Servo Magazine ( August 2008 )
Build a PWM Circuit to run a VEX Motor
By John Toebes View In Digital Edition
As part of this year’s Science Olympiad competition, the students were tasked with building an electric car that would go a certain distance and stop. While the Vex Robotics kit from Innovation First is ideal for building such a vehicle, the competition restriction on batteries precluded the use of the 7.2V NiCad that the Vex controller uses. Fortunately, this gave an opportunity to experiment with other ways to drive the Vex motor and control the car...
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