Computer Cooling Fan Wiring Diagram

It uses a 40 amp electric relay and electric fan sensor.

Computer cooling fan wiring diagram.

The third wire varies depending on the manufacturer but usually it is blue or yellow. Suggested electric fan wiring diagrams suggested primary cooling fan single speed on off using 12 volt switching devices only for primary activation note. Video of the day. Finally note that the connector of a common 2 wire fan has a red and a black cable.

You don t need it to make the fan turn but the third wire is there for a good reason. You can use almost all standard 3 wire cooling fans with this adapter circuit. The ins and outs of a 4 wire computer fan. Used 4 wire fan for these two projects.

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. A pc fan s wire colors are pretty consistent with red almost invariably marking the positive and black marking the negative or ground. However for optimum performance it may become necessary to slightly change the values of components c1 r4 and c2.

Hayden flex a lite or perma cool brands can provide a 12 volt output when activated.