Alt-BEAM Archive

Message #08251



To: beam@sgiblab.sgi.com
From: "Travis D." beam_bot@yahoo.com
Date: Mon, 13 Dec 1999 19:24:46 -0800 (PST)
Subject: [alt-beam] Re: Batteries


What about incorporating another set of
photodiodes/photoresistors in the front and rear of
the bot so that when the photodiodes on the N/S axis
are equal and the E/W axis are equal (eg. the bot
being under the brightest light source), then charging
batteries....anybody happen to have a schematic?

--- Timothy Flytcher wrote:
> Hold up a minute Jim, are we talking about replacing
> the cap with a nicad
> cell *or* charging the cell with the solar panel
> then the Ni-cad battery
> charging a cap to run the engine???
>
> >The Solar Engine would always be "open", depending
> on the 1381 voltage
> >trigger level, and the number of cells. It
> probably wouldn't even trigger
> >on one cell. This could however be a good thing.
> I think the 1381's go up
> >to like 4 volts. Would be interesting to see the
> effects of a SE or even a
> >chrloroplast. Adjusting the triggering voltage
> could be controlled by
> >lighting conditions, running more off the battery
> in the dark, and just
> >soaking in the rays in the higher light.
> Essentially charging the
> >batterys.
> >The delema is then how to adjust the triggering
> voltage. It would seem
> >almost impossible with a 1381, and I haven't looked
> to much at a
> >cholorplast. (maby a good exuse to try one)
> >
> >
> >
> >
> >James Taylor
> >URL: http://fly.to/springmeadows
> >
> >----- Original Message -----
> >From: Timothy Flytcher
> >To:
> >Sent: Monday, December 13, 1999 4:28 PM
> >Subject: Re: Batteries
> >
> >
> > > I like the Ni-cad 9v remove the case and I get
> seven neat little cells
> >about
> > > 2/3 of an N cell... I have found these to be
> very reliable and true to
> >the
> > > claimed capacitance... I have used these in my
> hand launched R/C gliders
> >for
> > > the last 12 years... voltage is not a problem as
> you can make up
> >whatever
> > > you want for cell count (1.2v/cell) ... I have
> not yet tried the Hydried
> > > cell yet but would like to :) maybe next
> summer???...
> > >
> > > Dumb question??? what happens if I replace the
> cap in a solar engine
> >with
> >a
> > > small Ni-cad cell??? I have wanted to try this
> but have yet to sacrifice
> >one
> > > of my packs...
> > >
> > >
> > > >I wanted to poll everyone and see what you use
> when you need batteries
> >in
> > > >an
> > > >application. I've grown quite tired of AA's
> because of their size, but
> >I
> > > >can't seem to find any that last as long and
> are as cheap to replace.
> > > >
> > > >I've been looking at the smaller Lithium photo
> cells, but they're too
> > > >expensive to not be rechargeable. And I
> *would* use a normal 9V, but
> > > >that's
> > > >overkill on the voltage side of things. I'm
> looking for a small but
> > > >long-lasting 6V source.
> > > >
> > > >Any ideas?
> > > >
> > > >
> > > >have fun,
> > > >
> > > >phillip
> > > >
> > >
> > >
>
______________________________________________________
> > > Get Your Private, Free Email at
> http://www.hotmail.com
> > >
> >
>
>
______________________________________________________
>


8252 Tue, 14 Dec 1999 15:14:49 +1100 [alt-beam] Re: BEAMjet beam@sgiblab.sgi.com Elmo If your interested.....

http://robotics.jpl.nasa.gov/tasks/aerobot/homepage.html


Elmo





Dennison Bertram wrote:
>
> Oh, I didn't mean my response to sound so harsh. I wasn't criticising you in
> anyway, infact I'm alot like you. Shoot, if I come up with a good idea, I'm
> the first to say so. :-) Anyway, don't worry about it.
>
> dennison
>
> -----Original Message-----
> From: owner-beam@sgiblab.sgi.com [mailto:owner-beam@sgiblab.sgi.com]On
> Behalf Of Justin
> Sent: Monday, December 13, 1999 12:36 PM
> To: beam@corp.sgi.com
> Subject: Re: BEAMjet
>
> [Quoting from different posts]
>
> >It's a curious thing to note however, that the BEAMERs on this list
> >have already come up with a fair amount of stuff. The whole blimp idea
> isn't
> >exactly new.
>
> I didn't mean vague concepts of means and motion, unformed ideas (eg
> blimps, jets) etc, but the more detailed description of mounting an SE
> on an arm, making that arm into a mobile, putting a propellor on the SE
> such that it imitates flight when triggered, and dressing the whole
> thing up as a Fokker . That's specific enough to be a
> reasonably distinctive description. If he was talking about dressing it
> up as a bird that flaps its wings when triggered, despite being almost
> the same idea, it wouldn't be construed as the source of my design. But
> yes - that someone thought of something so similar indicates it may be a
> more obvious concept than I took it for. Either that or BEAM attracts
> people who think very much like me. Me for example... :-)
>
> >Ideas are good. Ideas start the process. But, a finished, beautiful
> >prototype is the real meat and potatoes.
>
> I agree. Ideas are almost worthless when you always have at least ten
> great ideas in the space of time it takes to bring just one of them into
> the world. For this reason, there is little incentive to act on someone
> else's ideas while your own accumulate dust. Thus continuously acting
> only on other peoples ideas is often symptomatic of either lack of
> creativity or low self esteem (or that you're employed :). So when I
> post to say "yeah - I also thought of that", I'm not saying "Heap glory
> upon my manly form for my ideas are as gifts from god", I'm checking
> possible misrepresentation of how I usually build things. It's not a big
> thing, but it's nicer to have it correct rather than mistaken :-)

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