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PostPosted: 16.02.2003 14:10 
If I connect an LED to two serie connected AA-batteries, and let it shine constantly, how long does it take before the batteries are empty? And what about if I use a 9V battery and a resistor?


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PostPosted: 16.02.2003 14:45 
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Joined: 24.01.2002 10:09
Posts: 4683
Location: Finland
Really hard to say. With 20mA led and properly calculated resistor maybe a week or two.... ? :)


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