In double dice kit K3400 there are 12 3mm red leds.
I would like to modify these into 12 bright white leds.
I think the red leds have 20mA or 10mA, and Uv=1,6V? The white leds i want to use, have If=20mA and Uf=3,2V.
What values should i use for R30 - R37?
Most likely, it will work fine without changing the resistors.
Try this first.