Alt-BEAM Archive
Message #06638
To: beam@sgiblab.sgi.com
From: "Chris" 123abc@chek.com
Date: Mon, 11 Oct 1999 13:24:58 -0400
Subject: [alt-beam] Aquabots
One thing I have noticed as far as aquabots go is the lack of a swim bladder. Fish (and submarines) use this to change their depth. Suck water in to go down. push water out to go up. I don't know how this would be done, but I hope that will help anyone trying to make an aquabot.
Win a LAPTOP Computer and get your FREE E-mail Account at http://mail.chek.com
6639 Mon, 11 Oct 1999 11:53:19 PDT [alt-beam] Re: Aquabots alt-beam@egroups.com "Patrick Yeon"
>From: "Chris" <123abc@chek.com>
>Reply-To: alt-beam@egroups.com
>To: beam@sgiblab.sgi.com
>Subject: [alt-beam] Aquabots
>Date: Mon, 11 Oct 1999 13:24:58 -0400
>
>One thing I have noticed as far as aquabots go is the lack of a swim
>bladder. Fish (and submarines) use this to change their depth. Suck water
>in to go down. push water out to go up. I don't know how this would be
>done, but I hope that will help anyone trying to make an aquabot.
>
A submarine works like so, Chris:
It has two chambers per side, one full with compressed air (inside) and the
other one with normal pressure air (outside). The outside one has doors in
beetween the chamber and the water outside. The inside one has a two-way air
pump in beetween two doors (one on the outside chamber, one on the inside).
To dive, it lets the air out into the water while sea-water comes in. To
surface, it lets out compressed air from the inside chamber to the outside
one which pushes the sea-water out back into the sea. This requires lots of
space and compressed air. To use this in BEAM you will need a fairly large
robot and a modified surface-dive system. My sugestion is like so:
Use the submarine system EXCEPT when you need to dive just suck your air
from the outside chamber back in to the inside chamber while bringing water
into the outside chamber. With a little experimentation, you can find
different different air-water combinations for different depths.
sorry this letter was soooooo long, but I gave you the short version...
Pat Yeon
P.S. to avoid problems, put your holes on the underside of your aquabot.
______________________________________________________
6640 Mon, 11 Oct 1999 11:51:51 -0700 (PDT) [alt-beam] how exactly does a bicore work? beam@sgiblab.sgi.com Evan Dudzik i am just wondering, with a phototropic (head) bicore,
does the motor go both ways, just different distances
each way, or does it just go whichever way has the
most light? i have been into BEAM for like 1 or 2
years, but i have not done anything with the bicore
yet... i am trying to get into doing bicore stuff. oh
well. maybe i will make one. anyway...
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6641 Mon, 11 Oct 1999 14:57:57 -0400 RE: power_smart_head fest(please take me off the list} onald Burn
>
> (please take me off the list}(please take me off the list}(please take me
> off the list}(please take me off the list}(please take me off the
> list}(please take me off the list}(please take me off the list}(please
take
> me off the list}(please take me off the list}(please take me off the
> list}(please take me off the list}(please take me off the list}(please
take
> me off the list}(please take me off the list}(please take me off the
> list}(please take me off the list}(please take me off the list}(please
take
> me off the list}(please take me off the list}(please take me off the
> list}(please take me off the list}(please take me off the list}(please
take
> me off the list}(please take me off the list}(please take me off the
> list}(please take me off the list}(please take me off the list}(please
take
> me off the list}(please take me off the list}
>
> >From: Wilf Rigter
> >Reply-To: beam@sgiblab.sgi.com
> >To: "'beam@sgiblab.sgi.com'"
> >Subject: RE: power_smart_head fest
> >Date: Fri, 10 Sep 1999 18:12:07 -0700
> >
> >Hello Scott,
> >
> >Tell us more: what components? which schematic? what motor? matched LDRs?
> >
> >best regards
> >
> > Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
> >
> >
> > > -----Original Message-----
> > > From: Scott Burns [SMTP:s-burns@uiuc.edu]
> > > Sent: Friday, September 10, 1999 7:05 AM
> > > To: beam@sgiblab.sgi.com
> > > Subject: Re: power_smart_head fest
> > >
> > > Dear Wilf:
> > >
> > > The virtual beam workshop sounds great. I tried building the PSH and
was
> > > able to get the square waves to the motor to change duty cycle with
> > > changes
> > > in relative LDR illumination, but they were always in phase. The motor
> > > never saw a voltage differential across it. I'm anxious to figure out
> >what
> > >
> > > I did wrong.
> > >
> > > Regards, Scott
> > >
> > >
>
> ______________________________________________________
>
6642 Mon, 11 Oct 1999 16:05:11 EDT [alt-beam] Re: Any BEAMers in South Florida? beam@sgiblab.sgi.com OoviRoO@aol.com I live in South Florida in West Palm Beach. My name is also Rick. But i am
not as old as you. I am only 16.
6643 Mon, 11 Oct 1999 13:08:51 -0700 (PDT) [alt-beam] Re: more info (was: how exactly does a bicore work?) beam@sgiblab.sgi.com Evan Dudzik ok, more info: it is doing impossible things... i
hooked up two LEDS in opposite directions instead of
the motor, and all they do is glow. i added a few
resistors in series with the photodiodes so the
blinking would slow down (too fast to see, looks like
a steady glow) and it blinked both LED's on and off
TOGETHER.. how can electricity flow both ways at once?
they were in opposite directions! (anode+cathode
reversed, etc.) i have no idea how this thing should
work, i took out a photodiode and it blinked slower,
but they were still both going at once. i am really
comfused. can anyone help me?
--- Evan Dudzik wrote:
> i am just wondering, with a phototropic (head)
> bicore,
> does the motor go both ways, just different
> distances
> each way, or does it just go whichever way has the
> most light? i have been into BEAM for like 1 or 2
> years, but i have not done anything with the bicore
> yet... i am trying to get into doing bicore stuff.
> oh
> well. maybe i will make one. anyway...
>
>
> =====
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>
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> __________________________________________________
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> Bid and sell for free at http://auctions.yahoo.com
>
__________________________________________________
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6644 Mon, 11 Oct 1999 17:09:11 -0700 [alt-beam] Re: Any BEAMers in South Florida? "Rik" COOL -- you got a website with your bots posted?
how long have you been into this?
well as far as the age goes...i might be 31 .. but i look and act 18! hahah
(not kidding)
im totally new to this beam stuff ... and im also teaching myself
electronics.....
i live in deerfield ... if ya dont know where that is ... it's just after
delray and boca..so im just south of you 1/2hour or so!
Hey.. WXEL the palmbeach pbs is showing a robotics show tues. @ 8:00 and
they are going to be talking to Mark Tilden ..and showing some BEAM stuff!!
... if you cant find it on your cable..you can go to ch.42 on the uhf.
what bots have you built.....i wanna see some live ones!!!
if i can get the other guys i been bothering to get into to this off their
asses..maybe we can all get together!
-Rik
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