Alt-BEAM Archive

Message #12607



To: beam@sgiblab.sgi.com
From: SG sparkyg@seark.net
Date: Sat, 25 Mar 2000 14:29:06 -0600
Subject: [alt-beam] Re: 1 Amp H-bridge



one amp?
are you sure about that?
from what size battery?
thanx
-Sparky
At 11:09 AM 3/27/00 PST, you wrote:
>
>I made mysel a niceworking H-bridge from BC 639 & BC 640 transistors. Has
>this been done before? I is said to deliver 1 amp of power!
>______________________________________________________
>


12608 Mon, 27 Mar 2000 15:13:02 -0600 [alt-beam] Re: Sold Out, and a note on selling things on the list. Two sets of beam@sgiblab.sgi.com Richard Piotter I won't be using the same vertical lift system. Theirs uses parts I
can't get my hands on, so there will be some differences.

I may also build a new, unique leg system that allows both
Quadrapod/Hexapod style motion, like Lynxmotion's system, but ALSO
allows crab walking motion.


Dennison Bertram wrote:
>
> Becarefull to come up with a somewhat unique design. If you bought the kit
> from lynxmotion, and you simply just copy the design of the peices, you'll
> have some pretty mad lawyers knocking on your door.
>
> dennison
>
> --On Mon, Mar 27, 2000 1:22 PM -0600 Richard Piotter
> wrote:r
> > I agree. The list is to further BEAM, and commerce that assists BEAMers
> > in getting what they need is absolutely great! I would LOVE to see a
> > surplus company "spam" the list when new low voltage, high efficiency
> > motors are avaliable!
> >
> > I personaly am thinking of doing a Quadrapod/Hexapod style kit in
> > limited runs. It's just an idea. I'm not sure if people would buy into
> > it, but if there was interest, I'd do them!
> >
> > Only thing, is unless you can't get your own, I'd probably sell the kits
> > with out servos. If I added them, they'd just be the exact cost added.
> > Not sure if I'd even do it, but it's a thought.
> >
> >
> > Dennison Bertram wrote:
> >>
> >> For anyone who was interested, the great Omron Gearmotors have been
> >> spoken for. When I get more of them, I'll let you know.
> >>
> >> As a side comment, I want to address the issue of selling items on the
> >> BEAM list. When listing an item for sale on the list, people tend to
> >> feel guilty because in a way it's grossly capitalistic. In light of
> >> recent fears of irrelevant e-mails I would like to address the issue of
> >> selling through the beam list first. I am in support of using the list
> >> to sell various items like gearmotors, or kits and hextiles. It gives
> >> beamers a chance to transfer their resources. Its a good thing for the
> >> list, and not just because I happen to be selling either. I've purchased
> >> things from off the list that I wouldn't have been able to get
> >> otherwise. So have many other people. I know there is a 'trading post'
> >> somewhere, but it's not frequented very often, and not too many people
> >> know about it. (I don't even know the address or if it's still up).
> >> While you could reserve sales to something like the trading post the
> >> fact is, it will be overlooked. Just like the multitude of tutorials and
> >> help pages are when someone sends a "my SE doesn't work" message to the
> >> list. As it is, occasional postings wouldn't pose a problem, and are
> >> helpfull to the BEAM community. As it stands, I approve of the use of
> >> the list for people to sell small BEAM related items they have on the
> >> list. (A clear distinction about what is and is not beam related can
> >> easilly be drawn here) I think it's a good thing.
> >>
> >> Dennison
> >
> > --
> >
> >
> > Richard Piotter The Richfiles Robotics & TI web page:
> > richfile@rconnect.com http://richfiles.calc.org
> >
> > -- Make Money by Simply Surfing the Net or responding to E-Mail!!!
> > -- Click below!!!
> >
> > http://www.alladvantage.com/go.asp?refid=ATL147
> > http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630

--


Richard Piotter The Richfiles Robotics & TI web page:
richfile@rconnect.com http://richfiles.calc.org

-- Make Money by Simply Surfing the Net or responding to E-Mail!!!
-- Click below!!!

http://www.alladvantage.com/go.asp?refid=ATL147
http://www.spedia.net/cgi-bin/dir/tz.cgi?run=show_svc&fl=8&vid=329630



12609 Mon, 27 Mar 2000 16:10:43 -0800 RE: TO MUX OR XOR ,THAT IS THE QUESTION was : Reverser circuit Wilf Rigter
> Just a word of warning: despite all the bravado, the totally complete mux
> walker hasn't actually been build or tested and a thought struck me that a
> couple of diodes may be needed to make the turning circuit work as shown
in
> the attached. So who could try this out then?
>
> grin
>
> wilf
>
> <>
> > -----Original Message-----
> > From: Wilf Rigter [SMTP:Wilf.Rigter@powertech.bc.ca]
> > Sent: Sunday, March 26, 2000 12:35 PM
> > To: 'beam@sgiblab.sgi.com'
> > Subject: TO MUX OR XOR ,THAT IS THE QUESTION was : Reverser circuit
> > drawn wrong??
> >
> > The "reversed" reverser is one of many little conundrums people run into
> > when learning about these circuits.
> >
>

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