Re: Fan for a 128DCR

From: Gerrit Heitsch <>
Date: Tue, 15 May 2012 14:45:13 +0200
Message-ID: <>
On 05/15/2012 02:25 PM, Marko Mäkelä wrote:
> On Tue, May 15, 2012 at 01:18:05PM +0200, wrote:
>> The most quick'n dirty approach that worked surprisingly well was to
>> drive 12V fans with 5V (or 6-7 when 5 was too little to give the fan
>> good spin) and still having enough airflow to keep the temperature at
>> reasonable level with enormously reduced noise.
> Yeah, connect the fan between the 12V and 5V rails, and if it fails in
> short circuit, it will take all the 5V circuitry as collateral damage. I
> am not sure if that has ever happened to anyone, though. It would not be
> a big loss on PC hardware, but we are talking C= valuables here. :-)

If you want to be on the safe side, grab a LM317, set it up as an 
adjustable regulator and hook it between +12V from the PSU and the fan, 
then adjust to the desired noise level. Should be possible for less than 
2 Euros if you don't have all the parts handy already.


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Received on 2012-05-15 13:00:48

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