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Reply to "Need a Little Help with a DipTrace Schematic Please"

MED posted:

... but here is a possible way to control current ramp through LEDs. 

There is reason to use a microcontroller/Arduino as GRJ suggests for fade-in/fade-out.  The brightness change for a flashing incandescent bulb is not correctly modeled by the ramp-up/ramp-down of a resistor-capacitor.  Agreed, we're talking hobby-grade and most guys would be satisfied with any fade effect.  The microcontroller would permit a more prototypical fade-in/fade-out effect at no extra cost once it's put in place (i.e., "just" a few more lines of code! ).

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