Computer Cooling Fan Wiring Diagram

Used 4 wire fan for these two projects.

Computer cooling fan wiring diagram.

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. A pc fan s wire colors are pretty consistent with red almost invariably marking the positive and black marking the negative or ground. Most stand alone adjustable thermostats i e.

The ins and outs of a 4 wire computer fan. Suggested electric fan wiring diagrams suggested primary cooling fan single speed on off using 12 volt switching devices only for primary activation note. The third wire varies depending on the manufacturer but usually it is blue or yellow. You can use almost all standard 3 wire cooling fans with this adapter circuit.

The red cable goes to the positive of the power supply vcc and. You don t need it to make the fan turn but the third wire is there for a good reason. The cooling fan wiring diagram below is what we ve found to be the simplest and most reliable method. Video of the day.

Relays shown in these diagrams can provide options.