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! Message was sent through the cbm-hackers mailing listReceived on 2012-05-15 14:00:39
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