Here is a simple mod to allow the speed of any 12V fan to be varied. All we need to do is insert a rheostat or variable resistor in the 12V wire to the fan. The rheostat should be rated at least 3 ...

Create your own powerful table fan with a 12V DC motor! This easy DIY project is perfect for staying cool and learning some basic electronics. Ideal for home or school science projects! Patrick ...

The temperature-controlled PWM boost converter in Figure 1 allows operation of a 12V brushless dc fan from a 5V supply. The circuit is based on IC 1, a single-chip, BiCMOS, PWM controller that ...