Computer Cooling Fan Wiring Diagram

You don t need it to make the fan turn but the third wire is there for a good reason.

Computer cooling fan wiring diagram.

Used 4 wire fan for these two projects. The ins and outs of a 4 wire computer fan. The red cable goes to the positive of the power supply vcc and. The third wire varies depending on the manufacturer but usually it is blue or yellow.

Relays shown in these diagrams can provide options. However for optimum performance it may become necessary to slightly change the values of components c1 r4 and c2. Finally note that the connector of a common 2 wire fan has a red and a black cable. The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method.

Most stand alone adjustable thermostats i e. Hayden flex a lite or perma cool brands can provide a 12 volt output when activated. Video of the day. A pc fan s wire colors are pretty consistent with red almost invariably marking the positive and black marking the negative or ground.

Suggested electric fan wiring diagrams suggested primary cooling fan single speed on off using 12 volt switching devices only for primary activation note.