Alt-BEAM Archive
Message #13637
To: beam@sgiblab.sgi.com
From: turtletek@aol.com
Date: Tue, 18 Apr 2000 17:03:13 EDT
Subject: Re: Best wheels?
In a message dated 4/18/00 3:56:03 PM Central Daylight Time, gabe@mediax.com
writes:
> just lop
> the eraser off a couple of pencils, bore a little hole in the center, a
> little glue, and presto
I've had some very different results. When given pencil eraser wheels, my
poppers barely move. They simply do not have enough torque. However, I
usually use the J flavor of the 1381. That's 2.4 V...I believe. If I used
something that triggered at a higher voltage, it would probably work better.
-Brien the TurtleTek
13638 Tue, 18 Apr 2000 16:56:14 +1000 Re: [alt-beam] RE:solarbotics solar panels? Daniel Cotter >It does provide more voltage but it has less current. The power of the
>small one in 3.5V*0.006mA=0.021W while the bigger one has less voltage but
>a high current giving a power of 2.7*0.016=0.0432W, which is more than
>twice the power of the smaller one. So the larger one is better because it
>still has enough voltage to run motors and it will allow the storage
>capacitor of a solar engine to charge the fastest, right?
>
>-----Original Message-----
>From: Joe Tochka [SMTP:eyor@beld.net]
>Sent: Tuesday, 18 April 2000 0:03
>To: alt-beam@egroups.com
>Subject: [alt-beam] solarbotics solar panels?
>
>Here is solarbotics' description of the SC2433 solarcell:
>"
>Solar Cell - SC2433 24x33mm Competition-grade Sunceram Solarcells producing
>2.7 volts (open circuit) @ 16mA (short circuit)2.7 volts in noon sunlight.
>Perfect for you ambitious Solaroller racers who want that extra edge in the
>competition!
>"
>and here is the description of the sc2422:
>"
>Solar Cell - SC2422 24x22mm Standard Sunceram Solarcells producing 3.5
>volts (open circuit) @ 6mA (short circuit) in noon sunlight.
>"
>
>Does the latter actually produce more voltage than the larger, first one?
>because the second one is smaller and cheaper, but it says it produces .7
>more volts.
>
>Also, (no offense dave), does anyone know of anywhere else that I can buy
>solarpanels from??
>Thankyou very much.
>
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13639 Wed, 19 Apr 2000 00:29:56 +0200 (MET DST) Re: Best wheels? beam@sgiblab.sgi.com Thomas Pilgaard Nielsen Have a look at Solarbotics - they've got some neat wheels that'll fit
right on a pager.
- Thomas
On Tue, 18 Apr 2000, Gabriel DeVault wrote:
> I've been experimenting with various wheels for my litle pager motor photopopper. I finally found some that work GREAT... just lop
> the eraser off a couple of pencils, bore a little hole in the center, a little glue, and presto :) Also gives my little bot another
> title "Worlds slowest document eraser" :) Anybody else found good wheels for these little motors?
>
>
> Gabe
>
>
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