No schematic, no sketch, no links to components, no answers..
There are current limits to your Arduino outputs, ~20mA per pin.We need to know more about what you are driving.i.e. is the Arduino driving the leds directly or the driver type it is driving.These are 12v strips..
As I have stated and showed in the picture, I am driving them with PC's 12v rail. (VIN pin).
I can never get the color I want. It is always some mix of all colors.
4-pin computer fans already have a drive circuit inside.Just connect a 12volt supply to the fan, share grounds, and connect a PWM signal to the PWM pin of the fan.Leo..
Do you know any way to to eliminate it?