Alt-BEAM Archive
Message #09425
To: beam@sgiblab.sgi.com
From: Bumper314@aol.com
Date: Thu, 20 Jan 2000 20:25:11 EST
Subject: [alt-beam] Re: jameco
In a message dated 1/20/00 6:21:20 PM Mountain Standard Time,
dibst11+@pitt.edu writes:
> that's a big solarcell.
I think its comparable to 2 Solarbotics cells and ant half the price
Steve
9426 Thu, 20 Jan 2000 17:35:40 -0800 [alt-beam] Re: Score: BEAM Roboticist 3 - Model Railroader 0 "'beam@sgiblab.sgi.com'" Wilf Rigter Now this looks very exciting indeed!
http://www.rohm.com/products/databook/optdisc/pdf/bh6511fs.pdf
regards
wilf
> -----Original Message-----
> From: Kelly Petriew [SMTP:kelly.petriew@sask1.com]
> Sent: Wednesday, January 19, 2000 12:06 PM
> To: beam@sgiblab.sgi.com
> Subject: Score: BEAM Roboticist 3 - Model Railroader 0
>
> I was also browsing around the world to see what I could learn about
> different ICs and how they might be useful in BEAM.
9427 Thu, 20 Jan 2000 19:15:30 -0800 (PST) [alt-beam] Battery/Solar Power BEAM List Daniel Grace Solar Panels are a little expensive for experimenting,
and I'm sure someone agrees with me out there, and has
experiance in what I am looking for.
How can you hook your bot up to batteries and have the
batteries accurately mimic solar panels? Besides
voltage, that is. Is all you need a current limiting
resistor, and maybe a voltage divider? What about
less-than-perfect light conditions? Does the voltage
or current go down? Or both? By this I mean max
voltage and current, I know that drop in voltage
across something means drop in current, and vica
versa, but if I understand right, there is a maximum
of each you can pull from each solar panel.
So in short, with a voltage divider (if needed) and a
current limiting resistor, does that ensure that a bot
running off of batteries will run off of a solar
panel, or is there more involved?
~Daniel
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9428 Thu, 20 Jan 2000 20:31:44 -0800 [alt-beam] Incredible gear motors "adam-m" Do these specifications sound interesting?
Gear motor:
1cm x 1cm x 1.3cm
2-9v
8mA draw!!! (no load)
32 rpm
surprisingly tourquy
15 grams - VERY light
They could even be smaller, because they are surrounded by a plastic case
that i have not cracked open yet. The source? LEGO. These are the micro
gearmotors for the mindstorms sets. I believe the cost is $17 CAD each. A
friend of mine bought $4000 worth of mindstorms gear and was showing me some
of his creations. When i saw these motors i practically freaked.
Absolutely perfect for heads, and 2DOF heads - because they are so light.
With their low current draw, micro walkers are a possibility. I'm going to
order some and try them out. Never seen gearmotor specs so promising.
You can order them direct from LEGO. www.lego.com
Nowhere near as powerful as a BG mirco, but so much smaller, lighter, and
less draw.
I think a micro walker would be a very interesting project....
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