Re: Fan for a 128DCR

From: silverdr_at_wfmh.org.pl
Date: Tue, 15 May 2012 15:57:41 +0200
Message-Id: <C8EF2EC1-0108-44C7-B0C0-8B0E4E93B021@wfmh.org.pl>
On 2012-05-15, at 14:45, Gerrit Heitsch 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.

Exactly. If 5V was not enough (which wasn't that often as it might seem to be) I always derived desired voltage from the original 12.

-- 
SD!
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Received on 2012-05-15 14:00:39

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