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Unformatted text preview: internal resistance then the tolerance of the potentiometer could not be reached to make it go into a straight line-What are the pros and cons of the PWM motor speed control method? o The pros are that this method is much more accurate and reliable than the circuit in lab 3. The cons are that it is a more complicated circuit to build and extra care is needed to make sure the chips and transitor remain fully functional-What would be your recommendation and why, for which system to use if: o Your robot needed cheap and effective speed control. I would recommend the method used in lab 3 because of the fewer number of parts and easier reproduction of the circuit o Your robot was going to be used by NASA to explore Mars. I would recommend the circuit used in this lab if they were to put it in the land rover because the pwm method will allow nasa to control it better....
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- Spring '11