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Jul 1, 2011 at 14:38 vote accept Mark
Jul 1, 2011 at 13:24 history edited stevenvh CC BY-SA 3.0
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Jul 1, 2011 at 11:59 history edited stevenvh CC BY-SA 3.0
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Jul 1, 2011 at 11:22 comment added stevenvh @Mark - then you should have calculated the largest resistor value allowed, for the smallest current!
Jul 1, 2011 at 7:37 history edited stevenvh CC BY-SA 3.0
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Jul 1, 2011 at 7:05 history edited stevenvh CC BY-SA 3.0
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Jul 1, 2011 at 6:05 history edited stevenvh CC BY-SA 3.0
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Jun 30, 2011 at 18:07 comment added Mark I used \$R=\frac{3.3V - 1.4V}{50mA}=38\Omega\$, so that should've been the absolute smallest resistor possible. I'd have used something larger in practice (I always like to err on the side of too little current, rather than too much, since those errors are less permanant...)
Jun 30, 2011 at 17:11 history answered stevenvh CC BY-SA 3.0