> Or is it used as "indicator" (on a front panel or something) ?
> Then you need only a few mA's (with good quality LEDs).

Very true. I usually get away with a 1 kOhm resistor, which still
shows clearly whether the LED is on or off. I try to minimize current,
because I am mostly designing battery powered applications (although I
can still save a lot with my 9V 78L05 combination, I'm sure).

Greetings,
Maarten Hofman.

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