12 volt adapter is overheating...

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  #1  
Old 12-27-10, 05:10 PM
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12 volt adapter is overheating...

hi,

i added three 12 volt fans (the little ones used to keep desktop computer boxes cool) to a cabinet that holds my PVR and Apple TV, receiver and other A/V components.

I wired the fans in parallel to a 12 volt adapter and after about 5 minutes the adapter gets really really hot.

The adapter reads:

120 VAC 60HZ 8W
24 VAC 4.8 VA

I'm hoping someone can tell me which adapter I should be using to solve this problem.

thanks
 
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  #2  
Old 12-27-10, 05:25 PM
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The fans need 12 volts DC. Your adapter is 24 volt AC. Lucky the motors survived.
 
  #3  
Old 12-27-10, 05:31 PM
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that explains it. wups. thanks
 
  #4  
Old 12-27-10, 05:34 PM
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Thumbs up

I had those fans survive 3x their rated voltage, and they have diodes so they can survive ac, although that is probably not their purpose.
 
  #5  
Old 12-28-10, 12:53 AM
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The other thing did you check how many watts or amp each fan need to run ??

That is the other part why the wallwart get overheat like that.

Merci.
Marc
 
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