cpu fan motors with 3 wires

aljsk8

Enlightened
Joined
Sep 7, 2006
Messages
435
Location
Wigan, UK
not really a flashlight question but i want to use a cpu heatsink and fan in a project

all the fans i see (the old used ebay ones im looking at) have 3 wires which tells me they are brushless (although im not sure if they are)

can i run these motors off 2 of the wires from a 12v battery?

thanks

Alex
 

rizky_p

Flashlight Enthusiast
Joined
Mar 26, 2006
Messages
1,440
Location
13th Colony
Yes the third wire (yellow but cant quite remember) is for rpm signal. Just connect the other two. There other newer cpu fans with 4 cables, this one for PWM signal.
 
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