The Atmel ATmega328 microcontroller used on the Arduino Uno has an analog-to-digital conversion (ADC) module capable of converting an analogue voltage into a 10-bit number from 0 to 1023. The input to the module can be selected to come from any one of six analogue inputs on the chip. While this gives the microcontroller the ability to convert the signals from six different analogue sources into 10-bit values only one channel can be converted at a time. The ADC can convert signals at a rate of about 15 kSPS (samples per second.) The inputs to the ADC module appear on the Arduino board as connections A0 through A5. 1. The following program takes in an analogue input with a 0-5V range and will display the actual value in the LCD. Let X be the actual sensor value and V the corresponding voltage value. The relationship between X and V is given as: V = x = 10 #include #define F_CPU 16000000UL #include #define LCD PORTD #define EN #define RS 2 #define RW 1 unsigned char data; unsigned char channel = 1; void lcdcmd(unsigned char cmd) { PORTB &=-(1