Alt-BEAM Archive
Message #05705
To: beam@sgiblab.sgi.com
From: Chiu-Yuan Fang chiumanfu@home.com
Date: Fri, 13 Aug 1999 15:29:58 -0700
Subject: [alt-beam] Re: Contest entry
Nice bot Ian. Although it has absolutely nothing to do with the contest goals,
I'll accept it as a legitimate entry. ;)
How is LANL going?
Chiu
Ian Bernstein wrote:
>
> Hi all,
>
> Check out my contest entry at....
> http://beam-online.com/chiucontest899/
>
> and tell me what you think. It's the first "useful" robot in my
> collection. What it does is goes around my room at night and cleans the
> floor!
>
> Laterz
>
> *-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-*
> Ian Bernstein "aka - Synet" The Master Builder
>
> E-Mail - Ian@beam-online.com
> BEAM Online - http://www.beam-online.com
> Quote - "Those parts of the system that you can hit with a hammer
>
> are called hardware; those program instructions that you
> can
> only curse at are called software."
> - Levitating Trains and Kamikaze Genes
> Technological
> Literacy for the 1990's
--
Chiu-Yuan Fang
chiumanfu@home.com
ICQ=5614919
http://www.geocities.com/SouthBeach/6897/beam2.html
5706 Fri, 13 Aug 1999 17:51:31 -0500 [alt-beam] Re: QUESTION "jclark76" > -----Original Message-----
> From: owner-beam@sgiblab.sgi.com [mailto:owner-beam@sgiblab.sgi.com]On
> Behalf Of brit Daryl
> Sent: Friday, August 13, 1999 10:23 AM
> To: beam@sgiblab.sgi.com
> Subject: QUESTION
>
>
> Hello would anybody know of any sites that has a lot of robot
> schematics intstructions of both beam robots or more advanced robots ????
try http://members.aol.com/c40179/index.html
5707 Fri, 13 Aug 1999 17:48:06 -0600 [alt-beam] Re: 245 reverser beam@sgiblab.sgi.com Richard Piotter The circuit should do. I just need to know if a single chip will run BG
Micro motors if the two reversers on teh chip are just placed in paralell.
I'll be using one 245 per motor (unless it becomes necessary to stack them).
Do you know how Cricket or the 3 motor lynxmotion hexapod move... same
mechanics. it's the two motors that move each of the side legs that
reverse. I don't think I need the middle (lift) motor to reverse, but
I'll include the wiring for it just incase.
Each side motor reverses in order to achieve a turning gait. If both
reverse, then the bot backs up. That's the basics. I just want to know
if rather than stacking, I can just tie both motor outputs and microcore
inputs together instead.
Wilf Rigter wrote:
>
> Hi Richard,
>
> Don't forget that this is meant to be an effective solution only
> under certain circumstances ie if you only have 245s. For example for
> independently reversing 2 branched Bicores I would use one 74HC86. There are
> lot's of solutions looking for problems. If you can precisely describe the
> problem (ie This is what I am using now, I would like to do the same thing
> using the same parts (don't tell me to use a PIC or something) but I would
> like to do it using half the parts or do twice as much with the existing
> parts), no doubt we would find the best solution for that problem. To put
> it another way, unless there are compelling reasons, you don't want to have
> to start from scratch, and like to continue along the same learning curve.
>
> >Ah, but this is a stand alone reverser that will do two motors, and
> can
> >be used with a microcore... I think.
>
> Yes, yes, yes
>
> >Will the 245 drive BG Micro motors, or do i need to stack
>
> One 74AC245 or two 74HC245s
>
> >Do both motors reverse???
>
> No only M1 reverses, M2 does not but G controls both during PNC
> active high.
>
> >I'll have to have at least 2 motors able to reverse, but they have
> to work separately.
>
> If you use h-bridge outputs then use two HC245s : PNC disable for 2
> h-bridges and for reversing one h-bridge and one motors.
>
> Only one direction control so up to 4 "simultaneous" output
> reversals (but not separate independently controlled reversals)
>
> >I've actualy NEVER built a 245 motor driver, though I have used 2
> or 3 arrangements of >H-Bridges and a darlington controled switch.
>
> The 245 is really used as a mux not a controlled invert/noninvert
> function. Since most applications of the "reverser" effectively swap sets of
> 2 complementary inputs and 2 complimentary outputs, the application of a
> mux or a controlled inverter has the same results.
>
> regards
>
> Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> tel: (604)590-7493
> fax: (604)590-3411
>
> > -----Original Message-----
> > From: Richard Piotter [SMTP:richfile@rconnect.com]
> > Sent: Thursday, August 12, 1999 9:14 PM
> > To: beam@sgiblab.sgi.com
> > Subject: 245 reverser
> >
> >
--
Richard Piotter
richfile@rconnect.com
The Richfiles Robotics & TI web page:
http://richfiles.calc.org
For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html
5708 Fri, 13 Aug 1999 18:04:41 -0600 [alt-beam] Re: Contest entry beam@sgiblab.sgi.com Richard Piotter I wish I had finished Spyder for the contest. new pictures I found show
that this and tilden's Spyder are VERY different. This one also would
walk in a completely different fashion. I wish I would have finished so
I could have entered it! Theoreticly, I could have it walking within a
week, but I doubt I could implement turning. I also was working on
Hexapod. Oh well. Maybe I can rush and finish it at least for the
meeting this Thursday.
--
Richard Piotter
richfile@rconnect.com
The Richfiles Robotics & TI web page:
http://richfiles.calc.org
For the BEAM Robotics list:
BEAM Robotics Tek FAQ
http://people.ne.mediaone.net/bushbo/beam/FAQ.html
5709 Fri, 13 Aug 1999 21:29:19 -0300 [alt-beam] magbot alt-beam@egroups.com michael.hirtle@ns.sympatico.ca (Michael Hirtle) hello list i am sorry to bother u but i have a few questions that needs answering
well here it is, i want to make a mabot (not the mobile kind it will be like the
like the sundancer butterfly without wings)
and i want to make it able to junp 6" into the air and then come back down i think
i can do this by useing three 4700 but if this will not work could u suggest
another cap but i want to have 3 of them because i want it to look like a symet.
(this one's for you Dave) Will the coil at solarbotics hold up to the three 4700
caps with out damaging it?
Witch(sp) voltage triger (the ones at solarbotics) would u recomend I use to
unleash the full fury of the cap on "major henry" (the solarbotics coil)?
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