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<DIV dir=ltr align=left><FONT face="Courier New" color=#0000ff size=2><SPAN
class=468522020-28122007>Ah, sorry, meant for all on DPRG, so you can read as
well.</SPAN></FONT></DIV>
<DIV> </DIV>
<DIV><SPAN class=468522020-28122007></SPAN><FONT face="Courier New"><FONT
color=#0000ff><FONT size=2>I<SPAN class=468522020-28122007> wanted to get some
more of those frightened grasshopper kits, and do a cataraman myself. I thought
I'd mount them side by side, and out rig two motors. Also, by crossing motors
and angling the solar cells outward, or by not cross them and angling the cells
in toward each other, I thought I could make a photovore, which would turn
toward the light. Given a bright spot, it would keep the robot moving inside the
beam, turning when it got to the edge of the
spot.</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face="Courier New"><FONT color=#0000ff><FONT size=2><SPAN
class=468522020-28122007></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face="Courier New"><FONT color=#0000ff><FONT size=2><SPAN
class=468522020-28122007>But until I try it, it's only a theory.
</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face="Courier New"><FONT color=#0000ff><FONT size=2><SPAN
class=468522020-28122007></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face="Courier New"><FONT color=#0000ff><FONT size=2><SPAN
class=468522020-28122007>On the other hand, wouldn't this be a comeupance on the
2-transistor and 1-transistor robots taken to a new extreme? In fact, with the
cells pointed down at a reflective surface, and a black line, I think we
could make a 0-transistor line follower. Maybe not, I vaguley recall
someone came up with a 1-photo cell line
follower.</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face="Courier New"><FONT color=#0000ff><FONT size=2><SPAN
class=468522020-28122007></SPAN></FONT></FONT></FONT> </DIV>
<DIV><FONT face="Courier New"><FONT color=#0000ff><FONT size=2><SPAN
class=468522020-28122007>Randy</SPAN></FONT></FONT></FONT></DIV>
<DIV><FONT face="Courier New"><FONT color=#0000ff><FONT size=2><SPAN
class=468522020-28122007><A
href="http://www.newmicros.com">www.newmicros.com</A></SPAN></FONT></FONT></FONT></DIV>
<DIV><BR></DIV>
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<FONT face=Tahoma size=2><B>From:</B> Jeff Koenig
[mailto:koenig.jeff@gmail.com] <BR><B>Sent:</B> Friday, December 28, 2007 1:48
PM<BR><B>To:</B> rmd@newmicros.com<BR><B>Subject:</B> Re: [DPRG] RBNO Today
WEDNESDAY DEC 26<BR></FONT><BR></DIV>
<DIV></DIV>Hi Randy,<BR><BR>(If you want, you can post my reply to the
group. I saw that your message was sent only to me.)<BR><BR>Well, the
two toothbrushes were mounted a few inches from each other on a piece of foam
core, pontoon boat style, so it would never tip over. <BR><BR>It buzzed around
in a circular path. Ed and Eric trimmed the bristles on each brush so
that they were at quite an angle, so the robot "tipped" forward. This made it
go forward very quickly, but probably not as fast as yours. <BR><BR>Only one
motor was used. Actually, three brushes were used, as Ed made a standard
one-brush bristlebot, then mounted two brushes to a separate piece of foam
core. He then lashed the single bristlebot to the two-brush assembly.
<BR><BR>His single brush bristlebot had a two longish pieces of copper wire so
he could bend stabilizing "legs". It was wondered whether two motors
could be used for differential-esque steering. If I get some spare time
this afternoon, I'm going to try to throw one together. <BR><BR>Thanks for the
suggestion! We had a lot of fun, and hopefully we'll have more built
with the motors I handed out.<BR><BR>Best Regards,<BR>Jeff<BR><BR><BR><BR>
<DIV class=gmail_quote>On Dec 28, 2007 1:41 PM, Randy M. Dumse < <A
href="mailto:rmd@newmicros.com">rmd@newmicros.com</A>> wrote:<BR>
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<DIV>
<DIV dir=ltr align=left><SPAN><FONT face="Courier New" color=#0000ff
size=2>How much did the second toothbrush improve stability? Did it maintain
a constant course that way? (I would suppose not, but possibly more so than
a single.) Did he use multiple motors? or just one for the
two?</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN><FONT face="Courier New" color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN><FONT face="Courier New" color=#0000ff
size=2>Randy</FONT></SPAN></DIV><BR>
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<DIV class=Ih2E3d><B>From:</B> <A href="mailto:dprglist-bounces@dprg.org"
target=_blank>dprglist-bounces@dprg.org</A> [mailto:<A
href="mailto:dprglist-bounces@dprg.org"
target=_blank>dprglist-bounces@dprg.org</A>] <B>On Behalf Of </B>Jeff
Koenig<BR></DIV><B>Sent:</B> Friday, December 28, 2007 11:13 AM
<DIV class=Ih2E3d><FONT face="Courier New" color=#0000ff></FONT><FONT
face="Courier New" color=#0000ff></FONT><BR><B>To:</B> <A
href="mailto:dprglist@dprg.org"
target=_blank>dprglist@dprg.org</A><BR><B>Subject:</B> Re: [DPRG] RBNO
Today WEDNESDAY DEC 26<BR></DIV></FONT><BR></DIV>
<DIV>
<DIV></DIV>
<DIV class=Wj3C7c>
<DIV></DIV>Who knew that BristleBots could be so much fun? Ed put
one together at Tuesday's RBNO with two toothbrushes and some outrigger
wires that scooted about quite nicely.<BR><BR>-Jeff<BR><BR><BR><BR><BR>
<DIV class=gmail_quote>On Dec 26, 2007 12:34 PM, Jeff Koenig <<A
href="mailto:koenig.jeff@gmail.com"
target=_blank>koenig.jeff@gmail.com</A>> wrote:<BR>
<BLOCKQUOTE class=gmail_quote
style="PADDING-LEFT: 1ex; MARGIN: 0pt 0pt 0pt 0.8ex; BORDER-LEFT: rgb(204,204,204) 1px solid">I'll
be there. I've got pager motors to give away to the first 25
attendees, so bring your cut-down toothbrush, some double-stick tape,
wire, and a small battery if you'd like to build a Scrub Bot
tonight.<BR></BLOCKQUOTE></DIV><BR></DIV></DIV></BLOCKQUOTE></DIV></BLOCKQUOTE></DIV><BR></BLOCKQUOTE></BODY></HTML>