hi:friend i have a led project ,need linear dimming, use ARM K60N512VMD100 ADC to control PWM dimming. the ADC is 0.5V-5V, pwm ratio 2% to 100%. step need greater than 200. if me use read table , the curve is not linear . have you one tell me ,how can i to do , is the ARM powerful for the job,
No - most of our senses requires exponentially stronger stimuli.
So to dim display in the dark needs to be very, very, very much weaker than a strong display in daylight.
I have 10000 intensity steps in the displays I have programmed. And that is still not really dark when viewed in a dark room.