I would like to control the speed of a 3/4 HP 12 VDC motor with a 3.3 VDC microcontroller. I've seen in past issues where PWM was used to control small DC motors but not fractional HP motors. Can someone show a circuit to interface the high power motor with a low power MCU from a 12V auto battery? Presently, I'm trying to use a Freescale MC9S08QG8 MCU. Ultimately, I would like to use the motor as a brake, and then reverse rotation on a small flywheel for a few revolutions. The motor goes the same direction all the time, just the flywheel will reverse direction.
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机译：我想用3.3 VDC微控制器控制3/4 HP 12 VDC电机的速度。我在过去的问题中看到过使用PWM控制小型DC电动机，但不使用分数HP电动机的问题。有人可以用12V自动电池显示一个电路将高功率电机与低功率MCU相连吗？目前，我正在尝试使用飞思卡尔MC9S08QG8 MCU。最终，我想将电动机用作制动器，然后在小型飞轮上反转几转。电机始终保持相同方向，只是飞轮会反转方向。
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