Subject:
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RE: Laser Pointers
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 14 Jan 1999 21:58:16 GMT
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Original-From:
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Schott, Wayne W (MED) <WAYNE.SCHOTT@AMERMSX.stopspamMED.GE.COM>
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Viewed:
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1044 times
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Just a thought, I haven't tried it but a small focused beam penlight
might perform better. I like the IR better because it's not obvious to
the uninformed just what is going on.
I'm going to try moving the light sensor about to scan for objects.
Wayne W. Schott
Wayne.Schott@med.ge.com
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From: Tim McSweeney[SMTP:tim@ams.co.nz]
Sent: Thursday, January 14, 1999 2:59 PM
To: lego-robotics@crynwr.com
Subject: Laser Pointers
I can't try this because I don't have a pointer, and I don't
particularly
want to use a non-lego solution but....
if you mount one of those little keychain laser pointer on top of you
bot
pointing forwards can the light sensor detect the spot in a dark room?
I
would suspect not, but It'd be interesting to try.
Even if it's only to a range of about a foot it might be worthwhile.
If the brightness does give you some idea of range the fact that it is
so
directional would mean you could scan it around to get an idea of where
obstacles lie.
Cheers
Tim
-----------------------------------------------------------------------
int main(int _,int __){int i[3]={0xFE101010,0xFE1010FE,0xFE929282};if(_
==1)for(_=0,__=0;(__<4);_=(_+1>=24)?++__+0*putchar('\n'):_+1){putchar(
main(_+2,__)?(main(_+2,__+1)?' ':'_'):' ');main(_+2,__)&&!main(_+3,__)?
putchar('/')+0x0*_++:0;}else return((_>=26)||(__>=4))?0:i[(_-2)/8]>>(3-
__)*8>>(_-2)%8&0x1;}
-----------------------------------------------------------------------
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 2 Replies:
 | | RE: Laser Pointers and IR Range finding
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| Yeah I Agree The IR is more mysterious. I was originally thinking just how cool it would be to have this little red dot that the Bot used for range finding. Thinking more about the problem of IR in a hostile environment I realised you can do (...) (26 years ago, 14-Jan-99, to lugnet.robotics)
| | | RE: Laser Pointers
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| The force of the IR proximity detection is that the IR flashes, detecting the difference in incoming light will almost certainly only detect proximity (and not overhead windows or lamps). You could propably get comparable results with any kind of (...) (26 years ago, 15-Jan-99, to lugnet.robotics)
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