Alt-BEAM Archive
Message #08665
To: beam@sgiblab.sgi.com
From: Bumper314@aol.com
Date: Wed, 29 Dec 1999 21:31:38 EST
Subject: [alt-beam] Re: tilden-class walker
In a message dated 12/29/99 5:17:36 PM Mountain Standard Time,
mikekulesza@hotmail.com writes:
> So i have those sleek LEGO gearmotors (tiny - 1cm x 1cm x 1cm, efficeint,
> high torque)that can be used to make a nice m/s bicore avec reverser
> walker... kind off like Tilden's SMT series.
>
> Now the questions:
> What should i use for the driver? to SMT transistor deliver as much
current
> as normal ones for H-Bridge?
> Does anyone have any fundamental tips and recomendations for the
> mechanics... that seems to be the hardest part - motor orientation,
balance,
>
> centre of gravity, LEGS, etc...
>
> Thanks....
I'm sure everyone would be interested in knowing where you got these and for
how much
Steve
8666 Wed, 29 Dec 1999 22:13:15 -0500 Re: FLED Photovore Bob Shannon
> Um,
>
> The FLED solar engine should not blink at all.
> Somethings wrong here.
>
> The real disadvantage of the classis FLED photovore is
> that you needed 2 solar cells. The only way the FLED
> solar engine 'knew' where the light is was by the difference
> in firing rate of the 2 solar engines.
>
> 1381 based photovores add photodiodes to detect the direction
> of the light.
>
> I beleive that I have seen a schematic for a FLED photovore
> that used a single solar cell, but added some Cds photocells
> to measure the direction of the light.
>
> Just how did you connect two FLED solar engines with a 100K
> pot to make a photovore? Was this with a single solar cell?
> Did it use other photosensors?
>
> Max Inggal wrote:
>
> > This is the same problem I had. I didn't want to wait
> > 3 weeks for my shipment of 1381s to come in. So I
> > went do to old Rat Shack and picked up a FLEDs and
> > with is a few minutes I got a FLED engine going. But
> > for a FLED photovore just make 2 solar engines and
> > combine them with a trimpot around 100k. I've tried
> > it before there shouldn't be any reason why it
> > shouldn't work now. Also FLED photovores are alot
> > less efficient but are easier to make and alot lot
> > cooler(their "eyes" blink).
> >
> > Later!!
> > __________________________________________________
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> > Talk to your friends online with Yahoo! Messenger.
> > http://messenger.yahoo.com
>
>
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