28015 Parallax Inc, 28015 Datasheet - Page 8

• Manufacturer Part Number: 28015
• Description: Optical Sensor Development Tools PING))) DISTANCE SENSOR ULTRASONIC
• Manufacturer: Parallax Inc
• Series: PING)))™r

Specifications of 28015

• Operating Voltage: 5 V
• Operating Current: 30 mA
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Description/function: Proximity Sensor
• Sensing Distance: 0.787" ~ 118.110" (20mm ~ 3m) ADJ
• Sensor Type: UltraSonic
• Sensing Object: Metallic and Non-Metallic
• Response Frequency: 40kHz
• Material - Body: -
• Shielding: Unshielded
• Voltage - Supply: 5V
• Output Type: Pulse Output
• Terminal Type: 3-Wire
• Package / Case: 3-SIP
• For Use With/related Products: Basic Stamp
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Propeller Microcontroller
{{
***************************************
*
*
* Author: Chris Savage & Jeff Martin *
* Started: 05-08-2006
***************************************
Interface to Ping))) sensor and measure its ultrasonic travel time. Measurements can be in
units of time or distance. Each method requires one parameter, Pin, that is the I/O pin that
is connected to the Ping)))'s signal line.
--------------------------REVISION HISTORY--------------------------
}}
CON
PUB Ticks(Pin) : Microseconds | cnt1, cnt2
''Return Ping)))'s one-way ultrasonic travel time in microseconds
PUB Inches(Pin) : Distance
''Measure object distance in inches
PUB Centimeters(Pin) : Distance
''Measure object distance in centimeters
PUB Millimeters(Pin) : Distance
''Measure object distance in millimeters
Copyright © Parallax Inc.
v1.1 - Updated 03/20/2007 to change SIG resistor from 10K to 1K
┌───────────────────┐
│┌───┐
││ ‣ │ PING))) │ ‣ ││
│└───┘
│
└─────┬───┬───┬─────┘
TO_IN = 73_746
TO_CM = 29_034
outa[Pin]~
dira[Pin]~~
outa[Pin]~~
outa[Pin]~
dira[Pin]~
waitpne(0, |< Pin, 0)
cnt1 := cnt
waitpeq(0, |< Pin, 0)
cnt2 := cnt
Microseconds := (||(cnt1 - cnt2) / (clkfreq / 1_000_000)) >> 1
Distance := Ticks(Pin) * 1_000 / TO_IN
Distance := Millimeters(Pin) / 10
Distance := Ticks(Pin) * 10_000 / TO_CM
(C) 2006 Parallax, Inc.
GND +5V SIG
│ │
 └┘
Ping))) Object V1.1
 1K
└ Pin
┌───┐│
└───┘│
│
Connection To Propeller
Remember PING))) Requires
+5V Power Supply
PING))) Ultrasonic Distance Sensor (#28015)
*
*
*
' Inches
' Centimeters
' Clear I/O Pin
' Make Pin Output
' Set I/O Pin
' Clear I/O Pin (> 2 μs pulse)
' Make I/O Pin Input
' Wait For Pin To Go HIGH
' Store Current Counter Value
' Wait For Pin To Go LOW
' Store New Counter Value
' Distance In Inches
' Distance In Centimeters
' Distance In Millimeters
' Return Time in μs
v1.5 2/15/2008 Page 8 of 12