Cooling fans 5V and 12V are commonly used, 12V fans are more common. Generally, the higher the power of the fan, the greater the air volume and power consumption, so the main power depends on the power.

The working principle of the cooling fan is realized by energy conversion, which includes electric energy electromagnetic energy mechanical energy kinetic energy. The circuit principle is divided into many forms. If different circuits are used, the performance will also be different. When 5V and 12V are used, the knowledge voltage is different, and the speed is different.