You will be writing an analog input/output program that allows you to control the brightness of a single LED with a single input. First, write a program that reads the analog voltage drop across a potentiometer. This value should range from 0 to 1023 as the potentiometer is adjusted. Next, use this input value to adjust the brightness of an LED from off (0) to full-on (1023). In order to do this, you will need to set up the microcontroller to drive the LED using a PWM signal (use one of the 8-bit timers on PORTD). The resulting demonstration should be such that the LED smoothly transitions from off to full-on as the dial is increased from 0 to 1023