You talking about angular distance or the length of the TOP of the pedal towards
the floor.  On different vehicles I suspect that the length of the pedal would
be different and therefore the TOP of the pedal would travel different distances
even with the same angular distance.

Jon Petty wrote:

> I
>
> I have an application where I need way to accurately measure distance with
> PIC or BS2. I need to measure pedal travel on different vehicles. The
> distance measurement need to be repeatable. So each time the measurement
> device is attached to the pedal the same measurement is made.
>
> To explain further, say a linear potentiometer is used. If the potentiometer
> is angled to contact the floor at different places the pedal travel
> measurement will be different. That is something I need to eliminate. An
> ideal solution would be a non contact method that would measure the same way
> each time the device is attached to the pedal.
>
> The measuremnet needs to be accurate to an 1/8" and repeatable. The cost of
> raw measurement components should be less then $20.
>
> What would the best measurement method be?
>
> Any ideas or other suggestions?
>
> Thanks
>
> Jon