Motor Velocities – MSP430

This fun little project was to simply demonstrate that we could extract the motor velocity of a pulse-width modulated (PWM) driven motor by rerouting the back-emf of the motor during the narrow window of its off-duty cycle to a microcontroller (MSP430). By showing that the ADC conversion values read off the microcontroller corresponded linearly to velocity, we eliminate the need for an external tachometer to read the velocity of the motor.



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