The schematic uses the following resistors for each color in the RGB LED.

Red ---- 360 ohms

Green ---- 180 ohms

Blue ---- 160 ohms

The LED light used (found here: http://www.osram-os.com/Graphics/XPic3/00115411_0.pdf) has the following forward voltages:

...................Min........Typ.........Max

Red....-----...1.8V.......2.05V.......2.4V

Green.-----...2.9V.......3.2V........3.7V

Blue....-----...2.9V.......3.2V.........3.7V

Assuming a current of 20mA....I try plugging these values into the Ohm's Law equation like so:

Ex. (for Red)

R = (Vsource - Vdrop)/(I)

R = (3-2.05)/20

R = 47.5 ohms

That 47.5 ohms is way different than the 360 ohms resistor used in the schematic. I have to be doing something wrong...Can anyone explain the correct calculation?

Thanks in advance.