3 Pinputer Fan Wiring Diagram. 3 wire pc fan wiring diagram. 4 wire pc fan.
In a 3 wire fan first two wires are the power supply wires of the fan. 3 pinputer fan wire diagram diagram base website wire diagram. The tacho signal from the fan sinks to ground for every revolution the input on the motherboard is pulled high.
From the third wire the motherboard can read the tacho of the fan and see if the fan is running and with how many rpms.
3 pin fan and 4 pin motherboard connector compatibility. 3 wire computer fan wiring diagram. The third wire comes directly from the output of the built in hall sensor chip generates output pulses during the fan rotation. Of course all you need is the red and black wire to run your computer fan but if you didnt know what the extra wires are for this video may help you out.