Alt-BEAM Archive

Message #09445



To: beam@sgiblab.sgi.com
From: Dave Hrynkiw dave@solarbotics.com
Date: Fri, 21 Jan 2000 13:32:45 -0700
Subject: [alt-beam] Re: BEAM Robotics Games


At 05:03 AM 1/21/00 , Geoff Waters wrote:
>Does anyone know if The International BEAM Games will ever be held in
>South Africa?

I can't say that there's any immediate plans to do so. I think Mark has had
another offer from India again in 2001 after our event here in Calgary.

-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



9446 Fri, 21 Jan 2000 15:22:12 -0600 [alt-beam] Re: powersmart head beam@sgiblab.sgi.com Brad Guillot Elmo Wrote:
>
> Sparky managed to get the original circuit from Darrell Johnson going.
>
I got It working pretty good, but i haven't tested it on solar power...
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9447 Fri, 21 Jan 2000 13:29:29 -0800 [alt-beam] Re: Score: BEAM Roboticist 3 - Model Railroader 0 "'beam@sgiblab.sgi.com'" Wilf Rigter H-bridge circuits usually have two direction and one external PWM inputs per
bridge. The BH6511 requires direct modulation of the direction lines for
PWM. If you don't want to use the PWM feature on the BH6511 then the two
direction control signals of each bridge are simply turned on or off (ie no
modulation) for the STOP, BRAKE, FORWARD and REVERSE functions.

The Vg voltage can be supplied externally or just connect a small cap to
that pin and use the internal charge pump to generate the Vg (to 2xVm) for
the pre-drive section.

Too bad about the SMT package is right but I would still use it if I got one
for free.

regards

wilf
> -----Original Message-----
> From: Sathe Dilip [SMTP:sathe_dilip@bah.com]
> Sent: Friday, January 21, 2000 8:24 AM
> To: beam@sgiblab.sgi.com
> Subject: Re: Score: BEAM Roboticist 3 - Model Railroader 0
>
> The IC seems OK if one just wants to use the H bridges. Though the
> description says PWM, for PWM, you still need external PWM control. The
> charge pump could be useful but it is not clear what kind of current it
> can supply (it is also not clear if Vg is internally connected to the
> predrive for supply). Too bad the package is a 32 pin surface mount.
>
> Dilip
> ------------------------------------------
> Wilf Rigter wrote:
> >
> > Now this looks very exciting indeed!
> >
> > http://www.rohm.com/products/databook/optdisc/pdf/bh6511fs.pdf
> >
> SNIP
> ------------------------------------------------------------
> When everything's coming your way, you're in the wrong lane.
> ------------------------------------------------------------



9448 Fri, 21 Jan 2000 13:52:50 -0800 (PST) [alt-beam] Re: SV: Battery/Solar Power beam@sgiblab.sgi.com Daniel Grace I was going to breadboard it, but with batteries. I'm
unsure of why right now, I'm worn out after school. I
had a good reason, I'm sure of it! Is there conditions
to watch besides current draw and voltage? I read at
school today that power supply voltages _drop_ as more
current is drawn. I don't understand this, as it seems
backwards, but are solar cells the same? The book was
talking about AC->DC power supplies, but it could
apply to solar cells too, I've never messed with them.

~Daniel

--- Thomas Pilgaard wrote:
> Why not just breadboard it?
>
> > Solar Panels are a little expensive for
> experimenting,
> > and I'm sure someone agrees with me out there, and
> has
> > experiance in what I am looking for. [snip]
>
> Cheers,
>
> Thomas
>

=====
ICQ # 39402143
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9449 Fri, 21 Jan 2000 13:53:13 -0800 (PST) [alt-beam] Re: SV: Battery/Solar Power beam@sgiblab.sgi.com Daniel Grace I was going to breadboard it, but with batteries. I'm
unsure of why right now, I'm worn out after school. I
had a good reason, I'm sure of it! Is there conditions
to watch besides current draw and voltage? I read at
school today that power supply voltages _drop_ as more
current is drawn. I don't understand this, as it seems
backwards, but are solar cells the same? The book was
talking about AC->DC power supplies, but it could
apply to solar cells too, I've never messed with them.

~Daniel

--- Thomas Pilgaard wrote:
> Why not just breadboard it?


=====
ICQ # 39402143
__________________________________________________
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Talk to your friends online with Yahoo! Messenger.
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9450 Fri, 21 Jan 2000 21:55:51 GMT [alt-beam] Re: Incredible gear motors beam@sgiblab.sgi.com "Mike Kulesza"
LEGO Micromotors are real slick. I have 2 and going to make a walker. There
are several BEAM bots already that use those.
______________________________________________________



9451 Fri, 21 Jan 2000 22:56:27 +0100 [alt-beam] 7 th Festival des Sciences et Technologies robotik@robotik.org robotik@robotik.org Communiqu=E9 20 janvier 2000 :

Bienvenu =E0 Vierzon :
Ca y est ! les dates et le lieu sont confirm=E9s pour le 7 th Festival
International des Sciences et Technologies, nous nous retrouverons du
23 et 28 Mai 2000 =E0 Vierzon.
Situ=E9 entre Orl=E9ans et Bourges, la ville de Vierzon nous accueillera
dans un pavillon magnifique de 3600 m=B2. Une surface qui va permettre de
construire plusieurs pistes et d=92avoir plusieurs comp=E9titions
simultan=E9es.
Comp=E9titions :
Le nouveau r=E8glement est en ligne =E0 l=92adresse ;
=ABhttp://www.robotik.org/contest/rulfr.htm =AB vous pouvez =E9galeme=
nt
consulter la piste de votre cat=E9gorie =E0 l=92adresse ; =AB http://w=
ww.
robotik.org/contest/Pistvers3m.jpg &
http://www.robotik.org/contest/Pistvers3l.jpg =AB .
Inscriptions :
Pour les =E9quipes qui n=92ont pas encore rempli leur bulletin d=92inscri=
ption
il grand de le faire , vous pouvez le faire =E0 l=92adresse =AB
http://www.robotik.org/logistic/inscription.htm =AB . Si vous ne
connaissez pas encore tous les membres de votre =E9quipe vous pouvez vous
contenter de ne donner que celui du chef d=92=E9quipe.
Kits monotype ;
Vous pouvez commander la plate-forme monotype qui comprend le ch=E2ssis e=
t
les roues ainsi que les deux moteurs =AB
www.robotik.org/products/products.htm =AB
Classe d=E9monstration :
Tous les projets sont accept=E9s sous conditions d=92envoyer le projet au
jury de s=E9lection avec description du robot et de ses =E9volutions
pr=E9vues.
Site robotik.org :
Vous pouvez si vous souhaitez h=E9berger une page de pr=E9sentation sur l=
e
site , =E9cole, projet pour la comp=E9tition, =E9tudes =85=85Une page par=
=E9cole et
par =E9quipe, avec le lien possible vers votre site.
Voil=E0 n=92oubliez pas de suivre les nouvelles sur robotik.org et merci =
de
vos mails et de vos commentaires.

L=92=E9quipe d=92organisation

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Official statement January 19 2000:
Welcome in Vierzon!
Is there! the dates and the place are confirmed for 7 th International
Festival of Sciences and Technologies, we will meet ourselves of the 23
and 28 Mai 2000 in Vierzon. Located between Orleans and Bourges, the
town of Vierzon will accomodate us in a splendid hall of 3600 m=B2. A
surface which will make it possible to build several tracks and to have
several simultaneous competitions.

Competitions:
The new rule is on line with the address; "
http://www.robotik.org/contest/ruluk.htm " you can also consult the
track of your category to the address; "http://www
robotik.org/contest/Pistvers3m.jpg &
www.robotik.org/contest/Pistvers3l.jpg ".
Inscriptions:
For the teams which did not fill their large bulletin with inscription
yet it to do it, you can do it with the address "
http://www.robotik.org/logistic/inscription.htm". If you do not know yet
all the members of your team you can be satisfied to give only that of
the head of team.
Kits monotype;
You can buy the platform monotype which includes the base , the
wheels and the two engines "
http://www.robotik.org/products/products.htm"
Classify demonstration:
All the projects are accepted under conditions of sending the project
to the jury of selection with description of the robot and its
evolutions envisaged.
Site www.robotik.org:
You can if you wish to lodge a page of presentation on the site, school,
project for the competition, studies...... a page by school and team,
with the possible link towards your site.
Here do not forget to follow the news on =93 http://www.robotik.org/=93 =
and
thank you of your mails and your comments.

The team of organisation
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