Good ideas Ludwig and Stan, I'll try adjusting the values in the 22k - 22k voltage divider that generates the ADC_5V output.? Perhaps provide some drive from the PWM_5V signal, then the ADC_5V signal would be proportional to the drive PWM and the processor would have the illusion of control.? Maybe another R from +12V, to allow for the smaller max PWM ratio when the input V is higher.? Wonder how complicated I can make it...
