Alt-BEAM Archive

Message #05579



To: beam@sgiblab.sgi.com
From: JVernonM@aol.com
Date: Mon, 9 Aug 1999 11:25:29 EDT
Subject: [alt-beam] Re: electric shock disposable camera.


In a message dated 8/9/99 1:44:23 AM Eastern Daylight Time, Bumper314@aol.com
writes:

> there you go Jim...next aquabot? underwater light show that your neighbors
> could see?
Hhmmm... I like it! Flash defense. Flash location. Flash signaling. Sounds
like a viable bot add on.
Jim



5580 Mon, 9 Aug 1999 11:30:43 EDT [alt-beam] Re: Namiki 1701 pager motors beam@sgiblab.sgi.com JVernonM@aol.com In a message dated 8/9/99 2:54:57 AM Eastern Daylight Time,
arno.jansen@superconsult.nl writes:

> There's one
> problem: The electromotors. The Solarbotics Photopopper uses Namiki 1701's,
> which are hard to get here in Holland. So if anyone knows where to get them
> here in Holland, or what motors I could use as replacement. Please let me
> know.
Hi Arno,
Go to a local pager store and ask to buy either busted units or new
replacement motors, they should be happy to help
Jim



5581 Mon, 09 Aug 1999 09:45:47 -0600 [alt-beam] Um, Ben... (was: magbot was electric shock disposable camera.) beam@sgiblab.sgi.com "John A. deVries II" At 02:33 PM 08/09/1999 , Ben Hitchcock wrote:
>I've got some pictures of one of mine at
>http://wollongong.apana.org.au/~ben/dragon/index.html.
>
>There isn't much of a description, but the pictures should show you the
>basics behind it.

I think that your lovely creation is between a motor-driven 'bot and a
"true" magbot. Yes, a d'Arsonval movement is basically magnets that draw a
coil (which is at the end of a spring-loaded lever) between them depending
on how much current is flowing through the coil, but there are two
differences between that and Tilden's 'classical' magbot.

The first is that the magbot he had used a coil affixed to the bottom of
the robot. In this, it was the magnet that moved (at least in the most
obvious sense)... the coil moved with the entire body. So, the robot
actually does move forward whereas your dragonfly stays in the same place &
drives its wings.

Secondly, if you'll pardon my usual horrid opinion, the magbot was
(although interesting) a really crude robot. I believe the cycle was that
the magnet started somewhat in front of the coil when the solarengine (or
whatever) fired. This provided for two things -- since the magnet was
relatively heavy, the robot moved toward the coil. At the same time,
however, the magnet was attracted enough by the coil to be picked up.

Now comes the part I really don't understand -- it might be that I've got a
basic misunderstanding of the whole mechanism so it is obvious why I
wouldn't get this part. Anyhow, when the energy from the solarengine died,
the magnet fell away again. The really tricky part, however, is that the
magnet has to fall away so as to end up SOMEWHAT IN FRONT of the coil
again. In other words, if the coil just picked up the magnet & dropped it,
no forward motion would occur. It is only the ratchety effect of the
magnet having to "fall forward" that permits forward movement of the robot.


Again, your dragonfly is very nice but I don't think it quite fits the
description.


Zoz


---------------------------------------------------------------
John A. deVries II
zozzles@lanl.gov



5582 Sun, 8 Aug 1999 18:32:29 -0500 [alt-beam] Re: Die Hopfenprallplatte (was: Chloroplast mutation) "Richard Caudle"
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Hi Craig (et. al.),

I haven't yet put it in one yet, but I have an idea hatching that I would l=
ike to use it in. Oddly enough, I kicked around the idea of using a flash =
unit to fire the SMA 'Electric Pistons' (Mondotronic) I planned on using.

The Hopping Flapper is the name my daughter came up with. The concept is t=
o use one of those wind-up flapping bird toys and motorize the flapper. Wi=
th a bicore 'head' on the tail for +phototropism, and Grasshoppermorphic (H=
ey, MT can make up words, so why can't I?) legs to get it aloft. I thought=
that a flash unit would supply the current (5000mA!) that I need to fire t=
he Electric Pistons on the legs, but now I'm not too sure. It would be nea=
t to hear the flash charging and then the robot jumps and flies off! Oh we=
ll, it's a work in progress.

Richard Caudle
richard@cqc.com
Home ICQ - Frankendaddy

---------------------------------------------------------------------------=
-----

Guardians of the sacred words: Nee, Ptang, and NeeWhon! =



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>
Hi Craig (et. al.),
 

I haven't yet put it in one yet,=
but I =

have an idea hatching that I would like to use it in.  Oddly enough, I=
=

kicked around the idea of using a flash unit to fire the SMA 'Electric Pist=
ons' =

(Mondotronic) I planned on using.

 

The Hopping Flapper is the name&=
nbsp;my =

daughter came up with.  The concept is to use one of those =

wind-up flapping bird toys and motorize the flapper.  With a bico=
re =

'head' on the tail for +phototropism, and Grasshoppermorphic (Hey, =

MT can make up words, so why can't I?) legs to get it aloft. =
; I =

thought that a flash unit would supply the current (5000mA!) that I ne=
ed to =

fire the Electric Pistons on the legs, but now I'm not too sure. =
It =

would be neat to hear the flash charging and then the robot jumps and flies=
=

off!  Oh well, it's a work in progress.

 

Richard Caudle

href=3D"mailto:richard@cqc.com">richard@cqc.com
Home ICQ - =

Frankendaddy




Guardians of the sacred words: N=
ee, =

Ptang, and NeeWhon!         =

    




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