Features: Motor drive module interfaces, PWM wave generated by timing module DC motor drive, and if you do not have the DC motor, you can measure what uln2003 the input waveform, if you have a DC motor, you need to uln2003 output interface external pull-up resistor to power up your motor drive module.

实验22 PWM电机调速\ul2003\STARTUP.A51
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实验22 PWM电机调速

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