Platform is a big issue.
I don't know about "biggest" though.
> > I think I've mentioned my plans to use a "retired" child's
> > battery operated car. It has pleny of load capacity; plenty
> > of power and are available cheep second hand. They are also
> > already wired for 6v and 12v operation (with motors, wheels,
> > the works.)
>
> I took apart my daughter's car.
[snip]
> It's quite powerful. However a couple of open issues:
> 1) The gearing is set up to spin only forward. A "jiggle" gear slips if
> the motor is spun backward.
>
> 2) Since only one motor is driving the back wheels, steering much be
> accomplished some other way.
My son's "bigfoot" contruction is different.
1 motor on each wheel (could do a differential speed steering thing)
And it drives backwards. (the truck has a reverse switch).
My concerns were
1) SLOW IT DOWN; the thing FLIES.
a PWM signal could do that.
2) Steering.
Differential drive is all the rage, but I'd been thinking
about using the existing steering. (I'd need good position
information.)
-- -Monta Elkins--------------------------------------------------------- | "All that is necessary for evil to triumph is | | for good men to do nothing." -- Edmund Burke | | Monta nospam at bev.net ----------------- http://www.bev.net | | System Administrator - Blacksburg Electronic Village | ---------------------------------------------------------