Making a raspberrry pi temperature sensor (step 5- Set up the DS18b20)

This is probably one of the most difficult steps in the whole process.

This adafruit guide is probably the best tutorial for setting up the sensor.
http://learn.adafruit.com/adafruits-raspberry-pi-lesson-11-ds18b20-temperature-sensing/overview

The guide uses some parts that aren't necessary like the pi cobbler but life is easier if you have them.

Our ds18b20 came from amazon and had different wire colours to a normal ds18b20 sensor.
It came with red, white and a shielded wire these are:
red - VCC
white - Data
Shielded - Ground

Make sure the 3rd pin on the 5V side is used for ground, the 3.3V pin is used for power and the 4th pi on the 3.3V side is used for the data.