fan controller - wiring/electronics question

aardvark

aardvark

aardvark

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hi
i've got a zalman mfc1 (the simple black one) and basically one of my case fans when plugged in does not make the led on the controller come on - i've figured out the reason - that fan only has a black and red cable but the other fans that do light up the led speed indicator on the controller have a red/black and a yellow wire (these are 3 pin fans obviously - why the 12cm case fan doesn't have a third cable i don't know).
so, the question is, what can i do to fool the controller into turning on the led?

cheers
 
i think i might have to - i've done some digging and the yellow wire is for relaying fan speed - if it never had one then it looks like there will be no way of adding one.
oh, well, its not like 120mm fans are expensive.
 
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