DC motor speed control circuit diagram
Source: InternetPublisher:吃掉星星 Keywords: Speed control DC motor Updated: 2020/05/16
This circuit uses a 4011 CM0S NAND gate, a pair of diodes and an NPN power transistor to provide a variable duty cycle DC power supply. Speed control is adjusted based on the average voltage change applied to the motor. But the peak voltage does not change. At very low speeds, pulse power is effective, always running the motor. At higher speeds, the motor operates normally.
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