Difference between revisions of "Line follower"

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[[Image:Line_follower_11.jpg|500px|right]]
[[Image:Line_follower_view.jpg|500px|right]]
A line follower built for as part of an electronics course. Design and construction is done from scratch.
A line follower built for as part of an electronics course, ELE103 at UiA. Design and construction is done from scratch and uses only analog sensors to direct itself around course made of black tape.


Consists of elements from analog sensing, digital logic, and driver circuits.
Uses elements from analog sensing, digital logic, and driver circuits.
 
* [http://www.youtube.com/watch?v=VlxQkYb_h7w Video of line follower in action] - Youtube video


== Outline ==
== Outline ==
Line 8: Line 10:


* An autonomous unit following a dark line on a bright background
* An autonomous unit following a dark line on a bright background
* Logic, 1 (5V) when detector is over line, otherwise logic 0 (0V), CMOS technology
* Logic 1 (5V) when detector is over line, otherwise logic 0 (0V), CMOS technology
* Motors controlled by driver circuit
* Turn off when no line under detectors
* Turn off when no line under detectors
* Steering right/left accomplished in 3 phases; straight ahead, 5 degree, and 10 degree
* Steering right/left accomplished in 3 phases; straight ahead, 5 degree, and 10 degree
* Powered by a battery power source
* Powered by a battery power-source
 
== Report ==
Below is the corresponding report and further details. It's in norwegian but it should be possible to translate it using some online service.
 
* [http://beta.ivancover.com/electronics/ele103_logisk_krets_for_linjefoelger.pdf Line Follower report May 2010] - In norwegian, PDF
 
== Video ==
The video below shows how the line follower works.


== BOM ==
<html><object width="640" height="385"><param name="movie" value="http://www.youtube-nocookie.com/v/VlxQkYb_h7w?fs=1&amp;hl=en_US&amp;rel=0"></param><param name="allowFullScreen" value="true"></param><param name="allowscriptaccess" value="always"></param><embed src="http://www.youtube-nocookie.com/v/VlxQkYb_h7w?fs=1&amp;hl=en_US&amp;rel=0" type="application/x-shockwave-flash" allowscriptaccess="always" allowfullscreen="true" width="640" height="385"></embed></object></html>
* 1 L293D motor driver
* 5 QRD1114 IR LED and Phototransistor sensor
** '''Or''', 5 LED red
*** 5 SD5443 phototransistor
* 1 BC546B BJT transistor
* 2 GM8 motor and wheel kits
** GMPW Deal
* 2 GMB28 GM8 gear motor bracket
* 1 RE210-S1 Protot.card 100x160
* 1 9v battery connector
* 1 LM2937 5v voltage regulator
** '''Or''', 7805 5v voltage regulator
* 3 4071 Quad OR-gates
** '''Or''', 2 4072 Dual 4-input OR-gates
* 1 4069 Hex NOT-inverters
* 1 1N4148 diode small signal
* 1 SWT1 SPDT Switch
* x 10k Resistors
* '''Or''', RT20k 20k Multi-turn trimpot


== Photo gallery ==
== Photo gallery ==

Revision as of 01:13, 13 February 2013

Line follower view.jpg

A line follower built for as part of an electronics course, ELE103 at UiA. Design and construction is done from scratch and uses only analog sensors to direct itself around course made of black tape.

Uses elements from analog sensing, digital logic, and driver circuits.

Outline

The project had the following outline:

  • An autonomous unit following a dark line on a bright background
  • Logic 1 (5V) when detector is over line, otherwise logic 0 (0V), CMOS technology
  • Motors controlled by driver circuit
  • Turn off when no line under detectors
  • Steering right/left accomplished in 3 phases; straight ahead, 5 degree, and 10 degree
  • Powered by a battery power-source

Report

Below is the corresponding report and further details. It's in norwegian but it should be possible to translate it using some online service.

Video

The video below shows how the line follower works.

Photo gallery