Hi,
thanks for your explanation. My application is about dimming power leds. Dimming is not linear at all, and for some reason, I cannot go near zero . I think it is because of integrated led driver, that must perform pwm internally. Anyway, I count get it working by using 16bits timer on an arduino Uno using LUT table to obtain linear fading. now I have to port to an arduino Mega, and your library is very "time saver" for me.
thank you.