This design uses the PIC16F887 through the potentiometer voltage value A/D conversion, and thus the speed setpoint sampling According to the principle of pulse width modulation using a microcontroller to adjust the output PWM high time to control the rotational speed of the DC motor motor speed byMCU CCP capture module to capture the pulse signal generated by the photoelectric shelter, calculated for speed, while the measured speed with a given value of rapid adjustment of the motor speed control motor speed within a certain error the key module is the input error range for a given speed, while LCD able to display the motor speed to achieve good human-computer interaction.

pic电机控制.c

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