Arduino Dark Sensor

This is a simple arduino program which i wrote for my first arduino-ible. It basicly callibrates to the dark and light levels within the room and tells you its opinion. In this instructable i will show you what hardware you need and the code of which I wrote. It is relatively simple but is not just limited for  light sensing, it could use anything from themisters to a gyroscope (providing you tweak the code). If you do get stuck during the programing or testing stage I have only a limited knowledge of programing so I shall help where i can.

Step 1 Hard Ware

First for this project we will need:
#1x photoresister
#2x 1k resister
#2x 2 inch long wire(multistrand works well with protoshield breadboard)
#1x arduino(i used the arduino uno)
#(optional) 1x protoshield
#1x LED(any colour) (most protosheilds have one spare on anyway)