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Author Topic: maze robot for science fair  (Read 2713 times)

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Offline dellagdTopic starter

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maze robot for science fair
« on: March 09, 2009, 05:06:14 PM »
I am building a robot for the science fair and I want to make it navigate a maze.

do you think this would work for a maze robot?
I would have 5 IR LEDs placed on the front of the robot as in the pic.
If the LED C detects that there is no wall in...lets say...1-2 inches it will go forward.
if LED C detects a wall then it will ask LED A and E if there is any wall in front of them.
If they say no then the robot will turn in the direction that LED A or E is facing until LED C detects that there is no wall.
then it will go forward.
repeat.

P.S. if LED A and E detect no wall, then it will choose at random which way to turn.

P.P.S. I am putting this on the $50 dollar robot(yes, the LEDs will be level)

P.P.P.S. when I have time I will try to make the robot in sketchup
« Last Edit: March 09, 2009, 05:11:43 PM by dellagd »
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Offline cooldog

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Re: maze robot for science fair
« Reply #1 on: March 09, 2009, 05:19:13 PM »
how will the ir led's detect the wall?
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Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #2 on: March 09, 2009, 06:15:34 PM »
they will have recievers behind them.
I haven't made the code yet but the parallax Boe-Bot uses IR LED in a similar way so why wont it work here.
« Last Edit: March 09, 2009, 06:17:15 PM by dellagd »
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Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #3 on: March 09, 2009, 06:22:52 PM »
if anyone has used IR LEDs for navigation, can you plz post the code in this post
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Offline galannthegreat

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Re: maze robot for science fair
« Reply #4 on: March 09, 2009, 07:57:03 PM »
If you want to figure out distance with IR LED's you might aswell get some sharp IR rangefinders, they woulfd work nicely in that situation.
Kurt

Offline airman00

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Re: maze robot for science fair
« Reply #5 on: March 09, 2009, 08:05:23 PM »
how would it know if its going backwards
Check out the Roboduino, Arduino-compatible board!


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Offline galannthegreat

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Re: maze robot for science fair
« Reply #6 on: March 09, 2009, 08:32:58 PM »
....then some encoders.... or you might aswell look at Micromouse robots
Kurt

Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #7 on: March 10, 2009, 05:50:18 AM »
Maybe this would work.
it could have little checkpoints.
so once it got to a certain part of the maze, we block off what was behind it.
the real  part about the demonstration is that the robot can tuurn corners w/o running into walls and stuff no that it can figure out a maze.

if any of you have any Ideas on this though, plz tell me
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Offline galannthegreat

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Re: maze robot for science fair
« Reply #8 on: March 10, 2009, 11:06:59 AM »
That would be a great idea for demonstrations sake, which seems to me you want to do that, then later on add sensors for all of those other things you may want to add.
Kurt

Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #9 on: March 10, 2009, 03:12:49 PM »
I can mount the rangefinder on a servoand make it scan so I dont have to buy 3 rangefinders correct?
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Offline Razor Concepts

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Re: maze robot for science fair
« Reply #10 on: March 10, 2009, 03:14:34 PM »
Yes, but the servo might not have all the range you can get, some servos don't get full 180 degree rotation.

Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #11 on: March 10, 2009, 05:40:06 PM »
here is a pic

(yes I know that is a PING)) ultrasonic rangefinder and not a IR Rangefinder)

and yes, I know Razor, I own a 180 degree servo :D
« Last Edit: March 10, 2009, 05:41:47 PM by dellagd »
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Offline ArcMan

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Re: maze robot for science fair
« Reply #12 on: March 11, 2009, 03:13:49 PM »
if anyone has used IR LEDs for navigation, can you plz post the code in this post


This is for a line maze, but you could use similar principles for wall following.

http://www.societyofrobots.com/robotforum/index.php?topic=7076.0

Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #13 on: March 11, 2009, 03:37:08 PM »
I'm asking for code for IR recievers/ LEDS, not line following stuff.
I just want to know the code for using them.
I didn't see anything about IR LEDs in there.
« Last Edit: March 11, 2009, 03:40:45 PM by dellagd »
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Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #14 on: March 11, 2009, 03:39:59 PM »
me and my friend have until april 1st plz help!
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Offline dellagdTopic starter

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Re: maze robot for science fair
« Reply #15 on: March 12, 2009, 08:24:11 PM »
Here is another pic.
I added two IR LED/reciever combos to each side so it can detect turns at a 4-way intersecion.
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Offline Razor Concepts

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Re: maze robot for science fair
« Reply #16 on: March 12, 2009, 08:43:18 PM »
IR LEDs and receivers have a very short range, probably about an inch or so.

 


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