Jeremy Darling said:
> The particular cars that I am
> working with run about 40mph on a track that is 120ft long and  32ft
> wide with 8ft segments.  I hope that the pic will be fast enough to
> control the car at this low speed (normally they run about 60mph).

I believe a human's clock speed is more than that of a PIC, 40mph might be
a bit too much to expect ;-)

Wasn't it Tony Nixon who was controlling (real) automobiles with a
microcontroller?

You'll need position feedback continuously, ultrasonic sounds like a
headache to me. Especially if you have more than 1 car on the track.

Cheerful regards,

Bob

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