Alt-BEAM Archive
Message #08127
To: beam@corp.sgi.com
From: Justin jaf60@student.canterbury.ac.nz
Date: Sun, 05 Dec 1999 22:04:06 +1300
Subject: [alt-beam] Re: solar walker
>Is there another method to go about solarizing my walker with the given
>conditions without using the PM1 solar engine? (because it uses a 1381!!!...
>no point ordering just 1 or 2 1381s...
The URL below if for a solarized bicore photovore that uses inverters
(in this case unused ones on the HC240) for the SE, which sounds like
exactly what you're after. The SE (which was ripped from the Alf
circuit) is connected to the enable pin for the other inverters on the
HC240 (ie the bicores), thus switching them on when the cap is charged,
(and off again at about 1.5V, saving lots of power :)
As I assume your walker will be using more than two bicores, you could
put the SE on its own HC04 and connect it to both enable pins on the
HC240(s?).
Bicore photovore:
http://www.geocities.com/SoHo/Lofts/1121/beam/bivore.htm
(I'm still (occasionally) working on the body for this thing, so AFAIK
the circuit still hasn't been trialed beyond the breadboard stage, but
the SE certainly works very well)
8128 Sun, 05 Dec 1999 13:40:57 +0100 [alt-beam] What's wrong ? beam@sgiblab.sgi.com Guillem Barnolas
I once read here that Mabuchi motors are the worst ones (at least, I
think that was what I read), but I've found one in BGMicro that seems
quite Ok, and I don't see the bad things... It's Mabuchi RF-370C, 3-12V
Nominal 12V. 5600 RPM @ 25mA, torque 24g/cm. 1-3/16" X 15/16" $1.49 ea
or 10/$9.95. It's VERY cheap and 25mA seems very good. Maybe they've
measured this with 12V and with 3V it consumes a lot more, but...
Greetings, Guillem.
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