Alt-BEAM Archive
Message #13731
To: beam@sgiblab.sgi.com
From: beam@sgiblab.sgi.com
Date: Thu, 20 Apr 2000 06:44:21 EDT
Subject: Re: efficient launcher?
What about the Lego pneumatics? They run on pressure pumped by you and
stored in one tank or more. To pump it, someone could add a small air pump.
Rusty
13732 Thu, 20 Apr 2000 22:11:49 +1000 Re: Photopopper answers from Ben beam@sgiblab.sgi.com "Ben Hitchcock" Hmmm...
Which schematic are you looking at? I went by the one at Chiu's site
(http://www.geocities.com/SouthBeach/6897/photovore.html).
It doesn't show touch sensors, so I just made up what I thought would work.
No guarantees though :-)
Ben
----------
>From: Ken Hill
>To: beam@corp.sgi.com
>Subject: Re: Photopopper answers from Ben
>Date: Thu, 20 Apr 2000 15:43
>
> Thanks Ben! Making much more sense now!
>
> [snip]
>
> >> (Photopopper drawing shows the wires crossing near 1381s but not sure if
> >> they are connected at that junction).
>
> After further study, I'm thinking that junction must be connected or the
> PDs wouldn't have any effect on the 1381 (am I right?)
>
> >>
> >> And lastly, is the RC timer (if that's what it is?) used to keep the motor
> >> from firing for a while assuring the turn or what?
>
> >Eh? RC networks? Where? The cap on the trigger of the 1381 is there to
> >allow different resistances of light sensor to have some effect... This is
> >an RC network I guess, but only if you replace the Photodiode with a LDR.
> >Is this what you're talking about? If so then yes the RC time constant is
> >affected by light, therefore the popper will be affected by light and will
> >either turn away or come towards the light.
>
> [snip]
>
> Oh...I saw the .22 cap and 680k resistor to ground on the feeler switch and
> thought it was an R/C timeout for the turn action of the switch like other
> bots I've seen have. I'm learning :)
>
> Thanks again; Ken
>
13733 Thu, 20 Apr 2000 08:42:47 -0700 Re: efficient launcher? beam@sgiblab.sgi.com owner-beam@sgiblab.sgi.com [mailto:owner-beam@sgiblab.sgi.com]On
In a message dated 4/20/00 12:24:03 AM Eastern Daylight Time,
cage@midway.uchicago.edu writes:
> but it maybe could be used as an emergency escape mechanism
> or weapon by a bot. Sort of along the same lines as insects employ
> chemical defense weapons.
"You'll shoot your eye out!" :) You know, this topic is really popular. It
may make yet another good contest for future BEAM games. Could replace the
rope climbing event that seems to have been dropped. Sounds like a blast to
watch anyway :). How about a bot that has to approach a wall two feet high,
surmount it and cross a finish line on the other side. Maybe a timed event?
See ya,
Jim
http://www.geocities.com/SoHo/Exhibit/8281/beamart.html
ICQ# 55657870
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