3 Wire Computer Fan To 2 Wire

And used mainly on cpu heatsink fans.

3 wire computer fan to 2 wire.

A 4 pin fan uses its first three wires the same way a 3 pin fan does. Hi i recently within the last 3 months built my own pc. However two fans with 3 wire connectors may not have the same wire colors. The fourth wire connects to a circuit on the main board that s used to control the fan with precision.

Those fans are usually the fans that are referred to as 3 wire fans when talking about pcs. Instead of simple speed up or slow down controls the fan can be set to specific fan speeds as the cpu gets hotter. Finally note that the connector of a common 2 wire fan has a red and a black cable. The red cable goes to the positive of the power supply vcc and the black to the negative gnd.

On these 4 wire computer fans i have found that some times they require an input to tell it how fast to spin so simply supplying power to 2 of the wires will not work if you have a 3 wire fan however you can supply power to the red and black and leave the white disconnected. 4 wire fans have that same output as 3 wire fans but also a pwm input pin that you can drive with a regular old pwm output pin from an arduino or motherboard. Email me if you wish a more in depth explanation. The lighting could be added to the three wire cable provided that the circuit breaker is no more than 15 amps and the wire size is no greater than 14 gauge.

Three wire supply cables generally carry red and black hot wires of 110 to 120 volts each with a single white neutral wire. Of course all you need is the red and black wire to run your computer fan but if you didn t know what the extra wires are for this video may help you out. 2 wire fans are just power connections 3 wire fans have an extra output from the fan to tell the generally motherboard what speed the fan is turning. 3 wire is for fan speed pick one black or red one is for high speed and one is low and then tape off unused wire on fan hope that helps if not i will try to explain better.

They are quite 12dba so i would like to keep them as other 3pin fans seem to be 25dba. I ordered 2 80mm case fans assuming that they would be 3pin mobo connector and 4pin cd power connector but they were just 4 pin. He bought a new fan for 10 and said it has 3 wires on it. Is it possible to convert the fans from 2 wire to 3 wire im not too shabby with a soldering iron if thats required.