28108 Parallax Inc, 28108 Datasheet

KIT QTI BOE-BOT LINE FOLLOWER

28108

Manufacturer Part Number
28108
Description
KIT QTI BOE-BOT LINE FOLLOWER
Manufacturer
Parallax Inc
Datasheet

Specifications of 28108

Accessory Type
QTI Infrared
Product
Microcontroller Accessories
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
Boe-Bot®
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
QTI Line Follower AppKit for the Boe-Bot (#28108)
Boe-Bot Line Following with QTIs
The QTI sensor is a close-proximity infrared emitter and
receiver pair mounted on a tiny PCB. It can be used as
an analog sensor to differentiate between different
levels of infrared reflectivity. It can also be used as a
purely digital device that returns a 1 when it detects a
black line or a 0 if it detects a white background. An
array of four QTI sensors used as digital devices makes
an effective and flexible line-follower for the Boe-Bot
robot.
The QTI positions are adjustable for different sizes and
types of lines. This activity demonstrates how the QTIs
can be used for digital line following on a simple 3/4-
inch
background.
sensors function, and for the complete QTI Line Follower
source code, see the Stamps in Class “Mini Projects”
sticky-thread at the top of the Stamps in Class forum at
on http://forums.parallax.com.
For this activity, you will need to supply your own:
Kit Contents
805-00001
800-00016
150-01030
555-27401
451-00303
710-00007
700-00060
713-00007
700-00002
700-00015
Part #
wide
Built and tested Boe-Bot robot
#2 Philips-head screwdriver
Black ¾-inch electrical tape
White poster board
10-inch 3-lead extension cable
3-inch jumper wires (bag of 10)
Resistor - 10 kΩ
QTI sensor
3-pin male-male header
7/8-inch screw, pan head, 4-40
Standoff, round, 1-inch, 4-40
Spacer, round, 1/2 inch
3/8-inch screw, pan head, 4-40
Washer, nylon, #4
electrical
For an in-depth look at how the QTI
Description
tape
course
with
Web Site: www.parallax.com
Forums: forums.parallax.com
Sales: sales@parallax.com
Technical: support@parallax.com
a
Qty
4
2
4
4
4
4
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white
Office: (916) 624-8333
Fax: (916) 624-8003
Sales: (888) 512-1024
Tech Support: (888) 997-8267

Related parts for 28108

28108 Summary of contents

Page 1

... QTI Line Follower AppKit for the Boe-Bot (#28108) Boe-Bot Line Following with QTIs The QTI sensor is a close-proximity infrared emitter and receiver pair mounted on a tiny PCB. It can be used as an analog sensor to differentiate between different levels of infrared reflectivity. It can also be used as a purely digital device that returns a 1 when it detects a black line detects a white background ...

Page 2

... On the underside of the chassis, slip a 1/2-inch unthreaded spacer on each screw, followed by a 1-inch threaded standoff. Copyright © Parallax Inc. With this ' AnalogQti.bs2 ' {$STAMP BS2} ' {$PBASIC 2.5} time VAR word DO HIGH 3 RCTIME 3, 1, time DEBUG CLS, ? time PAUSE 100 LOOP QTI LIne Follower AppKit (#28108) Vdd = 5 VCD Vss = 0 V (ground) v2.0 3/23/2009 Page ...

Page 3

... Also, if you are using a HomeWork Board with your Boe- Bot, it won’t interfere with the servo connections. Copyright © Parallax Inc.  Mid left to P6  Mid right to P7 QTI LIne Follower AppKit (#28108) . v2.0 3/23/2009 Page ...

Page 4

... QTIs though! On the other hand, if only one QTI sensed 1 when the stripe was between two of them, they may need to be positioned closer together. Otherwise, your Boe-Bot is ready for line following. Copyright © Parallax Inc. QTI LIne Follower AppKit (#28108) v2.0 3/23/2009 Page ...

Page 5

... Otherwise, it should faithfully follow the line until it reaches the end of the tape. Copyright © Parallax Inc. ' qti black/white states ' Set OUTB bits Display bit positions ' Main DO...LOOP ' Get QTI states ' Display QTI states ' 1/10 s delay ' P7..P4 -> output ' Delay = 230 us ' P7..P4 -> input ' Delay = 230 us QTI LIne Follower AppKit (#28108) v2.0 3/23/2009 Page ...

Page 6

... Do nothing √ √ ' P7..P4 -> output ' Delay = 230 us √ ' P7..P4 -> input ' Delay = 230 us ' Store QTI outputs ' in INB QTI LIne Follower AppKit (#28108) is convenient for a simple Try other courses to test the limits of the program. Try modifying the program to solve courses that the unmodified program could not solve ...

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