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Simple PWM motor control circuit using IC 4011

This is Simple PWM motor control circuit using IC-4011. We can adjust speed of 12V small motor. It is easy and uses a few components that IC digital and transistor driver as main.

If you want to control the speed of a small 12 volt DC motor. Before will see others circuit. I introduce this circuit as the figure that shows below. They are simple circuit because used a little piece of the component.

Simple PWM motor control circuit using IC 4011

There are a Nand gate Digital CMOS IC number CD4011   as main of the circuit. Which it is determined to works in the PWM model(pulse width modulation) so has high It is highly effective, Low power consumption

  • We use a potentiometer-VR1 to adjust the speed as needed.
  • Next, we use two transistors are TIP41 and BC548 to connect in a Darlington makes drive current higher.
  • We should hold a heat sink at TIP41 due to it heat when they are applied.
  • While motor function, may be a reverse current, it must put Diode D1-1N4148 to prevent this circuit.
  • This circuit we bring to use with AC Line power so has T1 to reduce a voltage down into 12V. Then, AC current flow through to D1-D4 to the full wave rectifier into DC current. And there is C1 filter to DCV that smooth so well.

    Ready to use the 12 volt DC motor controller. But if you want use it with 12-volt battery, you can remove this section go out.


    But if you want circuit that a good than this circuit. see these circuits.
    PWM Control Speed 12V Motor for power dc motor of 12V to 24V motor using TL494.

    Keep reading: ‘LED Chaser circuit’ »

    This Post Has 8 Comments

    1. Diode D3: What does it mean 1000MF?

    2. Hi, @nikolic
      I truly regret for my error.

      Now I modify it. please see it again.

    3. The language used for the text under various schematics is not quite understandable at places and meaning is lost. I have fullest regards for your mother tongue but can something be done about my problem. Your website is so informative and rich in technical material that I possibly cannot ignore it. Your efforts are commendable. Keep it up.

    4. The Q1 is BC548 or BC549 ,and u means ( While motor function, may be a reverse current, it must put Diode D1-1N4148 to prevent this circuit.)
      so this is the D1 or D5???

    5. Sir, by this method (pwm) , can be speed control of stepper motor.,,

    6. what is the purpose of the two resistor sir? and why itis a Npn Bjt and not pnp? pardon may ignorance because I will have a report and I will use this circuit so that is why I Need to report perfectly and answer all question that may teacher prepared if I want to pass…

    7. Have you got a controller that can run a small motor from 24vAC to 24V DC max 12 amps 10 amps will do

    8. i tried this circuit and it fried the TIP41 transistor , am not sure what i got wrong

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