Alt-BEAM Archive
Message #09005
To: beam@sgiblab.sgi.com
From: Dave Hrynkiw dave@solarbotics.com
Date: Mon, 10 Jan 2000 18:50:22 -0700
Subject: [alt-beam] Re: parts source
At 05:52 PM 1/10/00 , Bumper314@aol.com wrote:
>yeah but flat sided ness is what some people are really looking for...you can
>solder to them alot easier...i would go for those if i could build anymore
Flat sides mean that they went cheap on the magnets. They won't have as
good performance as fully cylindrical motors (assuming same magnets). As
for soldering on flats vs. cylinders, I'd take better performance anyday
for the extra effort.
Regards,
Dave
---------------------------------------------------------------
"Um, no - that's H,R,Y,N,K,I,W. No, not K,I,U,U, K,I,_W_. Yes,
that's right. Yes, I know it looks like "HOCKYRINK." Yup, only
2 vowels. Pronounciation? _SMITH_".
http://www.solarbotics.com
9006 Mon, 10 Jan 2000 18:45:24 -0700 [alt-beam] Re: SV: BIPEDS Was: Pressure Sensors beam@sgiblab.sgi.com Senior Timothy Flytcher wrote:
> I say that you cannot derive which system is used simply by lookingat the
> shocks... or am I wrong???
> Timothy...
Nope, that's exactly right. My thinking was that if it walked
statically balanced, it wouldn't need shock absorbers because you could
just move the foot slowly. If it was walking dynamically balanced, it
doesn't have so much control over how hard the feet hit the ground, and
their would be a need for shock absorption. However, you're right, you
could use shock absorbers either way.
Anyways, has any body constructed a biped yet? Any pics? I've got a
pretty nice 8 motor design modeled on Honda's P3. It's just a design
however :( When I'm able to fork out $80 I'll holler!
Kyle
9007 Mon, 10 Jan 2000 18:46:47 -0700 [alt-beam] Re: SIMPLIFIED D1 CIRCUIT beam@sgiblab.sgi.com Senior Sorry, didn't get the circuit...
Wilf Rigter wrote:
>
> Hello Scott,
>
> This little circuit uses a pies speaker to make a wide range of nice
> warbling songbird sounds with a bit of chaos thrown in to keep things
> interesting. Note the capacitive modulation input to the bicore sound
> generator. The circuit responds to light by changing it's sound repertoire.
9008 Mon, 10 Jan 2000 18:49:43 -0800 (PST) [alt-beam] Re: Canada FIRST beam@sgiblab.sgi.com "J. Parks" There are three teams here in Washington. I'm on the Bellarmine
Prep / University of Washington team. We've got some kind of ball
gathering objective. It's kind of abstract, but it looks like fun.
-Jake
On Tue, 11 Jan 2000, Mike Kulesza wrote:
> Hello...
>
> Anybody else in high school here taking part in the Canada or USA FIRST
> Robotics Competition?
>
> I am on the Gordon Graydon team... We just goit the parts today. This year
> the competition is robo-hockey.
> ______________________________________________________
>
9009 Mon, 10 Jan 2000 22:13:11 -0500 (EST) [alt-beam] Re: SV: BIPEDS Was: Pressure Sensors beam@sgiblab.sgi.com jester96beam@iname.com Hey I'm just about to pay a little over $80 for my next robotics project. Send ME the idea if ya want ;-)
Maybe I'll try to built it (if you don't mind) because a biped would be cooler than the 5 motor walker I'm making.
Chris
> Anyways, has any body constructed a biped yet? Any pics? I've got a
> pretty nice 8 motor design modeled on Honda's P3. It's just a design
> however :( When I'm able to fork out $80 I'll holler!
>
> Kyle
>
---------------------------------------------------
Get free personalized email at http://www.iname.com
9010 Mon, 10 Jan 2000 22:18:37 -0500 [alt-beam] Re: parts source beam@sgiblab.sgi.com Jonathan D Rogers Well, that's OK because BG Micro has them for $1.75 each, no joke. The
picture is REALLY small, though, so I can't tell if it has flat sides.
But look at it this way: Solarbotics charges $10 for similar motors. For
those on a budget, surplus(even with slightly less performance)is the way
to go.
Speaking of Solarbotics:
Does anyone know how long it takes for Canadian Airmail from them to get
to, say, Georgia(where I live)? Just curious...
And if anyone wants to scrutinize those BG Micro motors, just surf on
over to www.bgmicro.com.
All Electronics has Namiki motors, but I don't have a recent catalog from
them so I'm not sure what they cost...
Jonathan
9011 Mon, 10 Jan 2000 22:24:01 EST [alt-beam] Re: New(?) FLED variant beam@sgiblab.sgi.com Bumper314@aol.com In a message dated 1/10/00 6:44:46 PM Mountain Standard Time,
sparkyg@seark.net writes:
> look mom! no photodiodes!
> -Sparky
Looking at it again...makes me ask, how is it phototropic?
steve
9012 Mon, 10 Jan 2000 22:25:31 EST [alt-beam] Re: parts source beam@sgiblab.sgi.com Bumper314@aol.com In a message dated 1/10/00 7:25:51 PM Mountain Standard Time,
dave@solarbotics.com writes:
> Flat sides mean that they went cheap on the magnets. They won't have as
> good performance as fully cylindrical motors (assuming same magnets). As
> for soldering on flats vs. cylinders, I'd take better performance anyday
> for the extra effort.
Well I'm sure you have seen the inside of one of those namiki's...now thats a
small magnet. Although i doubt the proformance can be argued here.
steve
9013 Tue, 11 Jan 2000 14:58:55 +1100 (EST) [alt-beam] Re: New(?) FLED variant beam@sgiblab.sgi.com (mailing list) Hitch Bencock > > look mom! no photodiodes!
> > -Sparky
>
> Looking at it again...makes me ask, how is it phototropic?
>
> steve
>
Believe it or not, a FLED needs more current when placed in a dark
environment than in a light one. So the FLED that is on the darker side
will pull its PNP transistor on sooner than the FLED on the lighter side -
making the bot 'run away' from the scary dark side.
I think it's a pretty elegant solution - you don't need any extra
components to give extra functionality! Got to be good, in my book.
I guess the best way to check it out for yourself would be to have a look
at the pictures on my site, and build one. The components are pretty
cheap, and the performance isn't that bad. You can filch a solar cell and
cap and motors from another project temporarily (that's what I did) but
I'm going to make it a permanent loan now that I see how poor the other
bot was.
Ben
9014 Mon, 10 Jan 2000 08:01:57 -0800 [alt-beam] Re: parts source "Jonathan D Rogers" > Well, that's OK because BG Micro has them for $1.75 each, no joke. The
> picture is REALLY small, though, so I can't tell if it has flat sides.
> And if anyone wants to scrutinize those BG Micro motors, just surf on
> over to www.bgmicro.com.
> All Electronics has Namiki motors, but I don't have a recent catalog from
> them so I'm not sure what they cost...
Home