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Old 04-16-2012, 09:27 AM   #793 (permalink)
eimix
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if LED requires more current then Arduino +3.3V pin could provide - other +3.3V voltage regulator should be used.

Resistors could be similar - just output voltage should be between 3V-3.3V
If you have any other 5V->3.3V divider/converter - it could be used inplace of all resistors.
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