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Old 08-07-2018, 02:11 AM   #4 (permalink)
East Broad Top
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Join Date: Dec 2007
Location: Centennial, CO
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I've always used 1K ohm resistors with my LEDs. Those tend to work up through all the track voltages common to large scale. If you know you're going to be running on lower voltages (battery power, for example) you can use lower-value resistors, but you don't really save anything by doing so--except time if you can't find your blasted stash of 1K ohm resistors and can only find 680 ohm resistors. (Purely hypothetical situation, mind you.)

Later,

K
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