Point to north

Hi guys,

Today i received my Dinsmore digital sensor. I put in on my breadboard and connected all te grounds to te ground and the Vcc to the Vcc of the external battery (7,2V 2A). I run the breadboard and Arduino on this battery. My intension is to get the degrees i'm from the north and display them on the LCD display with the command lcd.print(degrees); .

The four output signals from the sensor are connected to the digital pins 4,5,6,7. I'm a little bit a noob with Arduino and I'm stuck how to progress the signal.

Please ignore the relay.

Can somebody help please?
By the way; im dutch, my English isn't that good :smiley: