand

Lifecycle:

New from this manufacturer.

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910-28015B

910-28015B

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