Computer Related > What's this wire for ? Auctions
Thread Author: hawkeye Replies: 4
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New Sat 15 May 10 23:24 
 What's this wire for ? - hawkeye
I've bought a 12v computer cooling fan off Ebay. It's got a red and a black wire which go to +ve and -ve respectively and the fan blows nicely. There is also a yellow wire attached to the connector. What's this for? Speed control? Detonator? Hair dryer conversion?

Your expertise in this would satisfy my curiosity.

TIA
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New Sat 15 May 10 23:28 
 What's this wire for ? - VxFan
The third wire is for speed control.
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New Sun 16 May 10 08:48 
 What's this wire for ? - hawkeye
Thank you Mr Fan.
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New Sun 16 May 10 09:49 
 What's this wire for ? - Zero
Strictly speaking, the third wire is for speed sensing, not control. Its a simple pulse tacho line.
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New Sun 16 May 10 08:53 
 What's this wire for ? - Roger.
I bought a similar cooling fan for my SKY (Pace 2600C) box. Hooked it up to a redundant plug transformer and it runs 24/7 with no problems! (The Pace 2600C is a square box with air vents on top.)
I just cut off the third wire & wrapped the short piece left in insulating tape.
(Overheating is a primary cause of failure of SKY boxes and it does get hot on the Costa del Sol!)
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