That was my initial thought too, but im sure there is something simpler out there in this whole wide world to get me speedI doubt if you can beat having the car cut 2 light beams a measured distance apart, with photosensors connected to a microcontroller which would then measure the time to travel the distance, and send the result to the PC.
Well fine Mister wise guy! Just write yourself a stop watch program triggered by the parallel port pins.With a stopwatch what shall be the PC interface ? - My hands?
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by Ikimi .O