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How pc fans work the vast majority of pcs has at least one of them they carry the heavy load to keep your pc cool and functional either by providing fresh air in the box or by forcing the hot air to leave a hot surface by pushing cool air. Working of pc fan controller circuit in a normal pc or notebook pc most of the heat generated is by the processor this heat must be removed efficiently and quietly a pc fan along with a heat sink is an excellent active cooling system for computers most modern motherboards include a provision for on board cpu fan control with this the . Hi folks if i want to wire my 4 pin coolink swif2 120p pwm fan yellow black green blue wires direct to a 12v dc source do i connect the yellow lead to the 12v positive the black to ground and ignore the blue and green signal leads. A question we often get asked is where can i find a wiring schematic or wiring diagram for my ceiling fan whether it be a hampton bay hunter or another brand of ceiling fan many fans have the same setup in terms of installation with the below wiring diagrams you can install 90 of ceiling fans no matter the make or model. Ceiling fan with light kit wiring diagram this wiring diagram illustrates the connections for a ceiling fan and light with two switches a speed controller for the fan and a dimmer for the lights the source is at the switches and the input of each is spliced to the black source wire with a wire nut