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.
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
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.
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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.
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