Alt-BEAM Archive
Message #09098
To: beam@sgiblab.sgi.com
From: jester96beam@iname.com
Date: Wed, 12 Jan 2000 09:48:59 -0500 (EST)
Subject: [alt-beam] Re: Photovore Performance?
Yes, that's about right for a typical photovore, but mine tend to pop about twice ever second under noon sun light, but you'rs moves farther by the sound of it.
Chris
---- you wrote:
> What performance, in terms of time to charge and popping distance, could
> one expect from a typical solar powered photovore?
>
> I have just built my first photovore utilizing a 1381SE, 3766 solar
> cell, and two pager motors from Solarbotics. It takes about 20s on my
> workbench to charge and it moves about an inch per pop. In direct noon
> sunlight, it fires about every 2 seconds. Is this typical?
>
> Roy
>
>
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9099 Wed, 12 Jan 2000 06:47:49 -0800 Re: pancake motors Jonathan D Rogers
> OK, let me make sure we're on the same page with the pancake motors here.
> I'm looking at the guts of a 5 1/4" drive right now, and I see two motors
> of interest-one of them is pretty big, and it essentially a big flat
> magnet mounted on a circuit board with driver circuitry and a bunch of
> coils under the magnet.
> Now, there's also another, smaller DC motor that is still quite flat, but
> somewhat smaller, and not on a circuit board. It's got 5 wires, so it
> must be a stepper.
> So, which one of these are you referring to?
> I have also seen "board motors" like this in the many VCRs I've taken
> apart.
> And they're in all drives, basically, just in different sizes.
> It seems to me that since there's drivers for the board motor on the
> board, how hard could it be to run the thing?
>
> jonathan
>
> p.s. why is everyone whining about driving stepper motors? wouldn't it be
> simple to interface to a microcore, bicore, etc. on the TTL level to a
> stepper driver circuit?
>
>
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