I have some so really basic questions about controlling RGB leds with the arduino. I'm fine with the programming side of things but the electronics are confusing me...
If 3 leds (or the 3 colours of an RGB) are attached to 3 output pins are they in parallel? I'm trying to work out how to calculate the resistors required - do you calculate each output seperately or do you need to work them all out together?
If they are in parallel, how do you work out the resistors required for different colours? All of the calculators I've seen seem to work for identical LEDs.
Also - I've created a lamp that uses PWM to cycle a single RGB through all possible colours but it's not very bright. What is the correct route for me to go down to add extra LEDs?