1. Write an Arduino program that measures the distance to an object using the UltraSonic Ranger Sensor.
   1. Must include a function that when called returns the distance in centimeters.
   2. Include a timeout feature to ensure that your program does not get stuck when there is no echo (nothing detected)
   3. Output the distance to the serial port in 0.5second intervals
2. Write an Arduino program that detects a line using the line sensor array.
   1. Your code must calibrate the line sensor
   2. Output the line position to the serial port in 0.5second intervals
3. Write an Arduino program that uses the IR transmitter/receiver to detect whether or not IR light is being received by the IR photodiode.
   1. You will need to build a circuit to use the transmitter/receiver pair
   2. You must use analogRead to read the sensor value
   3. Output the line sensor reading to the serial port in 0.5second intervals