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Three-wire fan

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Hi-tex Posted messages 44 Status Member -  
Hi-tex Posted messages 44 Status Member -
Hello, I have recovered a fan with 3 wires. The three wires are red for 12V, black for 0V, but I have a yellow one and I'm wondering what it's for. Thank you for your replies. 
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5 answers

  1. Anonymous user
     
    You must have one or more connectors on the motherboard with 3 pins... you can only plug it in one way! Usually, next to it, it says "FAN..."
    2
    1. Hi-tex Posted messages 44 Status Member 7
       
      There is nothing written, but on the probe's wire, do I get a voltage or can I connect a potentiometer to it to vary the speed???
      0