Reply to "LED Resistor heat:"

gunrunnerjohnOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

@stan2004 posted:
Come on guys, it was way back in the last century but remember your 2nd-year EE course on semiconductor physics? The same "mechanism" that causes two LEDs in parallel to split current differently will occur with two LEDs in series.

Well Stan, you're wrong on one point. The current in the LED's will be exactly the same in a series string! The efficiency of the LED's may indeed figure into the differing brightness, no argument there.

@stan2004 posted:
In other words just because you force the same current in a series configuration doesn't mean the two LEDs will have the same brightness.

True, but not because of different currents.

9/2/229:54 PM

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