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. Suggested electric fan wiring diagrams suggested primary cooling fan single speed on off using 12 volt switching devices only for primary activation note. Hayden flex a lite or perma cool brands can provide a 12 volt output when activated. Relays shown in these diagrams can provide options.

A pc fan s wire colors are pretty consistent with red almost invariably marking the positive and black marking the negative or ground. The red cable goes to the positive of the power supply vcc and. Finally note that the connector of a common 2 wire fan has a red and a black cable. It uses a 40 amp electric relay and electric fan sensor.

Video of the day. Start your wiring project by taking both of the positive wires from the fans and run them to the yellow wires on each relay tab 87. However for optimum performance it may become necessary to slightly change the values of components c1 r4 and c2. Most stand alone adjustable thermostats i e.

The ins and outs of a 4 wire computer fan.