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Can someone please tell me if this will work with an arduino
http://uk.farnell.com/jsp/search/productdetail.jsp?CMP=cmwis_email&sku=1936419
Im not sure of the code to use to control the 2-10v.
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The issue not with a code, rather a hardware. Arduino is 5V platform, you can't get 7 or 10 w/o additional components. It will works at max 85-90% w/o
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It'll work, though you'll probably need some other circuitry to drive the relay itself for the 10 volts.

Controlling a 10V power supply with a MOSFET from the arduino is easy. Then have that 10V supply control the relay.
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Also be sure you understand the limitation of this device that the datasheet lists on it's cover sheet:

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For use with resistive loads only

Lefty
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Am i right in thinking that a mosfet doubles the voltage put into it, so if i put in 5v from the arduino i will get 10v out from the mosfet.
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No madmurg.
A Logic Level MOSFET can be  used to switch 10V (or more) on/off from a 5V control source tho.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
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Some examples
The NPN front of the P-channel MOSFET lets the gate go to 12V to turn the part fully off.


* MOSFET_driver_examples.jpg (61.46 KB, 960x720 - viewed 21 times.)
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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I think I understand now, i need a 10v  power supply to run through the mosfet which is controlled by the arduino pwm 0-5v, is this correct?
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Yes.
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Designing & building electrical circuits for over 25 years. Check out the ATMega1284P based Bobuino and other '328P & '1284P creations & offerings at  www.crossroadsfencing.com/BobuinoRev17.
Arduino for Teens available at Amazon.com.

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