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| ivwshane:
--- Quote from: Franco B on November 07, 2008, 02:34:06 am ---You need to know a few details before you can figure out what resistors to use and how to wire them. * Source voltage you are using (either 5v or 12v from your PSU) * LED forward voltage (should be somewhere around 3v) * LED forward current (should be somewhere around 30mA) * The amount of LEDs you wish to light When you know all of them put them into [this] calculator and it will tell you which resistors you will need and how to wire them (series/parallel/combination). --- End quote --- Thanks. Since these are second hand led's am I screwed if I don't know the values (other than the source voltage)? |
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