Jinx wrote:
>
> > 2" x 2" wooden length (or something lighter like
> > PVC pipe), painted black and fluoro yellow on
> > different sides. Use a cheap "toy" type dc motor
>
> Nice touch using pipe and a cheapo motor. We thought
> of something like it as a probable alternative to aluminium
> strips and levers but like I say, nothing got made anyway.
> The only concern I'd have is the torque of a very small (eg
> slot car) motor, and whether it would be enough to get
> something as large as pipe moving. Maybe it could be
> an indirect drive, say a rubber clutch, like a CD drawer
> mechanism, and a leaf switch. Two bumps on opposite
> sides of the pipe (ie 180deg apart) would operate on the
> same switch to tell the driver to stop

The motors I mentioned are quite large, about 3cm
or 4cm long, torques up to 1300g/cm, see the new
Jaycar catalogue or their web site. PLENTY of torque
to direct drive, no drama. :o)
-Roman

--
http://www.piclist.com hint: PICList Posts must start with ONE topic:
[PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads