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Author Topic: Max current out of 5v pin on UNO?  (Read 3933 times)
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How much current can I safely draw from the 5v pin
on the UNO when powered from USB or power jack ?
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About 450mA from USB and 650mA from power jack. But this last one depends on the input voltage as it is limited by power dissipation.
See:-

http://www.thebox.myzen.co.uk/Tutorial/Power_Examples.html
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450 should do the trick for a test with a powerled i'd like to do.
thx for the fast response.
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