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[DPRG] Re: [SeattleRobotics] Re: "IT" to be revealed

Subject: [DPRG] Re: [SeattleRobotics] Re: "IT" to be revealed
From: David P. Anderson dpa at io.isem.smu.edu
Date: Fri Nov 30 16:51:16 CST 2001

Hi Kip

Thanks Kip!

Well, next thing I need to get working is the shaft encoders...

:)

cheers,
dpa

> 
> They work for me too.
> 
> Good job David. I am impressed.  When will we see it for real?
> 
> Kip
> 
> ----- Original Message -----
> From: "Tony Brenke" <trbrenke at yahoo.com>
> To: "David P. Anderson" <dpa at io.isem.smu.edu>; <dprglist at dprg.org>
> Cc: <seattlerobotics at yahoogroups.com>
> Sent: Friday, November 30, 2001 4:24 PM
> Subject: Re: [SeattleRobotics] Re: "IT" to be revealed
> 
> 
> > need to corect your links.
> >
> > --- "David P. Anderson" <dpa at io.isem.smu.edu> wrote:
> > >
> > > Howdy
> > >
> > > Well, I don't have a robot balancing on two wheels yet!  But I have
> > > suceeded in getting one to balance a pole with a ball on top, the
> > > classic "inverted pendulum" of which bi-pedal hominids are an example.
> > >
> > > Here's a picture of it balancing the pole/ball in my office (I don't
> > > get much real work done on Friday afternoons!):
> > >
> > > ftp://www.geology.smu.edu/pub/users/dpa/robo/nbot/b06.jpg
> > >
> > > I took one of the three wheeled bases I've been working on and extended
> > > the caster wheel to give the platform more stability.  Here it is
> > > without the pole:
> > >
> > > ftp://www.geology.smu.edu/pub/users/dpa/robo/nbot/b01.jpg
> > >
> > > The pivot has a ball bearing in one end and a 5k pot on the other:
> > >
> > > ftp://www.geology.smu.edu/pub/users/dpa/robo/nbot/b03.jpg
> > >
> > > The pot has an opamp to precondition the signal for the 8 bit A/D
> > > converter on the cpu board, an MIT 6.270 HC11 board.  It returns
> > > about 7 counts per degree.
> > >
> > > Mounted under the center of the pivot is an Analog Devices ADXL202
> > > accelerometer for evaluation.  Here's another view of the pivot:
> > >
> > > ftp://www.geology.smu.edu/pub/users/dpa/robo/nbot/b04.jpg
> > >
> > > and another view of it hovering beside me as I take it's picture,
> > >
> > > ftp://www.geology.smu.edu/pub/users/dpa/robo/nbot/b08.jpg
> > >
> > > There is a 10 Meg mpeg movie of it balancing and some of me pushing
> > > it around at:
> > >
> > > ftp://www.geology.smu.edu/pub/users/dpa/robo/nbot/balance3.mpg
> > >
> > > I'll try to make a smaller version and leave it at:
> > >
> > > ftp://www.geology.smu.edu/pub/users/dpa/robo/nbot/balance4.mpg
> > >
> > > cheers!
> > > dpa
> > >
> > >
> > > > David Peterson wrote:
> > > >
> > > > Just saw on Good Morning America that "IT" is supposed to be revealed
> on
> > > > Monday on their program. "IT" is a new invention of Dean Kamen, a
> secret
> > > > project under the name Ginger that has inspired a lot of speculation.
> A
> > > > previous invention by Kamen is the Independence 3000 iBot mobility
> > > > system, a type of balancing and stair climbing wheelchair that may
> have
> > > > inspired a few balancing robot designs ideas. The iBot was under the
> > > > project name Fred in development.
> > > >
> > > > David P
> > >
> > > To unsubscribe from this group, send an email to:
> > > SeattleRobotics-unsubscribe at egroups.com
> > >
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> http://docs.yahoo.com/info/terms/
> > >
> > >
> >
> >
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> >
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> >
> 


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