Electrical Engineering/How many amps do I need ?


AC ADAPTOR "Can I run all 4 pc fan with this adaptor ?"
Input: 120V AC 60Hz 0.3A
Output: 12V DC 1000mA

COOLER MASTER 120mm Case Fan 4 in 1 pack"Im going to use 4 fans"

DC: 12v 0.16A

4Fans X 0.16A = 0.64Amps "How many amps in my adaptor do I need to run all 4 of them ?"

No, the adapter is way short.  If each fan draws 160ma, 4 fans would draw 640ma.  For long term running an adapter should have a safety margin of 2 or 3 times nominal.  Therefore, you should get either a larger adapter or run two adapters, each one running two pcs.

And you may need a ripple reducer as some fans run better and last longer when run with smooth DC rather than raw rectified output.  

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